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小技巧:Java Swing中使用双击事件

 2008-01-05 18:00:21 来源:WEB开发网   
核心提示:直接在JBuilder中新建一个应用程序,至于具体步骤就不描述了,小技巧:Java Swing中使用双击事件,此代码没有main函数无法直接运行,下面我贴出在Frame1中的代码:import java.awt.*;import java.awt.event.*;import javax.swing.*;import

  直接在JBuilder中新建一个应用程序,至于具体步骤就不描述了,此代码没有main函数无法直接运行。下面我贴出在Frame1中的代码:
  
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    import com.borland.jbcl.layout.*;
    import java.util.Date;
    public class Frame1
    extends JFrame {
    JPanel contentPane;
    BorderLayout borderLayout1 = new BorderLayout();
    JPanel jPanel1 = new JPanel();
    XYLayout xYLayout1 = new XYLayout();
    JScrollPane jScrollPane1 = new JScrollPane();
    JList jList1 = new JList();
    //初始化的JList中的数据
    String[] strData = {
    "One", "Tow", "Three"};
    //保存点击按钮的时间
    long clickTime = 0;
  
    //ConstrUCt the frame
    public Frame1() {
    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(532, 468));
    this.setTitle("Frame Title");
  
    jPanel1.setLayout(xYLayout1);
    jList1.addMouseListener(new Frame1_jList1_mouseAdapter(this));
    contentPane.add(jPanel1, BorderLayout.CENTER);
    jPanel1.add(jScrollPane1, new XYConstraints(18, 34, 209, 326));
    jScrollPane1.getViewport().add(jList1, null);
    jList1.setListData(strData);
    }
  
    //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);
    }
    }
    //具体实现按钮双击的功能的方法, 很简单的算法,不做解释了
    public boolean checkClickTime() {
    long nowTime = (new Date()).getTime();
  
    if ( (nowTime - clickTime) < 300) {
    clickTime = nowTime;
    return true;
    }
    clickTime = nowTime;
    return false;
  
    }
  
    void jList1_mouseReleased(MouseEvent e) {
    //判定是否双击,是的话写你要实现的功能
    if (checkClickTime()) {
    System.out.println("Click Double");
  
    }
    }
    }
  
    class Frame1_jList1_mouseAdapter
    extends java.awt.event.MouseAdapter {
    Frame1 adaptee;
  
    Frame1_jList1_mouseAdapter(Frame1 adaptee) {
    this.adaptee = adaptee;
    }
  
    public void mouseReleased(MouseEvent e) {
    adaptee.jList1_mouseReleased(e);
    }
    }

Tags:技巧 Java Swing

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