0

i have to create a calculator (i'm a 12 year old) for the science fair. on textwrangler when i try to compile it :Expected end of line, etc. but found identifier.

here is my code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;

public class JavaCalculator extends JFrame {
    private JButton jbtNum1;
    private JButton jbtNum2;
    private JButton jbtNum3;
    private JButton jbtNum4;
    private JButton jbtNum5;
    private JButton jbtNum6;
    private JButton jbtNum7;
    private JButton jbtNum8;
    private JButton jbtNum9;
    private JButton jbtNum0;
    private JButton jbtEqual;
    private JButton jbtAdd;
    private JButton jbtSubtract;
    private JButton jbtMultiply;
    private JButton jbtDivide;
    private JButton jbtSolve;
    private JButton jbtClear;
    private double TEMP;
    private double SolveTEMP;
private JTextField jtfResult;

Boolean addBool = false ;
Boolean subBool = false ;
Boolean divBool = false ;
Boolean mulBool = false ;


String display = "";

public JavaCalculator() {
    JPanel p1 = new JPanel();
    p1.setLayout(new GridLayout(4, 3));
    p1.add(jbtNum1 = new JButton("1"));
    p1.add(jbtNum2 = new JButton("2"));
    p1.add(jbtNum3 = new JButton("3"));
    p1.add(jbtNum4 = new JButton("4"));
    p1.add(jbtNum5 = new JButton("5"));
    p1.add(jbtNum6 = new JButton("6"));
    p1.add(jbtNum7 = new JButton("7"));
    p1.add(jbtNum8 = new JButton("8"));
    p1.add(jbtNum9 = new JButton("9"));
    p1.add(jbtNum0 = new JButton("0"));
    p1.add(jbtClear = new JButton("C"));


    JPanel p2 = new JPanel();
    p2.setLayout(new FlowLayout());
    p2.add(jtfResult = new JTextField(20));
    jtfResult.setHorizontalAlignment(JTextField.RIGHT);
    jtfResult.setEditable(false);

            JPanel p3 = new JPanel();
            p3.setLayout(new GridLayout(5, 1));
            p3.add(jbtAdd = new JButton("+"));
            p3.add(jbtSubtract = new JButton("-"));
            p3.add(jbtMultiply = new JButton("*"));
            p3.add(jbtDivide = new JButton("/"));
            p3.add(jbtSolve = new JButton("="));

    JPanel p = new JPanel();
    p.setLayout(new GridLayout());
    p.add(p2, BorderLayout.NORTH);
    p.add(p1, BorderLayout.SOUTH);
    p.add(p3, BorderLayout.EAST);


    add(p);

    jbtNum1.addActionListener(new ListenToOne());
    jbtNum2.addActionListener(new ListenToTwo());
    jbtNum3.addActionListener(new ListenToThree());
    jbtNum4.addActionListener(new ListenToFour());
    jbtNum5.addActionListener(new ListenToFive());
    jbtNum6.addActionListener(new ListenToSix());
    jbtNum7.addActionListener(new ListenToSeven());
    jbtNum8.addActionListener(new ListenToEight());
    jbtNum9.addActionListener(new ListenToNine());
    jbtNum0.addActionListener(new ListenToZero());

    jbtAdd.addActionListener(new ListenToAdd());
    jbtSubtract.addActionListener(new ListenToSubtract());
    jbtMultiply.addActionListener(new ListenToMultiply());
    jbtDivide.addActionListener(new ListenToDivide());
    jbtSolve.addActionListener(new ListenToSolve());
    jbtClear.addActionListener(new ListenToClear());



} //JavaCaluclator()

class ListenToClear implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        //display = jtfResult.getText();
        jtfResult.setText("");
        addBool = false ;
        subBool = false ;
        mulBool = false ;
        divBool = false ;

        TEMP = 0;
        SolveTEMP =0 ;
    }
}

class ListenToOne implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        display = jtfResult.getText();
        jtfResult.setText(display + "1");
    }
}
class ListenToTwo implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        display = jtfResult.getText();
        jtfResult.setText(display + "2");
    }
}
class ListenToThree implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        display = jtfResult.getText();
        jtfResult.setText(display + "3");
    }
}
class ListenToFour implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        display = jtfResult.getText();
        jtfResult.setText(display + "4");
    }
}
class ListenToFive implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        display = jtfResult.getText();
        jtfResult.setText(display + "5");
    }
}
class ListenToSix implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        display = jtfResult.getText();
        jtfResult.setText(display + "6");
    }
}
class ListenToSeven implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        display = jtfResult.getText();
        jtfResult.setText(display + "7");
    }
}
class ListenToEight implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        display = jtfResult.getText();
        jtfResult.setText(display + "8");
    }
}
class ListenToNine implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        display = jtfResult.getText();
        jtfResult.setText(display + "9");
    }
}
class ListenToZero implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        display = jtfResult.getText();
        jtfResult.setText(display + "0");
    }
}

    class ListenToAdd implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        TEMP = Double.parseDouble(jtfResult.getText());
                    jtfResult.setText("");
                    addBool = true ;

