package advancedcalculator;

import java.util.Stack;

import javax.swing.JOptionPane;

class EvaluateString
{
    public static int evaluate(String expression)
    {
        char[] tokens = expression.toCharArray();
 
         // Stack for numbers: 'values'
        Stack<Integer> values = new
                              Stack<Integer>();
 
        // Stack for Operators: 'ops'
        Stack<Character> ops = new
                              Stack<Character>();
 
        for (int i = 0; i < tokens.length; i++)
        {
             
            // Current token is a
            // whitespace, skip it
            if (tokens[i] == ' ')
                continue;
 
            // Current token is a number,
            // push it to stack for numbers
            if (tokens[i] >= '0' &&
                 tokens[i] <= '9')
            {
                StringBuffer sbuf = new
                            StringBuffer();
                 
                // There may be more than one
                // digits in number
                while (i < tokens.length &&
                        tokens[i] >= '0' &&
                          tokens[i] <= '9')
                    sbuf.append(tokens[i++]);
                values.push(Integer.parseInt(sbuf.
                                      toString()));
               
                // right now the i points to
                // the character next to the digit,
                // since the for loop also increases
                // the i, we would skip one
                //  token position; we need to
                // decrease the value of i by 1 to
                // correct the offset.
                  i--;
            }
 
            // Current token is an opening brace,
            // push it to 'ops'
            else if (tokens[i] == '(')
                ops.push(tokens[i]);
 
            // Closing brace encountered,
            // solve entire brace
            else if (tokens[i] == ')')
            {
                while (ops.peek() != '(')
                  values.push(applyOp(ops.pop(),
                                   values.pop(),
                                 values.pop()));
                ops.pop();
            }
 
            // Current token is an operator.
            else if (tokens[i] == '+' ||
                     tokens[i] == '-' ||
                     tokens[i] == '*' ||
                        tokens[i] == '/')
            {
                // While top of 'ops' has same
                // or greater precedence to current
                // token, which is an operator.
                // Apply operator on top of 'ops'
                // to top two elements in values stack
                while (!ops.empty() &&
                       hasPrecedence(tokens[i],
                                    ops.peek()))
                  values.push(applyOp(ops.pop(),
                                   values.pop(),
                                 values.pop()));
 
                // Push current token to 'ops'.
                ops.push(tokens[i]);
            }
        }
 
        // Entire expression has been
        // parsed at this point, apply remaining
        // ops to remaining values
        while (!ops.empty())
            values.push(applyOp(ops.pop(),
                             values.pop(),
                           values.pop()));
 
        // Top of 'values' contains
        // result, return it
        return values.pop();
    }
 
    // Returns true if 'op2' has higher
    // or same precedence as 'op1',
    // otherwise returns false.
    public static boolean hasPrecedence(
                           char op1, char op2)
    {
        if (op2 == '(' || op2 == ')')
            return false;
        if ((op1 == '*' || op1 == '/') &&
            (op2 == '+' || op2 == '-'))
            return false;
        else
            return true;
    }
 
    // A utility method to apply an
    // operator 'op' on operands 'a'
    // and 'b'. Return the result.
    public static int applyOp(char op,
                           int b, int a)
    {
        switch (op)
        {
        case '+':
            return a + b;
        case '-':
            return a - b;
        case '*':
            return a * b;
        case '/':
            if (b == 0)
                throw new
                UnsupportedOperationException(
                      "Cannot divide by zero");
            return a / b;
        }
        return 0;
    }
 
    // Driver method to test above methods
    
}
public class calculator extends javax.swing.JFrame {

    /**
     * Creates new form calculator
     */
    
    double num,ans;
    int calculation;
    public calculator() {
        initComponents();
        
        jRadioButton1.setEnabled(false);
    }
    
    
    
    /*public void Calculations()
    {
        switch(calculation)
        {
            case 1 -> {
                //Addition
                
                ans = num + Double.parseDouble(outputField.getText());
                outputField.setText(Double.toString(ans));
                
            }
            case 2 -> {
                //Subtraction
                ans = num - Double.parseDouble(outputField.getText());
                outputField.setText(Double.toString(ans));
            }
            case 3 -> {
                //Multiplication
                ans = num * Double.parseDouble(outputField.getText());
                outputField.setText(Double.toString(ans));
            }
            case 4 -> {
                //Division
                ans = num / Double.parseDouble(outputField.getText());
                outputField.setText(Double.toString(ans));
            }
            case 5 -> {
                //Square
                ans = num *num;
                outputField.setText(Double.toString(ans));
            }
            case 6 -> {
                // Square Root
                ans = Math.sqrt(num);
                outputField.setText(Double.toString(ans));
            }
            case 7 -> {
                // Cube Root
                ans = Math.cbrt(num);
                outputField.setText(Double.toString(ans));
            }
                
