初学java的一些弱智问题..麻烦!

Question

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);
    }
}

Answer 1

LZ 用show()方法能显示出来?  
显示出来没大小 是因为LZ把setSize() 方法放在显示方法之后了  2个方法换下位置就好了
那个事件 没看懂什么意思 什么分2部执行?

Answer 2

用SHOW()方法能显示出来.但只显示了背景色..里面的组件不显示..要全屏或拉下边框才显示里面的组件....
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);  
               }  
}  
就是这事件中..按下jButton3后先执行jButton2.setVisible(false);jButton4.setVisible(true);再按一下后才执行jButton3.setLocation(5,  143);jButton4.setLocation(5,  192);   要按两下才执行完四条代码..

Answer 3

帮你改了一下 你试试是不是要这个效果
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(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));
        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(jButton1, new XYConstraints(5, 68, 138, 56));
            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);
    }
}

Answer 4

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);
    }
}

Answer 5

啊!!谢谢你..就是要这种效果!..
但我想请问下为什么我的代码运行时..只显示背景颜色.不显示里面的组件啊?
==================================
我不知道你为什么能使用show()方法来显示窗口 好像show方法已经过期了  建议你使用setVisible(true);  
因为你把setSize()放到显示窗口后面了 所以显示不出来组件  2个语句换下位置就可以了

Answer 6

我不知道你为什么能使用show()方法来显示窗口  好像show方法已经过期了    建议你使用setVisible(true);      
因为你把setSize()放到显示窗口后面了  所以显示不出来组件    2个语句换下位置就可以了  
=======================================
哦哦...
还有问题就是
      public  void  jButton3_actionPerformed(ActionEvent  e)  {                 
                       jButton3.setLocation(5,  143);  
                       jButton2.setVisible(false);  
                       jButton4.setVisible(true);  
                       jButton4.setLocation(5,  192);  
       } 
为什么这段代码运行时会分两步执行??
问题较多..麻烦了..谢谢.