    }
}
class ListenToSubtract implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        TEMP = Double.parseDouble(jtfResult.getText());
        jtfResult.setText("");
        subBool =true;
    }
}
class ListenToMultiply implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        TEMP = Double.parseDouble(jtfResult.getText());
        jtfResult.setText("");
        mulBool =true;

    }
}
class ListenToDivide implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        TEMP = Double.parseDouble(jtfResult.getText());
        jtfResult.setText("");
        divBool =true;
    }
}
class ListenToSolve implements ActionListener {
    public void actionPerformed(ActionEvent e) {
                    SolveTEMP = Double.parseDouble(  jtfResult.getText() );
                    if ( addBool == true  )
                        SolveTEMP = SolveTEMP + TEMP;

                    else if ( subBool == true  )
                        SolveTEMP = SolveTEMP - TEMP;
                    else if ( mulBool == true  )
                        SolveTEMP = SolveTEMP * TEMP;
                    else if ( divBool == true  )
                        SolveTEMP = SolveTEMP / TEMP;
        jtfResult.setText(  Double.toString( SolveTEMP ) );

        addBool = false ;
        subBool = false ;
        mulBool = false ;
        divBool = false ;


    }
}

public static void main(String[] args) {
    // TODO Auto-generated method stub
    JavaCalculator calc = new JavaCalculator();
    calc.pack();
    calc.setLocationRelativeTo(null);
            calc.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    calc.setVisible(true);
}

} //JavaCalculator

please help!

thanks!

Edited by pritaeas: Moved

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Last Post by radhakrishna.p
0

:Expected end of line, etc. but found identifier.

Please post the full text of the error message that shows the source line where the error happened.

0

code is perfect with some logical errors
i have done some modifications to your code here is your modified code

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JavaCalculator extends JFrame {
    private JButton jbtNum1,jbtNum2,jbtNum3,jbtNum4,jbtNum5;
    private JButton jbtNum6,jbtNum7,jbtNum8,jbtNum9,jbtNum0;
    private JButton jbtEqual,jbtAdd,jbtSubtract,jbtMultiply,jbtDivide,jbtSolve,jbtClear;
    private double TEMP,SolveTEMP;
    private JTextField jtfResult;
    Boolean addBool = false ;
    Boolean subBool = false ;
    Boolean divBool = false ;
    Boolean mulBool = false ;
    String display = "";
    public JavaCalculator() {
        JPanel p1 = new JPanel();
        p1.setLayout(new GridLayout(4, 3));
        p1.add(jbtNum1 = new JButton("1"));
        p1.add(jbtNum2 = new JButton("2"));
        p1.add(jbtNum3 = new JButton("3"));
        p1.add(jbtNum4 = new JButton("4"));
        p1.add(jbtNum5 = new JButton("5"));
        p1.add(jbtNum6 = new JButton("6"));
        p1.add(jbtNum7 = new JButton("7"));
        p1.add(jbtNum8 = new JButton("8"));
        p1.add(jbtNum9 = new JButton("9"));
        p1.add(jbtNum0 = new JButton("0"));
        p1.add(jbtClear = new JButton("C"));

        JPanel p2 = new JPanel();
        p2.setLayout(new FlowLayout());
        p2.add(jtfResult = new JTextField(20));
        jtfResult.setHorizontalAlignment(JTextField.RIGHT);
        jtfResult.setEditable(false);

        JPanel p3 = new JPanel();
        p3.setLayout(new GridLayout(5, 1));
        p3.add(jbtAdd = new JButton("+"));
        p3.add(jbtSubtract = new JButton("-"));
        p3.add(jbtMultiply = new JButton("*"));
        p3.add(jbtDivide = new JButton("/"));
        p3.add(jbtSolve = new JButton("="));

        JPanel p = new JPanel();
        p.setLayout(new GridLayout());
        p.add(p2, BorderLayout.NORTH);
        p.add(p1, BorderLayout.SOUTH);
        p.add(p3, BorderLayout.EAST);
        add(p);

        jbtNum1.addActionListener(new ListenToOne());
        jbtNum2.addActionListener(new ListenToTwo());
        jbtNum3.addActionListener(new ListenToThree());
        jbtNum4.addActionListener(new ListenToFour());
        jbtNum5.addActionListener(new ListenToFive());
        jbtNum6.addActionListener(new ListenToSix());
        jbtNum7.addActionListener(new ListenToSeven());
        jbtNum8.addActionListener(new ListenToEight());
        jbtNum9.addActionListener(new ListenToNine());
        jbtNum0.addActionListener(new ListenToZero());
        jbtAdd.addActionListener(new ListenToAdd());
        jbtSubtract.addActionListener(new ListenToSubtract());
        jbtMultiply.addActionListener(new ListenToMultiply());
        jbtDivide.addActionListener(new ListenToDivide());
        jbtSolve.addActionListener(new ListenToSolve());
        jbtClear.addActionListener(new ListenToClear());
    } //JavaCaluclator()

    class ListenToClear implements ActionListener {
            public void actionPerformed(ActionEvent e) {
                //display = jtfResult.getText();
                jtfResult.setText("");
                addBool = false ;
                subBool = false ;
                mulBool = false ;
                divBool = false ;
                TEMP = 0;
                SolveTEMP =0 ;
            }
    }
    class ListenToOne implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(SolveTEMP==0){      // changed here
                display = jtfResult.getText();
                jtfResult.setText(display + "1");
            }else{                
                jtfResult.setText("1");
            }

