java help with codes (please)..

A

anirtak143

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hey guys. i need help here.. ^^ kindly fix this class for me.. ^^ its just a small java program, but it wont compile and i dont know why.. kindly fix it please. ^^

thanks. heres the code..

Code: 
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class Project2 implements ActionListener{
    private JFrame MainFrame;
    private JTextField TF1;
    private JLabel Label1, Label2;
    private JPanel Panel1, Panel2, Panel3, Panel4, Panel5;
    private JButton AddButton, SubtractButton, MultiplyButton, DivideButton, ModuloButton,EqualsButton;
    private double D1 = 0, D2;
    private char OpDone = 'e';
    private String UserInput;

public static void main(String[] args)
{ new Project2();
}

public Project2{
    MainFrame = new JFrame("Kevin Mabul's Calculator");
    
    Panel1 = new JPanel();
    Panel2 = new JPanel();
    Panel3 = new JPanel();
    Panel4 = new JPanel();
    Panel5 = new JPanel();
    
    Label1 = new JLabel("Patience is a virtue");
    Label2 = new JLabel("Java is a versatile language");
    
    AddButton = new JButton("+");
    AddButton.addActionListener(this);
    SubtractButton = new JButton("-");
    SubtractButton.addActionListener(this);
    MultiplyButton = new JButton("x");
    MultiplyButton.addActionListener(this);
    DivideButton = new JButton("/");
    DivideButton.addActionListener(this);
    ModuloButton = new JButton("%");
    ModuloButton.addActionListener(this);
    EqualsButton = new JButton("=");
    EqualsButton.addActionListener(this);
    
    TF1 = new JTextField("0",15);
    TF1.selectAll();
    TF1.requestFocus();
    
    Panel1.setBackground(Color.YELLOW);
    Panel2.setBackground(Color.GREEN);
    Panel3.setBackground(Color.GREEN);
    Panel4.setBackground(Color.YELLOW);
    
    Panel1.add(Label1);
    Panel2.add(Label2);
    Panel3.add(TF1);
    
    Panel5.add(Panel1);
    Panel5.add(Panel2);
    Panel5.add(Panel3);
    Panel5.add(Panel4);
    
    Panel4.add(AddButton);
    Panel4.add(SubtractButton);
    Panel4.add(MultiplyButton);
    Panel4.add(DivideButton);
    Panel4.add(ModuloButton);
    Panel4.add(EqualsButton);
    
    Panel5.setLayout(new GridLayout(4,1);
    
    MainFrame.setContentPane(Panel5);
    MainFrame.pack();
    MainFrame.show();
    MainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public void actionPerformed(ActionEvent e){
    {
        UserInput = TF1.getText();
        double D2 = Double.parseDouble(UserInput);
        
        {
            if(OpDone =='a')
            D1 = D1 + D2;
            
            if(OpDone =='s')
            D1 = D1 - D2;
            
            if(OpDone =='m')
            D1 = D1 * D2;
            
            if(OpDone =='d')
            D1 = D1 / D2;
            
            if(OpDone =='r')
            D1 = D1 % D2;
            
            if(OpDone =='e')
            D1 = D2;
        }
        
        if(e.getActionCommand().equals("+"))
        OpDone = 'a';
        if(e.getActionCommand().equals("-"))
        OpDone = 's';
        if(e.getActionCommand().equals("x"))
        OpDone = 'm';
        if(e.getActionCommand().equals("/"))
        OpDone = 'd';
        if(e.getActionCommand().equals("%"))
        OpDone = 'r';
        if(e.getActionCommand().equals("="))
        OpDone = 'e';
        
    }
    UserInput = Double.toString(D1);
    TF1.setText(UserInput);
    TF1.selectAll();
    TF1.requestFocus();
}
}
 
xmakina

xmakina

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In the nicest possible way, do your own damn homework.

And next time you have some Real Java code that doesn't compile, tell us the compile error since we don't want to have to read your whole script when it's probably just a semicolon that anyone who can read debug messages will know in a second where to look.
 
natsuki

natsuki

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woah that IS Java and it's waay different from javascript(ECMAScript). Dunno much who knows any java here... that's not even a script it's a complete oo code for an app..
 
