Panel類 - AWT

類面板是最簡單的容器類。它提供了空間，在其中一個應用程序可以附加任何其他組件，包括其他面板。它使用的FlowLayout默認佈局manager.

類的聲明

以下是聲明的java.awt.Panel類：

public class Panel extends Container implements Accessible

類的構造函數

S.N.

構造函數與說明

Panel()
Creates a new panel using the default layout manager.

Panel(LayoutManager layout)
Creates a new panel with the specified layout manager.

類方法

S.N.

方法及說明

void addNotify()
Creates the Panel's peer.

AccessibleContext getAccessibleContext()
Gets the AccessibleContext associated with this Panel.

繼承的方法

This class inherits methods from the following classes:

java.awt.Container
java.awt.Component
java.lang.Object

Panel Example

Create the following java program using any editor of your choice in say D:/ > AWT > com > yiibai > gui >

AwtContainerDemo

package com.yiibai.gui; import java.awt.*; import java.awt.event.*; public class AwtContainerDemo { private Frame mainFrame; private Label headerLabel; private Label statusLabel; private Panel controlPanel; private Label msglabel; public AwtContainerDemo(){ prepareGUI(); } public static void main(String[] args){ AwtContainerDemo awtContainerDemo = new AwtContainerDemo(); awtContainerDemo.showPanelDemo(); } private void prepareGUI(){ mainFrame = new Frame("Java AWT Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); headerLabel = new Label(); headerLabel.setAlignment(Label.CENTER); statusLabel = new Label(); statusLabel.setAlignment(Label.CENTER); statusLabel.setSize(350,100); msglabel = new Label(); msglabel.setAlignment(Label.CENTER); msglabel.setText("Welcome to TutorialsPoint AWT Tutorial."); controlPanel = new Panel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private void showPanelDemo(){ headerLabel.setText("Container in action: Panel"); Panel panel = new Panel(); panel.setBackground(Color.magenta); panel.setLayout(new FlowLayout()); panel.add(msglabel); controlPanel.add(panel); mainFrame.setVisible(true); } }

Compile the program using command prompt. Go to D:/ > AWT and type the following command.

D:AWT>javac comyiibaiguiAwtContainerDemo.java

If no error comes that means compilation is successful. Run the program using following command.

D:AWT>java com.yiibai.gui.AwtContainerDemo

Verify the following output

AWT