        }
    }
    class ListenToTwo implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(SolveTEMP==0){       // changed here
                display = jtfResult.getText();
                jtfResult.setText(display + "2");
            }else{
                jtfResult.setText("2");
            }
        }
    }
    class ListenToThree implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(SolveTEMP==0){       // changed here
                display = jtfResult.getText();
                jtfResult.setText(display + "3");
            }else{
                jtfResult.setText("3");
            }
        }
    }

    class ListenToFour implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(SolveTEMP==0){     // changed here
                display = jtfResult.getText();
                jtfResult.setText(display + "4");
            }else{
                jtfResult.setText("4");
            }
        }
    }

    class ListenToFive implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(SolveTEMP==0){       // changed here
                display = jtfResult.getText();
                jtfResult.setText(display + "5");
            }else{
                jtfResult.setText("5");
            }
        }
    }
    class ListenToSix implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(SolveTEMP==0){      // changed here
                display = jtfResult.getText();
                jtfResult.setText(display + "6");
            }else{
                jtfResult.setText("6");
            }            
        }
    }
    class ListenToSeven implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(SolveTEMP==0){       // changed here
                display = jtfResult.getText();
                jtfResult.setText(display + "7");
            }else{
                jtfResult.setText("7");
            }
        }
    }

    class ListenToEight implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(SolveTEMP==0){   // changed here
                display = jtfResult.getText();
                jtfResult.setText(display + "8");
            }else{
                jtfResult.setText("8");
            }
        }
    }
    class ListenToNine implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(SolveTEMP==0){  // changed here
                display = jtfResult.getText();
                jtfResult.setText(display + "9");
            }else{
                jtfResult.setText("9");
            }
        }
    }
    class ListenToZero implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(SolveTEMP==0){   // changed here
                display = jtfResult.getText();
                jtfResult.setText(display + "0");
            }else{
                jtfResult.setText("0");
            }            
        }
    }

    class ListenToAdd implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            try {
                if(!jtfResult.getText().equalsIgnoreCase("")){        // changed here
                    TEMP = Double.parseDouble(jtfResult.getText());
                    jtfResult.setText("");
                    addBool = true ;
                }else{

                }
            }catch(Exception e2){}
        }
    }
    class ListenToSubtract implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            try {
                if(!jtfResult.getText().equalsIgnoreCase("")){          // changed here
                    TEMP = Double.parseDouble(jtfResult.getText());
                    jtfResult.setText("");
                    subBool =true;
                }else{
                }
            }catch(Exception e2){}            
        }
    }
    class ListenToMultiply implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            try {
                if(!jtfResult.getText().equalsIgnoreCase("")){        // changed here
                    TEMP = Double.parseDouble(jtfResult.getText());
                    jtfResult.setText("");
                    mulBool =true;
                }else{}
            }catch(Exception e2){}
        }
    }

    class ListenToDivide implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            try {
                if(!jtfResult.getText().equalsIgnoreCase("")){
                    TEMP = Double.parseDouble(jtfResult.getText());
                    jtfResult.setText("");
                    divBool =true;
                }else{}
            }catch(Exception e2){}

        }
    }
    class ListenToSolve implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(jtfResult.getText().equalsIgnoreCase("")){

            }else{
                SolveTEMP = Double.parseDouble(jtfResult.getText());
                // chaged here for wrong caliculation values

                if ( addBool == true  )
                    SolveTEMP = TEMP+SolveTEMP;
                else if ( subBool == true  )
                    SolveTEMP = TEMP - SolveTEMP;    // change here  it giving worng subtraction values before
                else if ( mulBool == true  )
                    SolveTEMP = SolveTEMP * TEMP;
                else if ( divBool == true  )
                    SolveTEMP = TEMP/SolveTEMP;
                jtfResult.setText(Double.toString(SolveTEMP));
                addBool = false ;
                subBool = false ;
                mulBool = false ;
                divBool = false ;
                TEMP = 0;            // changed here
                //SolveTEMP = 0;       // changed here
            }
        }
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        JavaCalculator calc = new JavaCalculator();
        calc.pack();
        calc.setLocationRelativeTo(null);
        calc.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        calc.setVisible(true);
    }
}

nice attempt boy

happy coding

yours
radha krishna

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