               
                
                
        }
    }
    */
    
    public void on()
    {
        outputField.setEnabled(true);
        
        
       jRadioButton2.setEnabled(true);
       jRadioButton1.setEnabled(false);
       
        
        zeroBtn.setEnabled(true);
        oneBtn.setEnabled(true);
        twoBtn.setEnabled(true);
        threeBtn.setEnabled(true);
        fourBtn.setEnabled(true);
        fiveBtn.setEnabled(true);
        sixBtn.setEnabled(true);
        sevenBtn.setEnabled(true);
        eightBtn.setEnabled(true);
        nineBtn.setEnabled(true);
        
        clearBtn.setEnabled(true);
        plusBtn.setEnabled(true);
        minusBtn.setEnabled(true);
        divideBtn.setEnabled(true);
        multBtn.setEnabled(true);
        
        oprnBtn.setEnabled(true);
        equalBtn.setEnabled(true);
        delBtn.setEnabled(true);
        closeBtn.setEnabled(true);
        
        jRadioButton1.setEnabled(true);
    }
    
    
    public void off()
    {
        outputField.setEnabled(false);
        
        jRadioButton1.setEnabled(true);
        jRadioButton2.setEnabled(false);
        
        zeroBtn.setEnabled(false);
        oneBtn.setEnabled(false);
        twoBtn.setEnabled(false);
        threeBtn.setEnabled(false);
        fourBtn.setEnabled(false);
        fiveBtn.setEnabled(false);
        sixBtn.setEnabled(false);
        sevenBtn.setEnabled(false);
        eightBtn.setEnabled(false);
        nineBtn.setEnabled(false);
        
        clearBtn.setEnabled(false);
        plusBtn.setEnabled(false);
        minusBtn.setEnabled(false);
        divideBtn.setEnabled(false);
        multBtn.setEnabled(false);
         closeBtn.setEnabled(false);
        
        oprnBtn.setEnabled(false);
        equalBtn.setEnabled(false);
        delBtn.setEnabled(false);
        
        
        
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        buttonGroup1 = new javax.swing.ButtonGroup();
        outputField = new javax.swing.JTextField();
        jRadioButton1 = new javax.swing.JRadioButton();
        jRadioButton2 = new javax.swing.JRadioButton();
        delBtn = new javax.swing.JButton();
        clearBtn = new javax.swing.JButton();
        plusBtn = new javax.swing.JButton();
        sevenBtn = new javax.swing.JButton();
        sixBtn = new javax.swing.JButton();
        oneBtn = new javax.swing.JButton();
        eightBtn = new javax.swing.JButton();
        fourBtn = new javax.swing.JButton();
        fiveBtn = new javax.swing.JButton();
        multBtn = new javax.swing.JButton();
        twoBtn = new javax.swing.JButton();
        nineBtn = new javax.swing.JButton();
        minusBtn = new javax.swing.JButton();
        divideBtn = new javax.swing.JButton();
        threeBtn = new javax.swing.JButton();
        zeroBtn = new javax.swing.JButton();
        equalBtn = new javax.swing.JButton();
        oprnBtn = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        labelSymbol = new javax.swing.JLabel();
        closeBtn = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Advanced Calculator");
        setLocation(new java.awt.Point(500, 250));
        setResizable(false);
        setType(java.awt.Window.Type.UTILITY);

        outputField.setEditable(false);
        outputField.setFont(new java.awt.Font("Segoe UI", 1, 23)); // NOI18N
        outputField.setHorizontalAlignment(javax.swing.JTextField.RIGHT);

        buttonGroup1.add(jRadioButton1);
        jRadioButton1.setFont(new java.awt.Font("Segoe UI", 1, 11)); // NOI18N
        jRadioButton1.setText("ON");
        jRadioButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jRadioButton1ActionPerformed(evt);
            }
        });

        buttonGroup1.add(jRadioButton2);
        jRadioButton2.setFont(new java.awt.Font("Segoe UI", 1, 11)); // NOI18N
        jRadioButton2.setText("OFF");
        jRadioButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jRadioButton2ActionPerformed(evt);
            }
        });

        delBtn.setFont(new java.awt.Font("Segoe UI", 1, 14)); // NOI18N
        delBtn.setText("<--");
        delBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                delBtnActionPerformed(evt);
            }
        });

        clearBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        clearBtn.setText("C");
        clearBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                clearBtnActionPerformed(evt);
            }
        });

        plusBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        plusBtn.setText("+");
        plusBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                plusBtnActionPerformed(evt);
            }
        });

        sevenBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        sevenBtn.setText("7");
        sevenBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                sevenBtnActionPerformed(evt);
            }
        });

        sixBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        sixBtn.setText("6");
        sixBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                sixBtnActionPerformed(evt);
            }
        });

        oneBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        oneBtn.setText("1");
        oneBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                oneBtnActionPerformed(evt);
            }
        });

        eightBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        eightBtn.setText("8");
        eightBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                eightBtnActionPerformed(evt);
            }
        });

        fourBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        fourBtn.setText("4");
        fourBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                fourBtnActionPerformed(evt);
            }
        });

        fiveBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        fiveBtn.setText("5");
        fiveBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                fiveBtnActionPerformed(evt);
            }
        });

        multBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        multBtn.setText("*");
        multBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                multBtnActionPerformed(evt);
            }
        });

        twoBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        twoBtn.setText("2");
        twoBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                twoBtnActionPerformed(evt);
            }
        });

        nineBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        nineBtn.setText("9");
        nineBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                nineBtnActionPerformed(evt);
            }
        });

        minusBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        minusBtn.setText("-");
        minusBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                minusBtnActionPerformed(evt);
            }
        });

        divideBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        divideBtn.setText("/");
        divideBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                divideBtnActionPerformed(evt);
            }
        });

        threeBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        threeBtn.setText("3");
        threeBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                threeBtnActionPerformed(evt);
            }
        });

        zeroBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        zeroBtn.setText("0");
        zeroBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                zeroBtnActionPerformed(evt);
            }
        });

        equalBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        equalBtn.setText("=");
        equalBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                equalBtnActionPerformed(evt);
            }
        });

        oprnBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        oprnBtn.setText("(");
        oprnBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                oprnBtnActionPerformed(evt);
            }
        });

        jLabel1.setFont(new java.awt.Font("Segoe UI", 3, 24)); // NOI18N
        jLabel1.setForeground(new java.awt.Color(153, 0, 153));
        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel1.setText("CALCULATOR");

        labelSymbol.setFont(new java.awt.Font("Segoe UI", 1, 12)); // NOI18N
        labelSymbol.setForeground(new java.awt.Color(255, 0, 51));
        labelSymbol.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        labelSymbol.setToolTipText("");

        closeBtn.setFont(new java.awt.Font("Segoe UI", 1, 20)); // NOI18N
        closeBtn.setText(")");
        closeBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                closeBtnActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                            .addContainerGap()
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                .addGroup(layout.createSequentialGroup()
                                    .addComponent(zeroBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addGap(18, 18, 18)
                                    .addComponent(oprnBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                    .addComponent(closeBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                    .addComponent(equalBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE))
                                .addGroup(layout.createSequentialGroup()
                                    .addComponent(sevenBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                    .addComponent(eightBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                    .addComponent(nineBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addGap(18, 18, 18)
                                    .addComponent(minusBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE))
                                .addGroup(layout.createSequentialGroup()
                                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                        .addGroup(layout.createSequentialGroup()
                                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                .addComponent(jRadioButton2)
                                                .addComponent(jRadioButton1))
                                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                            .addComponent(delBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                            .addGap(18, 18, 18)
                                            .addComponent(clearBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE))
                                        .addGroup(layout.createSequentialGroup()
                                            .addComponent(fourBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                            .addComponent(fiveBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                            .addComponent(sixBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE))
                                        .addGroup(layout.createSequentialGroup()
                                            .addComponent(oneBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                            .addGap(18, 18, 18)
                                            .addComponent(twoBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                            .addComponent(threeBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)))
                                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                        .addGroup(layout.createSequentialGroup()
                                            .addGap(13, 13, 13)
                                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                .addComponent(multBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                .addComponent(plusBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)))
                                        .addGroup(layout.createSequentialGroup()
                                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                            .addComponent(divideBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE))))
                                .addComponent(outputField)))
                        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                            .addContainerGap()
                            .addComponent(labelSymbol, javax.swing.GroupLayout.PREFERRED_SIZE, 144, javax.swing.GroupLayout.PREFERRED_SIZE)))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(49, 49, 49)
                        .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 166, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(14, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 27, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(labelSymbol, javax.swing.GroupLayout.PREFERRED_SIZE, 14, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(outputField, javax.swing.GroupLayout.PREFERRED_SIZE, 37, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jRadioButton1)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jRadioButton2))
                    .addComponent(delBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(clearBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(plusBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(sevenBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(eightBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(nineBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(minusBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(fiveBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(fourBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(sixBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(multBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(divideBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(oneBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(twoBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(threeBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(zeroBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(oprnBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(equalBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(closeBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void sevenBtnActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        outputField.setText(outputField.getText()+"7");
    }                                        

    private void sixBtnActionPerformed(java.awt.event.ActionEvent evt) {                                       
        // TODO add your handling code here:
        outputField.setText(outputField.getText()+"6");
    }                                      

    private void oneBtnActionPerformed(java.awt.event.ActionEvent evt) {                                       
        // TODO add your handling code here:
        outputField.setText(outputField.getText()+"1");
    }                                      

    private void eightBtnActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        outputField.setText(outputField.getText()+"8");
    }                                        

    private void fourBtnActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        outputField.setText(outputField.getText()+"4");
    }                                       

    private void fiveBtnActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        outputField.setText(outputField.getText()+"5");
    }                                       

    private void multBtnActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        //num = Double.parseDouble(outputField.getText());
        //calculation = 3;
        //outputField.setText("");
        outputField.setText(outputField.getText()+"*");
        labelSymbol.setText("*");
        
