Swing JWindow類

JWindow類是一個可以顯示但沒有標題欄或窗口管理按鈕的容器。

類聲明

以下是javax.swing.JWindow類的聲明 -

public class JWindow
   extends Window
      implements Accessible, RootPaneContainer

字段

以下是java.awt.Component類的字段 -

• protected AccessibleContext accessibleContext - 可訪問的上下文屬性。
• protected JRootPane rootPane - 管理此框架的contentPane和可選menuBar的JRootPane實例。
• protected boolean rootPaneCheckingEnabled - 如果為true，則對add和setLayout的調用將轉發到contentPane。

類構造函數

類方法

方法繼承

該類繼承以下類中的方法 -

• java.awt.Window
• java.awt.Container
• java.awt.Component
• java.lang.Object

JWindow示例

使用編輯器創建以下Java程式：JWindowDemo.java

package com.zaixian.menu;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class JWindowDemo {
    private JFrame mainFrame;
    private JLabel headerLabel;
    private JLabel statusLabel;
    private JPanel controlPanel;
    private JLabel msglabel;

    public JWindowDemo() {
        prepareGUI();
    }

    public static void main(String[] args) {
        JWindowDemo swingContainerDemo = new JWindowDemo();
        swingContainerDemo.showJWindowDemo();
    }

    private void prepareGUI() {
        mainFrame = new JFrame("Java Swing JWindowDemo(xuhuhu.com)");
        mainFrame.setSize(400, 400);
        mainFrame.setLayout(new GridLayout(3, 1));

        mainFrame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent windowEvent) {
                System.exit(0);
            }
        });
        headerLabel = new JLabel("", JLabel.CENTER);
        statusLabel = new JLabel("", JLabel.CENTER);
        statusLabel.setSize(350, 100);

        msglabel = new JLabel("歡迎您來到許虎虎~", JLabel.CENTER);

        controlPanel = new JPanel();
        controlPanel.setLayout(new FlowLayout());

        mainFrame.add(headerLabel);
        mainFrame.add(controlPanel);
        mainFrame.add(statusLabel);
        mainFrame.setVisible(true);
    }

    private void showJWindowDemo() {
        headerLabel.setText("Container in action: JWindow");
        final MessageWindow window = new MessageWindow(mainFrame, "歡迎您來到許虎虎/Swing~");

        JButton okButton = new JButton("打開一個窗口");
        okButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                window.setVisible(true);
                statusLabel.setText("A Window shown to the user.");
            }
        });
        controlPanel.add(okButton);
        mainFrame.setVisible(true);
    }

    class MessageWindow extends JWindow {
        private String message;

        public MessageWindow(JFrame parent, String message) {
            super(parent);
            this.message = message;
            setSize(300, 300);
            setLocationRelativeTo(parent);
        }

        public void paint(Graphics g) {
            super.paint(g);
            g.drawRect(0, 0, getSize().width - 1, getSize().height - 1);
            g.drawString(message, 50, 150);
        }
    }
}

執行上面示例代碼，得到以下結果：

打開新的窗口如下：