Java语言程序设计教程（魏永红版）第8章课本源码-创新互联

【例8.1】通过继承JFrame类定义窗体。

import javax.swing.*;
public class JFrameDemo extends JFrame {
	public JFrameDemo(boolean b) {
		this.setTitle("自定义窗体");
		this.setBounds(80,80,300,200);
		this.setResizable(b);
		this.setVisible(true);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
	}
	public static void main(String[] args) {
		JFrame frame = new JFrameDemo(false);
	}
}

【例8.4】创建JTextArea文本域组件，并将其放入滚动面板JScrollPane中，最后将滚动面板加入窗体容器中。

import javax.swing.*;
public class JScrollPaneDemo {
	public static void main(String[] args) {
		JFrame jf = new JFrame("JScrollPane应用实例");
		JTextArea ta = new JTextArea("带滚动条的面板演示实例！！！");
		JScrollPane sp = new JScrollPane(ta);
		jf.add(sp);
		jf.setSize(300,200);
		jf.setVisible(true);
		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

【例8.5】创建水平方向分隔面板outerPane和垂直方向分隔面板interPane，并将inter-Pane设置为outerPane面板的右边部分，同时设置分隔条的初始位置和大小。

import javax.swing.*;
public class JSplitPaneDemo extends JFrame{
    private JSplitPane outerPane,interPane;
    public JSplitPaneDemo(){
        outerPane =new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,true);
        outerPane.setOneTouchExpandable(true);
        interPane =new JSplitPane(JSplitPane.VERTICAL_SPLIT);
        interPane.setOneTouchExpandable(true);
        interPane.setLeftComponent(new JLabel("右上窗格"));
        interPane.setRightComponent(new JLabel("右下窗格"));
        outerPane.setLeftComponent(new JLabel("左边窗格"));
        outerPane.setRightComponent(interPane);
        outerPane.setDividerLocation(60);
        interPane.setDividerLocation(70);
        outerPane.setDividerSize(10);
        interPane.setDividerSize(10);
        this.add(outerPane);
        this.setTitle("分隔面板应用");
        this.setSize(300,200);
        this.setVisible(true);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public static void main(String[]args)
    {
        new JSplitPaneDemo();
    }
}

【例8.6】使用FlowLayout布局管理器布局JFrame组件中的5个按钮。

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

public class FlowLayoutDemo extends JFrame{
	public static void main(String[] args) {
		JFrame frame = new JFrame("流布局管理器");
		FlowLayout flowLayout = new FlowLayout(FlowLayout.RIGHT);
		flowLayout.setHgap(10);
		flowLayout.setVgap(20);
		frame.setLayout(flowLayout);
		for(int i = 1;i<= 5;i++) {
			frame.add(new JButton("Button" + i));
			frame.setSize(400,200);
			frame.setVisible(true);
			frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			
		}
	}
}

【例8.7】按照BorderLayout布局管理器在JFrame窗体中放置5个按钮。

import java.awt.*;
import javax.swing.*;
public class BorderLayoutDemo extends JFrame {
	public BorderLayoutDemo() {
		super("BorderLayout布局管理器");
		BorderLayout layout = new BorderLayout(5,5);
		this.setLayout(layout);
		JButton buttonEast = new JButton("东");
		JButton buttonWest = new JButton("西");
		JButton buttonSouth = new JButton("南");
		JButton buttonNorth = new JButton("北");
		JButton buttonCenter = new JButton("中");
		this.add(buttonNorth , BorderLayout.NORTH);
		this.add(buttonSouth , BorderLayout.SOUTH);
		this.add(buttonEast , BorderLayout.EAST);
		this.add(buttonWest , BorderLayout.WEST);
		this.add(buttonCenter , BorderLayout.CENTER);
		this.setSize(300 , 200);
		this.setVisible(true);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
	}
	public static void main(String[] args) {
		BorderLayoutDemo application = new BorderLayoutDemo();
	}
}

