紧急求助，如何做到一个界面中×掉某个单元

Question

用JSplitPane,点X的时候，设置那个JSplitPane的左右比例为0.0或1.0,分界线粗细为0
我做过，不过没有在那角上做按钮，是放在菜单里控制的。布局选用BorderLayout就会自动填充。

Answer 1

VC里实现方式是用ToolBar，但java的ToolBar没有关闭按钮的。

Answer 2

当然是在java里实现的，难道java就不能实现吗？

Answer 3

我上面说到用layout，下面是我刚才的实现，请看。**************   Application3.java    **************************package test;import javax.swing.UIManager;
import java.awt.*;/**
 * <p>Title: close or open</p>
 * <p>Description: dekn</p>
 * <p>Copyright: Copyright (c) dekn 2003</p>
 * <p>Company: dekn</p>
 * @author dekn
 * @version 1.0
 */public class Application3 {
  boolean packFrame = false;  //Construct the application
  public Application3() {
    Frame3 frame = new Frame3();
    //Validate frames that have preset sizes
    //Pack frames that have useful preferred size info, e.g. from their layout
    if (packFrame) {
      frame.pack();
    }
    else {
      frame.validate();
    }
    //Center the window
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if (frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
    frame.setVisible(true);
  }  //Main method
  public static void main(String[] args) {
    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    new Application3();
  }
}
**************   Application3.java    **************************package test;import java.awt.*;
import java.awt.event.*;
import javax.swing.*;/**
 * <p>Title: close or open</p>
 * <p>Description: dekn</p>
 * <p>Copyright: Copyright (c) dekn 2003</p>
 * <p>Company: dekn</p>
 * @author dekn
 * @version 1.0
 */public class Frame3 extends JFrame {
  JPanel contentPane;
  BorderLayout borderLayout1 = new BorderLayout();
  JPanel jPanel1 = new JPanel();
  JPanel jPanel2 = new JPanel();
  BorderLayout borderLayout2 = new BorderLayout();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  JPanel jPanel3 = new JPanel();
  JPanel jPanel4 = new JPanel();
  JPanel jPanel5 = new JPanel();
  BorderLayout borderLayout3 = new BorderLayout();
  JEditorPane jEditorPane1 = new JEditorPane();
  BorderLayout borderLayout4 = new BorderLayout();
  JButton jButton3 = new JButton();
  BorderLayout borderLayout5 = new BorderLayout();
  JTextArea jTextArea1 = new JTextArea();  //Construct the frame
  public Frame3() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(513, 379));
    this.setTitle("Frame Title");
    jPanel2.setLayout(borderLayout2);
    jButton1.setText("close");
    jButton1.addActionListener(new Frame3_jButton1_actionAdapter(this));
    jButton2.setText("open");
    jButton2.addActionListener(new Frame3_jButton2_actionAdapter(this));
    jPanel3.setPreferredSize(new Dimension(150, 10));
    jPanel3.setLayout(borderLayout3);
    jPanel4.setPreferredSize(new Dimension(150, 10));
    jPanel4.setLayout(borderLayout4);
    jEditorPane1.setBorder(BorderFactory.createLineBorder(Color.black));
    jEditorPane1.setText("jEditorPane1");
    jButton3.setText("jButton3");
    jPanel5.setLayout(borderLayout5);
    jTextArea1.setBorder(BorderFactory.createLoweredBevelBorder());
    jTextArea1.setText("jTextArea1");
    contentPane.add(jPanel1, BorderLayout.NORTH);
    jPanel1.add(jButton1, null);
    jPanel1.add(jButton2, null);
    contentPane.add(jPanel2, BorderLayout.CENTER);
    jPanel2.add(jPanel3, BorderLayout.WEST);
    jPanel3.add(jEditorPane1, BorderLayout.CENTER);
    jPanel2.add(jPanel4, BorderLayout.EAST);
    jPanel4.add(jButton3, BorderLayout.CENTER);
    jPanel2.add(jPanel5, BorderLayout.CENTER);
    jPanel5.add(jTextArea1, BorderLayout.CENTER);
  }  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }  /**
   * close方法
   * @param e ActionEvent
   */
  void jButton1_actionPerformed(ActionEvent e) {
    this.jPanel2.remove(this.jPanel4);
    this.jPanel2.repaint();
    this.jPanel2.paintAll(this.jPanel2.getGraphics());
  }  /**
   * open方法
   * @param e ActionEvent
   */
  void jButton2_actionPerformed(ActionEvent e) {
    jPanel2.add(jPanel4, BorderLayout.EAST);
    this.jPanel2.repaint();
    this.jPanel2.paintAll(this.jPanel2.getGraphics());
  }
}class Frame3_jButton1_actionAdapter implements java.awt.event.ActionListener {
  Frame3 adaptee;  Frame3_jButton1_actionAdapter(Frame3 adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}class Frame3_jButton2_actionAdapter implements java.awt.event.ActionListener {
  Frame3 adaptee;  Frame3_jButton2_actionAdapter(Frame3 adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton2_actionPerformed(e);
  }
}
上面的代码最重要的是：  /**
   * close方法
   * @param e ActionEvent
   */
  void jButton1_actionPerformed(ActionEvent e) {
    this.jPanel2.remove(this.jPanel4);
    this.jPanel2.repaint();
    this.jPanel2.paintAll(this.jPanel2.getGraphics());
  }  /**
   * open方法
   * @param e ActionEvent
   */
  void jButton2_actionPerformed(ActionEvent e) {
    jPanel2.add(jPanel4, BorderLayout.EAST);
    this.jPanel2.repaint();
    this.jPanel2.paintAll(this.jPanel2.getGraphics());
  }
我是用borderlayout布局实现的，当然，如果您很熟悉其它布局的话，您也可以试着用其它布局实现，用布局来实现这种效果很简单，但一些场合，还是建议您用MDI。
Dekn 2003-11-27

Answer 4

MDI？什么东西，windows+VC的概念（多文档）

Answer 5

oh sorry,上面第二个文件的名称是： Frame3.java