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Krocker

Mon Dec 19, 2011 5:58 pm


Button Help

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Hey guys, im trying to make a computer cleaning software that deletes specific files specified within the program. I made a basic interface with only 2 buttons for now, but i need help positioning it and making the buttons do something when clicked. im really new to this so please be specific:


[code]
import java.awt.*;
import java.awt.event.*;

public class ButtonText
{
    public static void main (String[] args)
    {


        Frame frame = new Frame ("KCleaner");
        Button button1 = new Button ("Clean");
        frame.add (button1);
        Button button2 = new Button ("About");
        frame.add (button2);
        frame.setLayout (new FlowLayout ());
        frame.setSize (300, 100);
        frame.setVisible (true);
        frame.addWindowListener (new WindowAdapter ()
        {
            public void windowClosing (WindowEvent e)
            {
                System.exit (0);
            }
        }
        );
    }
}
[/code]


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randint

Fri Dec 30, 2011 10:18 pm


Re: Button Help

-----------------------------------

Well, you can use the setBounds(int x, int y, int width, int height) to position your buttons within the JFrame, as for how to make the buttons do something, you need:
a constructor (some method that has the same name, same case that the class does) and some ActionListener objects, for example:

import java.awt.event.*;
import javax.swing.*;
public class Test extends JFrame implements ActionListener
{
   public JFrame f1 = new JFrame ("Frame");
   public JPanel p1 = new JPanel ();
   public JButton b1 = new JButton ("Button 1");
   public JButton b2 = new JButton ("Button 2");
   public Test ()
   {
      b1.addActionListener(this);
      b2.addActionListener(this);
      f1.setContentPane(p1);
      f1.setSize(400, 400);
      p1.add (b1);
      p1.add(b2);
      f1.setVisible (true);
   }
   public void actionPerformed (ActionEvent e)
   {
      if (e.getSource () == b1)
      {
         JOptionPane.showMessageDialog (null, "Button 1 is clicked!");
      }
      else if (e.getSource () == b2)
      {
         JOptionPane.showMessageDialog(null, "Button 2 is clicked");
      }
   }
   public static void main (String args
So, there needs to be a void method named "actionPerformed" with parameter ActionPerformed e (it has to be that way, otherwise there WILL be a SYNTAX ERROR), then use the getSource() method to respond to mouse events (clicks) that are "listened" by ActionListener.


-----------------------------------

Velocity

Wed Jan 11, 2012 11:33 am


Re: Button Help

-----------------------------------

import java.awt.event.*; 
import javax.swing.*; 
public class Test extends JFrame implements ActionListener 
{ 
   public JFrame f1 = new JFrame ("Frame"); 
   public JPanel p1 = new JPanel (); 
   public JButton b1 = new JButton ("Button 1"); 
   public JButton b2 = new JButton ("Button 2"); 
   public Test () 
   { 
      b1.addActionListener(this); 
      b2.addActionListener(this); 
      f1.setContentPane(p1); 
      f1.setSize(400, 400); 
      p1.add (b1); 
      p1.add(b2); 
      f1.setVisible (true); 
   } 
   public void actionPerformed (ActionEvent e) 
   { 
      if (e.getSource () == b1) 
      { 
         JOptionPane.showMessageDialog (null, "button one was pressed");
      }
      if (e.getSource () == b2)
      }
         JOptionPane.showMessageDialog (null, "button two was pressed");
      {
      return (value) 0 + (newValue);
      System.out ("pause")
}

is a true statement ^^^^