Last edited:
leafypiggy

leafypiggy

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ever heard of

Code: 
System.exit( 0 );

lol
 
L

ldtwo

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First, I recommend netbeans if you aren't using it. Second, you will get much better elp in a java forum. Third, you should state what error you are getting and what line. Use the console, output feedback to discover errors and catch errors you expect to happen and then output more data to help you track the origin of the errors.
 
H

Harry

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Error 1 : missing paranthesis
Panel5.setLayout(new GridLayout(4,1));

Error 2 : wrong constructor syntax (without paranthesis)
public Project2()

Complete code
Code: 
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class Project2 implements ActionListener{
    private JFrame MainFrame;
    private JTextField TF1;
    private JLabel Label1, Label2;
    private JPanel Panel1, Panel2, Panel3, Panel4, Panel5;
    private JButton AddButton, SubtractButton, MultiplyButton, DivideButton, ModuloButton,EqualsButton;
    private double D1 = 0, D2;
    private char OpDone = 'e';
    private String UserInput;

public static void main(String[] args)
{ new Project2();
}

public Project2(){
    MainFrame = new JFrame("Kevin Mabul's Calculator");
    
    Panel1 = new JPanel();
    Panel2 = new JPanel();
    Panel3 = new JPanel();
    Panel4 = new JPanel();
    Panel5 = new JPanel();
    
    Label1 = new JLabel("Patience is a virtue");
    Label2 = new JLabel("Java is a versatile language");
    
    AddButton = new JButton("+");
    AddButton.addActionListener(this);
    SubtractButton = new JButton("-");
    SubtractButton.addActionListener(this);
    MultiplyButton = new JButton("x");
    MultiplyButton.addActionListener(this);
    DivideButton = new JButton("/");
    DivideButton.addActionListener(this);
    ModuloButton = new JButton("%");
    ModuloButton.addActionListener(this);
    EqualsButton = new JButton("=");
    EqualsButton.addActionListener(this);
    
    TF1 = new JTextField("0",15);
    TF1.selectAll();
    TF1.requestFocus();
    
    Panel1.setBackground(Color.YELLOW);
    Panel2.setBackground(Color.GREEN);
    Panel3.setBackground(Color.GREEN);
    Panel4.setBackground(Color.YELLOW);
    
    Panel1.add(Label1);
    Panel2.add(Label2);
    Panel3.add(TF1);
    
    Panel5.add(Panel1);
    Panel5.add(Panel2);
    Panel5.add(Panel3);
    Panel5.add(Panel4);
    
    Panel4.add(AddButton);
    Panel4.add(SubtractButton);
    Panel4.add(MultiplyButton);
    Panel4.add(DivideButton);
    Panel4.add(ModuloButton);
    Panel4.add(EqualsButton);
    
    Panel5.setLayout(new GridLayout(4,1));
    
    MainFrame.setContentPane(Panel5);
    MainFrame.pack();
    MainFrame.show();
    MainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public void actionPerformed(ActionEvent e){
    {
        UserInput = TF1.getText();
        double D2 = Double.parseDouble(UserInput);
        
        {
            if(OpDone =='a')
            D1 = D1 + D2;
            
            if(OpDone =='s')
            D1 = D1 - D2;
            
            if(OpDone =='m')
            D1 = D1 * D2;
            
            if(OpDone =='d')
            D1 = D1 / D2;
            
            if(OpDone =='r')
            D1 = D1 % D2;
            
            if(OpDone =='e')
            D1 = D2;
        }
        
        if(e.getActionCommand().equals("+"))
        OpDone = 'a';
        if(e.getActionCommand().equals("-"))
        OpDone = 's';
        if(e.getActionCommand().equals("x"))
        OpDone = 'm';
        if(e.getActionCommand().equals("/"))
        OpDone = 'd';
        if(e.getActionCommand().equals("%"))
        OpDone = 'r';
        if(e.getActionCommand().equals("="))
        OpDone = 'e';
        
    }
    UserInput = Double.toString(D1);
    TF1.setText(UserInput);
    TF1.selectAll();
    TF1.requestFocus();
}
}
 
A

anirtak143

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woah.. thanks harry... and to everyone, sorry i wasnt able to update this with the compile time error thing.. i was about to do it but this answer came.. thanks..

Error 1 : missing paranthesis
Panel5.setLayout(new GridLayout(4,1));

Error 2 : wrong constructor syntax (without paranthesis)
public Project2()
Click to expand...

i never knew it was this simple.. anyways, sorry for my stupidity..
 
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