Swing编程基础 之五

按钮控件实例：

一、JButton

package cn.tl.buttontest;

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

public class Button1 {
    
    static final int WIDTH = 300;
    static final int HEIGHT = 200;

    public static void main(String[] args) {
        //创建顶层框架类（设置标题和框架大小）
        JFrame jf = new JFrame();
        jf.setSize(WIDTH, HEIGHT);
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.setTitle("welcome to java swing");
        //通过ToolKit类中的方法，将顶层框架放置到屏幕中央
        Toolkit kit = Toolkit.getDefaultToolkit();
        Dimension screenSize = kit.getScreenSize();
        int width = screenSize.width;
        int height = screenSize.height;
        int x = (width - WIDTH) / 2;
        int y = (height - HEIGHT) / 2;
        jf.setLocation(x, y);
        //添加两个按钮jb1,jb2
        JButton jb1=new JButton("是");
        JButton jb2=new JButton("否");
        Panel panel=new Panel();
        panel.add(jb1);
        panel.add(jb2);
        
        jf.add(panel);
        jf.show();//  //显示顶层框架类对象
    }
}

显示效果：

 

二、JRadioButton

package cn.tl.buttontest;

import java.awt.*;

import javax.swing.*;

public class Button2 {
    
    static final int WIDTH = 300;
    static final int HEIGHT = 200;

    public static void main(String[] args) {
        //创建顶层框架类（设置标题和框架大小）
        JFrame jf = new JFrame();
        jf.setSize(WIDTH, HEIGHT);
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.setTitle("welcome to java swing");
        //通过ToolKit类中的方法，将顶层框架放置到屏幕中央
        Toolkit kit = Toolkit.getDefaultToolkit();
        Dimension screenSize = kit.getScreenSize();
        int width = screenSize.width;
        int height = screenSize.height;
        int x = (width - WIDTH) / 2;
        int y = (height - HEIGHT) / 2;
        jf.setLocation(x, y);
        JRadioButton jr1 = new JRadioButton("忽略");                         
        JRadioButton jr2 = new JRadioButton("继续");                       
        JRadioButton jr3 = new JRadioButton("跳过");                         
        Panel p = new Panel();                                           
        //添加对象jr1,jr2,jr3到面板对象p里
        p.add(jr1); 
        p.add(jr2);
        p.add(jr3);
        jf.add(p, BorderLayout.SOUTH);                                     
        jf.show();                                                          
    }
}

显示效果：

三、JRadioButton、ButtonGroup

package cn.tl.buttontest;

import java.awt.*;

import javax.swing.*;

public class Button3 {
    
    static final int WIDTH = 300;
    static final int HEIGHT = 200;

    public static void main(String[] args) {
        //创建顶层框架类（设置标题和框架大小）
        JFrame jf = new JFrame();
        jf.setSize(WIDTH, HEIGHT);
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.setTitle("welcome to java swing");
        //通过ToolKit类中的方法，将顶层框架放置到屏幕中央
        Toolkit kit = Toolkit.getDefaultToolkit();
        Dimension screenSize = kit.getScreenSize();
        int width = screenSize.width;
        int height = screenSize.height;
        int x = (width - WIDTH) / 2;
        int y = (height - HEIGHT) / 2;
        jf.setLocation(x, y);
        JRadioButton jr1 = new JRadioButton("忽略");
        JRadioButton jr2 = new JRadioButton("继续");
        JRadioButton jr3 = new JRadioButton("跳过");
        ButtonGroup bg = new ButtonGroup();                                 //创建一个按钮组对象bg
        Panel p = new Panel();                                           
        //添加三个 单选按钮jr1,jr2和jr3到按钮组对象bg
        bg.add(jr1);
        bg.add(jr2);
        bg.add(jr3);
        //添加三个 单选按钮jr1,jr2和jr3到面板组对象p    
        p.add(jr1);
        p.add(jr2);
        p.add(jr3);
        jf.add(p, BorderLayout.SOUTH);                     
        jf.show();                                         
    }
}

显示效果：

四、JToggleButton

package cn.tl.buttontest;

import java.awt.*;

import javax.swing.*;

public class Button4 {

    static final int WIDTH = 300;
    static final int HEIGHT = 200;

    public static void main(String[] args) {
        // 创建顶层框架类（设置标题和框架大小）
        JFrame jf = new JFrame();
        jf.setSize(WIDTH, HEIGHT);
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.setTitle("welcome to java swing");
        // 通过ToolKit类中的方法，将顶层框架放置到屏幕中央
        Toolkit kit = Toolkit.getDefaultToolkit();
        Dimension screenSize = kit.getScreenSize();
        int width = screenSize.width;
        int height = screenSize.height;
        int x = (width - WIDTH) / 2;
        int y = (height - HEIGHT) / 2;
        jf.setLocation(x, y);
        JToggleButton jt1 = new JToggleButton("忽略");
        JToggleButton jt2 = new JToggleButton("继续");
        JToggleButton jt3 = new JToggleButton("跳过");
        Panel p = new Panel();
        p.add(jt1);
        p.add(jt2);
        p.add(jt3);
        jf.add(p, BorderLayout.SOUTH);
        jf.show();
    }
}

显示效果：

文本控件实例：

JTextField jt = new JTextField(10);   

　

JPasswordField jp = new JPasswordField(10);  

　　

JTextArea jt = new JTextArea(5, 5); 

　5行5列；

　标签组件实例：

   JLabel jl=new JLabel("欢迎您",JLabel.RIGHT);  

   选择组件实例：

String[] a = new String[5];                   
		a[0] = "丽丽";
		a[1] = "米米";
		a[2] = "毛毛";
		a[3] = "妮妮";
		a[4] = "欢欢";
JComboBox jc = new JComboBox(a);                 

　　

显示效果：

菜单组件实例：

package com.cjgong.caidan;

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

public class Test{
    static final int WIDTH = 300;
    static final int HEIGHT = 200;

    public static void main(String[] args) {
        JFrame jf = new JFrame();
        jf.setSize(WIDTH, HEIGHT);
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.setTitle("记事本");
        Toolkit kit = Toolkit.getDefaultToolkit();
        Dimension screenSize = kit.getScreenSize();
        int width = screenSize.width;
        int height = screenSize.height;
        int x = (width - WIDTH) / 2;
        int y = (height - HEIGHT) / 2;
        jf.setLocation(x, y);

        JMenuBar menubar1 = new JMenuBar();
        jf.setJMenuBar(menubar1);                         

        JMenu menu1 = new JMenu("文件");
        JMenu menu2 = new JMenu("编辑");
        JMenu menu3 = new JMenu("视图");
        JMenu menu4 = new JMenu("帮助");

        menubar1.add(menu1);
        menubar1.add(menu2);
        menubar1.add(menu3);
    
        JMenuItem item1 = new JMenuItem("打开");
        JMenuItem item2 = new JMenuItem("保存");
        JMenuItem item3 = new JMenuItem("打印");
        JMenuItem item4 = new JMenuItem("退出");

        menu1.add(item1);
        menu1.add(item2);
        menu1.addSeparator();                            //添加分隔条
        menu1.add(item3);
        menu1.addSeparator();                            //添加分隔条
        menu1.add(item4);
        jf.show();
    }
}

显示效果：

对话框组件实例：

package com.cjgong.diag;

import java.awt.*;
import javax.swing.*;
public class Test  extends Frame 
{
    public static void main(String[] args)
    {
        JOptionPane.showConfirmDialog(null,"确定吗？","描述！",JOptionPane.YES_NO_CANCEL_OPTION);
    }
}

显示效果：