Applet中如何使用对话框

Question

JDialog dialog = new JDialog(frame);
它要有一个Frame作为父窗口，才能实现它没关的时候Frame用不了，如何让Applet也能实现这种效果

Answer 1

楼主可以先写一个applet，再写一个继承JDialog的类，在这个类的构造方法开头加上super (jFrame,"hihi",true)，其中true表示打开时父窗体停止运行最后在父窗体中加入      ClearAll ca = new ClearAll(new JFrame());
        ca.setBounds(300,300,480,150);
        ca.setVisible(true);JDialog的代码如下package epigraphdesign;import javax.swing.JComponent;
import javax.swing.*;
import java.awt.*;
import java.applet.Applet;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2006</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class ClearAll extends JDialog {    JPanel jPanel1 = new JPanel();
    JButton jButton1 = new JButton();
    JButton jButton2 = new JButton();
    JCheckBox jCheckBox1 = new JCheckBox();
    JCheckBox jCheckBox2 = new JCheckBox();
    JCheckBox jCheckBox3 = new JCheckBox();
    public ClearAll(JFrame jFrame) {
        super (jFrame,"hihi",true);
        try {
            jbInit();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }    private void jbInit() throws Exception {
        this.setResizable(false);
        this.setTitle("清空选项");
        this.setLayout(null);
        jPanel1.setBackground(SystemColor.inactiveCaption);
        jPanel1.setBorder(BorderFactory.createEtchedBorder());
        jPanel1.setBounds(new Rectangle(10, 10, 361, 100));
        jPanel1.setLayout(null);        jButton2.addActionListener(new ClearAll_jButton2_actionAdapter(this));
        jButton1.addActionListener(new ClearAll_jButton1_actionAdapter(this));
        this.add(jPanel1);
        jCheckBox2.setBackground(SystemColor.inactiveCaption);
        jCheckBox2.setFont(new java.awt.Font("新宋体", Font.PLAIN, 12));
        jCheckBox2.setText("清空背面");
        jCheckBox2.setBounds(new Rectangle(121, 35, 85, 23));
        jCheckBox3.setBackground(SystemColor.inactiveCaption);
        jCheckBox3.setFont(new java.awt.Font("新宋体", Font.PLAIN, 12));
        jCheckBox3.setText("清空");
        jCheckBox3.setBounds(new Rectangle(222, 36, 85, 23));
        jPanel1.add(jCheckBox1);
        jPanel1.add(jCheckBox2);
        jPanel1.add(jCheckBox3);
        jCheckBox1.setBackground(SystemColor.inactiveCaption);
        jCheckBox1.setFont(new java.awt.Font("新宋体", Font.PLAIN, 12));
        jCheckBox1.setBounds(new Rectangle(22, 35, 85, 23));
        jCheckBox1.setText("清空正面");
        jButton2.setBounds(new Rectangle(384, 70, 71, 30));
        jButton2.setFont(new java.awt.Font("新宋体", Font.PLAIN, 12));
        jButton2.setText("取消");
        this.add(jButton1);
        this.add(jButton2);
        jButton1.setBounds(new Rectangle(384, 22, 71, 30));
        jButton1.setFont(new java.awt.Font("新宋体", Font.PLAIN, 12));
        jButton1.setText("确定");
        jCheckBox1.setSelected(true);
        jCheckBox2.setSelected(true);
        jCheckBox3.setSelected(true);
    }    public void jButton2_actionPerformed(ActionEvent e) {
        this.setVisible(false);
    }    public void jButton1_actionPerformed(ActionEvent e) {
        this.setVisible(false);
        if(jCheckBox1.isSelected())   {EpiApp.clear(EpiApp.jPanel7);EpiApp.jPanel7.repaint();}
        if(jCheckBox2.isSelected())   {EpiApp.clear(EpiApp.jPanel8);EpiApp.jPanel8.repaint();}
        if(jCheckBox3.isSelected())   {EpiApp.clear(EpiApp.jPanel10);EpiApp.jPanel10.repaint();}
    }
}
class ClearAll_jButton2_actionAdapter implements ActionListener {
    private ClearAll adaptee;
    ClearAll_jButton2_actionAdapter(ClearAll adaptee) {
        this.adaptee = adaptee;
    }    public void actionPerformed(ActionEvent e) {
        adaptee.jButton2_actionPerformed(e);
    }
}
class ClearAll_jButton1_actionAdapter implements ActionListener {
    private ClearAll adaptee;
    ClearAll_jButton1_actionAdapter(ClearAll adaptee) {
        this.adaptee = adaptee;
    }    public void actionPerformed(ActionEvent e) {
        adaptee.jButton1_actionPerformed(e);
    }
}

Answer 2

Frame frame = (Frame)SwingUtilities.getAncestorOfClass(Frame.class, applet);
JDialog dialog = new JDialog(frame, "title", true);

Answer 3

不写有frame的构造器的对话框就就行了，照样弹出来。JDialog d = new JDialog();