【例8.8】按GridLayout布局管理器部署JFrame窗体中6个按钮。

import java.awt.*;
import javax.swing.*;
public class GridLayoutDemo extends JFrame {
	private final String names[] = {"one" , "two" , "three" , 
			"four" , "five" , "six"};
	public GridLayoutDemo() {
		super("GridLayout布局管理器");
		GridLayout grid1 = new GridLayout(2,2,5,5);
		this.setLayout(grid1);
		JButton buttons[] = new JButton[names.length];
		for(int count = 0;count< names.length;count++) {
			buttons[count] = new JButton(names[count]);
			this.add(buttons[count]);
		}
		this.setSize(300,150);
		this.setVisible(true);
	}
	public static void main(String args[]) {
		GridLayoutDemo application = new GridLayoutDemo();
		application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

【例8.9】在JFrame中创建cardPanel和controlPanel两个JPanel容器，并使用默认布局管理器将它们分别部署到“Center”和“South”区域。cardPanel容器的布局管理器设置为CardLayout，部署4个按钮组件；controlPanel容器的布局管理器采用默认，部署两个按钮组件。

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class CardLayoutDemo extends JFrame {
		private CardLayout cardLayout;
		private JPanel cardPanel;
		public CardLayoutDemo() {
			super("CardLayout布局管理器");
			cardPanel = new JPanel();
			cardLayout = new CardLayout(10,10);
			cardPanel.setLayout(cardLayout);
			for(int i = 1;i<= 4;i++) {
				cardPanel.add("button" + i , new JButton("button" + i));
			}
			this.add(cardPanel , BorderLayout.CENTER);
			JButton nextButton = new JButton("Next");
			JButton prevButton = new JButton("Previous");
			nextButton.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					cardLayout.previous(cardPanel);
				}
			});
			prevButton.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					cardLayout.previous(cardPanel);
				}
			});
			JPanel controlPanel = new JPanel();
			controlPanel.add(prevButton);
			controlPanel.add(nextButton);
			this.add(controlPanel , BorderLayout.SOUTH);
			
	}
		public static void main(String[] args) {
			CardLayoutDemo cardDemo = new CardLayoutDemo();
			cardDemo.setSize(300,200);
			cardDemo.setVisible(true);
			cardDemo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			
		}
}

【例8.12】本例以窗口JFrame作为事件源演示WindowEvent事件处理。

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class WindowEventDemo extends JFrame implements WindowConstants{
    public WindowEventDemo(){
        super("WindowEvent处理应用");
        this.setSize(300,200);
        this.setVisible(true);
            this.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
    }
    public void windowActivated(WindowEvent e){
        System.out.println("This window is activated.");
    }
    public void windowClosed(WindowEvent e){
        System.out.println("This window has closed.");
        System.exit(0);
    }
    public void windowClosing(WindowEvent e) {
        System.out.println("This window is closing now.");
        this.dispose();
    }
    public void windowDeactivated(WindowEvent e){
        System.out.println("This window is deactivated");
    }
    public void windowDeiconified(WindowEvent e){
        System.out.println("This window is deiconified");
    }
    public void windowIconified(WindowEvent e){
        System.out.println("This window is iconified");
    }
    public void windowOpened(WindowEvent e){
        System.out.println("This window is opened");
    }
    public static void main(String[] args){
        new WindowEventDemo();
    }
}

【例8.13】以JTextArea组件作为产生KeyEvent事件的事件源的键盘事件处理程序。

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


public class KeyEventDemo extends JFrame implements KeyListener {
    private  JTextField tf;
    public KeyEventDemo(){
        super("KeyEvent处理应用");
        tf=new JTextField(15);
        tf.addKeyListener(this);
        JPanel panel=new JPanel();
        panel.add(new JLabel("输入框"));
        panel.add(tf);
        this.add(panel,BorderLayout.CENTER);
        this.setSize(300,80);
        this.setVisible(true);
    }
    public void keyPressed(KeyEvent e){}
    public void keyRelesased(KeyEvent e){}
    public void keyTyped(KeyEvent e){
        System.out.println(e.getKeyChar());
    }
    public static void main(String[] args){
        new KeyEventDemo();
    }
}

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