初学java的一些弱智问题..麻烦!
在JBUILDER2006下运行下面的代码..为什么画面不会自动显示出来?要点下全屏或拉下边框才能显示...
还有..为什么在点jButton3时.响应的动作会分两步执行??
谢谢!!
import javax.swing.*;
import com.borland.jbcl.layout.XYLayout;
import com.borland.jbcl.layout.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.*;
import java.awt.event.MouseAdapter;

public class test2 extends JFrame {
public test2() {
try {
jbInit();
} catch (Exception ex) {
ex.printStackTrace();
}
}

public static void main(String[] args) {
test2 test2 = new test2();
}

private void jbInit() throws Exception {
this.getContentPane().setLayout(xYLayout1);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
show();
setSize(800, 600);
jButton1.setText( "jButton1 ");
jButton1.addActionListener(new test2_jButton1_actionAdapter(this));
jButton1.addMouseListener(new test2_jButton1_mouseAdapter(this));
jButton3.addMouseListener(new test2_jButton3_mouseAdapter(this));
jButton3.addActionListener(new test2_jButton3_actionAdapter(this));
this.getContentPane().add(jButton1, new XYConstraints(5, 68, 138, 56));
jButton4.setText( "jButton4 ");
jButton3.setText( "jButton3 ");
this.getContentPane().add(jButton2, new XYConstraints(5, 143, 98, 31));
this.getContentPane().add(jButton3, new XYConstraints(5, 192, 135, 53));
this.getContentPane().add(jButton4, new XYConstraints(5, 260, 96, 26));
jButton2.setText( "jButton2 ");
jButton4.setVisible(false);
}

XYLayout xYLayout1 = new XYLayout();
JButton jButton1 = new JButton();
JButton jButton2 = new JButton();

JButton jButton3 = new JButton();
JButton jButton4 = new JButton();


public void jButton1_actionPerformed(ActionEvent e) {
if(e.getActionCommand().equals( "jButton1 ")){
jButton3.setLocation(5, 192);
jButton2.setVisible(true);
jButton4.setVisible(false);
}

}

public void jButton3_actionPerformed(ActionEvent e) {
if(e.getActionCommand().equals( "jButton3 ")){
jButton3.setLocation(5, 143);
jButton2.setVisible(false);
jButton4.setVisible(true);
jButton4.setLocation(5, 192);
}
}

}


class test2_jButton1_mouseAdapter extends MouseAdapter {
private test2 adaptee;
test2_jButton1_mouseAdapter(test2 adaptee) {
this.adaptee = adaptee;
}
}


class test2_jButton1_actionAdapter implements ActionListener {
private test2 adaptee;
test2_jButton1_actionAdapter(test2 adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.jButton1_actionPerformed(e);
}
}


class test2_jButton3_mouseAdapter extends MouseAdapter {
private test2 adaptee;
test2_jButton3_mouseAdapter(test2 adaptee) {
this.adaptee = adaptee;
}
}


class test2_jButton3_actionAdapter implements ActionListener {
private test2 adaptee;
test2_jButton3_actionAdapter(test2 adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {

adaptee.jButton3_actionPerformed(e);
}
}


[解决办法]
上面那个 把jbutton1和jButton4弄反了 应该是下面这个 不好意思哈
这个就可以了
============================
package test2;

/**
* <p> Title: </p>
*
* <p> Description: </p>
*
* <p> Copyright: Copyright (c) 2007 </p>
*
* <p> Company: </p>
*
* @author not attributable
* @version 1.0
*/
import javax.swing.*;
import com.borland.jbcl.layout.XYLayout;
import com.borland.jbcl.layout.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.*;
import java.awt.event.MouseAdapter;

public class test2 extends JFrame {
public test2() {
try {
jbInit();
} catch (Exception ex) {
ex.printStackTrace();
}
}

public static void main(String[] args) {
test2 test2 = new test2();
}

private void jbInit() throws Exception {
this.getContentPane().setLayout(xYLayout1);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(800, 600);
this.setTitle( "***** ");
this.setVisible(true);
jButton1.setText( "jButton1 ");
jButton1.addActionListener(new test2_jButton1_actionAdapter(this));
jButton3.addActionListener(new test2_jButton3_actionAdapter(this));
this.getContentPane().add(jButton1, new XYConstraints(5, 68, 138, 56));
this.getContentPane().add(jButton2, new XYConstraints(5, 143, 98, 31));
this.getContentPane().add(jButton3, new XYConstraints(5, 192, 135, 53));

jButton4.setText( "jButton4 ");
jButton3.setText( "jButton3 ");
jButton2.setText( "jButton2 ");

}

XYLayout xYLayout1 = new XYLayout();
JButton jButton1 = new JButton();
JButton jButton2 = new JButton();
JButton jButton3 = new JButton();
JButton jButton4 = new JButton();


public void jButton1_actionPerformed(ActionEvent e) {
jButton3.setLocation(5, 192);
this.getContentPane().add(jButton2, new XYConstraints(5, 143, 98, 31));
this.remove(jButton4);
this.validate();
this.repaint();
}

public void jButton3_actionPerformed(ActionEvent e) {
this.getContentPane().add(jButton4, new XYConstraints(5, 260, 96, 26));
this.remove(jButton2);
this.validate();
this.repaint();
jButton3.setLocation(5, 143);
jButton4.setLocation(5, 192);
}

}


class test2_jButton1_actionAdapter implements ActionListener {
private test2 adaptee;
test2_jButton1_actionAdapter(test2 adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.jButton1_actionPerformed(e);
}
}

class test2_jButton3_actionAdapter implements ActionListener {
private test2 adaptee;
test2_jButton3_actionAdapter(test2 adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.jButton3_actionPerformed(e);
}
}