    }                                       

    private void twoBtnActionPerformed(java.awt.event.ActionEvent evt) {                                       
        // TODO add your handling code here:
        outputField.setText(outputField.getText()+"2");
    }                                      

    private void nineBtnActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        outputField.setText(outputField.getText()+"9");
    }                                       

    private void minusBtnActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        //num = Double.parseDouble(outputField.getText());
        outputField.setText(outputField.getText()+"-");
       // calculation = 2;
       // outputField.setText("");
        labelSymbol.setText("-");
        
    }                                        

    private void divideBtnActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
       // num = Double.parseDouble(outputField.getText());
       // calculation = 4;
       // outputField.setText("");
       outputField.setText(outputField.getText()+"/");
        labelSymbol.setText("/");
        
    }                                         

    private void threeBtnActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        outputField.setText(outputField.getText()+"3");
    }                                        

    private void zeroBtnActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        outputField.setText(outputField.getText()+"0");
    }                                       

    private void equalBtnActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        String c = outputField.getText();
        if(c.equals(""))
        {
            JOptionPane.showMessageDialog(null,"Please provide some value!");
        }
        else{
              //Calculations();
              String exp = outputField.getText();
              int result = EvaluateString.evaluate(exp);
              labelSymbol.setText("Result is round off");
              outputField.setText(""+result);
        }
       
        
    }                                        

    private void oprnBtnActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        
        outputField.setText(outputField.getText()+"(");
        labelSymbol.setText("(");
        
       /* String check = outputField.getText();
        boolean con = false;
        for(int i = 0;i<check.length();i++)
        {
            if(Character.toString(check.charAt(i)).equals("."))
            {
                con = true;
                break;
            }
        }
        if (con)
        {
            JOptionPane.showMessageDialog(null, "Decimal point already exist!");
        }
        else
        {
            outputField.setText(outputField.getText()+".");
        }*/
    }                                       

    private void plusBtnActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        //num = Double.parseDouble(outputField.getText());
        outputField.setText(outputField.getText()+"+");
        //calculation = 1;
        //outputField.setText("");
        labelSymbol.setText("+");
        
    }                                       

    private void clearBtnActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        outputField.setText("");
    }                                        

    private void jRadioButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                              
        // TODO add your handling code here:
        off();
    }                                             

    private void jRadioButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                              
        // TODO add your handling code here:
        
        on();
    }                                             

    private void delBtnActionPerformed(java.awt.event.ActionEvent evt) {                                       
        // TODO add your handling code here:
        
        int length = outputField.getText().length();
        int lastIndex = outputField.getText().length()-1;
        
        String store;
        
        if (length > 0)
        {
            StringBuilder back = new StringBuilder(outputField.getText());
            back.deleteCharAt(lastIndex);
            store = back.toString();
            outputField.setText(store);
        }
       
        
    }                                      

    private void closeBtnActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
         outputField.setText(outputField.getText()+")");
        labelSymbol.setText(")");
    }                                        

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(calculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(calculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(calculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(calculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new calculator().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.ButtonGroup buttonGroup1;
    private javax.swing.JButton clearBtn;
    private javax.swing.JButton closeBtn;
    private javax.swing.JButton delBtn;
    private javax.swing.JButton divideBtn;
    private javax.swing.JButton eightBtn;
    private javax.swing.JButton equalBtn;
    private javax.swing.JButton fiveBtn;
    private javax.swing.JButton fourBtn;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JRadioButton jRadioButton1;
    private javax.swing.JRadioButton jRadioButton2;
    private javax.swing.JLabel labelSymbol;
    private javax.swing.JButton minusBtn;
    private javax.swing.JButton multBtn;
    private javax.swing.JButton nineBtn;
    private javax.swing.JButton oneBtn;
    private javax.swing.JButton oprnBtn;
    private javax.swing.JTextField outputField;
    private javax.swing.JButton plusBtn;
    private javax.swing.JButton sevenBtn;
    private javax.swing.JButton sixBtn;
    private javax.swing.JButton threeBtn;
    private javax.swing.JButton twoBtn;
    private javax.swing.JButton zeroBtn;
    // End of variables declaration                   
}