java基础 常用组件

 1 package demo7;
 2 import java.awt.*;
 3 
 4 import javax.swing.*;
 5 
 6 /*
 7  * 多种布局管理器
 8  * */
 9 public class demo8 extends  JFrame{
10 
11     /**
12      * @param args
13      */
14     //定义 组件
15     JPanel jp1,jp2,jp3;
16     JLabel jlb1,jlb2;
17     JButton jb1,jb2;
18     JTextField jtf1,jtf2;
19     JPasswordField jpf1;
20     public static void main(String[] args) {
21         // TODO Auto-generated method stub
22         demo8 de =new demo8();
23     }
24 
25     //构造函数
26     public demo8()
27     {
28         jp1 = new JPanel();
29         jp2 = new JPanel();
30         jp3 = new JPanel();
31         
32         jlb1 = new JLabel("用户名");
33         jlb2 = new JLabel("密码");
34         jb1 =new JButton("登陆");
35         jb2 =new JButton("取消");
36         
37         jtf1 = new JTextField(10);
38         jpf1 = new JPasswordField(10);
39         
40         //设置布局管理器
41         this.setLayout(new GridLayout(3, 1));
42         
43         //加入各个组件
44         jp1.add(jlb1);
45         jp1.add(jtf1);
46         
47         jp2.add(jlb2);
48         jp2.add(jpf1);
49         
50         jp3.add(jb1);
51         jp3.add(jb2);
52         
53         //加入到jframe
54         this.add(jp1);
55         this.add(jp2);
56         this.add(jp3);
57         
58         this.setSize(300, 150);
59         this.setTitle("会员管理系统");
60         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
61         this.setVisible(true);
62     }
63 }

 1 /*
 2  * 单选框和复选框案例
 3  * */
 4 package demo7;
 5 
 6 import java.awt.*;
 7 
 8 import javax.swing.*;
 9 
10 public class demo9 extends JFrame{
11 
12     /**
13      * @param args
14      */
15 
16     //定义组件
17     JPanel jp1,jp2,jp3;
18     JLabel jl1,jl2;
19     JButton jb1,jb2;
20     JCheckBox jcb1,jcb2,jcb3;
21     JRadioButton jrb1,jrb2,jrb3;
22     ButtonGroup bg;
23     public static void main(String[] args) {
24         // TODO Auto-generated method stub
25         demo9 demo = new demo9();
26     }
27     
28     //构造函数
29     public demo9() 
30     {
31         //创建组件
32         jp1 = new JPanel();
33         jp2 = new JPanel();
34         jp3 = new JPanel();
35         jl1 = new JLabel("你喜欢的运动");
36         jl2 = new JLabel("你的性别");
37         jb1 = new JButton("注册用户");
38         jb2 = new JButton("取消注册");
39         
40         jcb1 = new JCheckBox("足球");
41         jcb2 = new JCheckBox("篮球");
42         jcb3 = new JCheckBox("网球");
43         
44         jrb1 = new JRadioButton("男");
45         jrb2 = new JRadioButton("女");
46         //一定要把jrb1，jrb2放入到一个buttongroup
47         ButtonGroup bg = new ButtonGroup();
48         bg.add(jrb1);
49         bg.add(jrb2);
50         
51         //设置布局管理器
52         this.setLayout(new GridLayout(3,1));
53         
54         //添加组件
55         jp1.add(jl1);
56         jp1.add(jcb1);
57         jp1.add(jcb2);
58         jp1.add(jcb3);
59         
60         jp2.add(jl2);
61         jp2.add(jrb1);
62         jp2.add(jrb2);
63         
64         jp3.add(jb1);
65         jp3.add(jb2);
66         
67         this.add(jp1);
68         this.add(jp2);
69         this.add(jp3);
70         
71         this.setSize(300, 150);
72         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
73         this.setVisible(true);
74     }
75 
76 }

 1 /*
 2  * JComboBox/JList/JScrollPane
 3  * */
 4 package demo7;
 5 import java.awt.*;
 6 
 7 import javax.swing.*;
 8 
 9 
10 public class demo10 extends JFrame{
11 
12     /**
13      * @param args
14      */
15     //定义组件
16     JPanel jp1,jp2,jp3;
17     JLabel jl1,jl2;
18     JComboBox jcb1;
19     JList jlist;
20     JScrollPane jsp;
21     public static void main(String[] args) {
22         // TODO Auto-generated method stub
23         demo10 demo = new demo10();
24     }
25     
26     //构造函数
27     public demo10()
28     {
29         jp1 =  new JPanel();
30         jp2 = new JPanel();
31         
32         jl1 = new JLabel("你的籍贯");
33         jl2 = new JLabel("旅游地点");
34         
35         String []jg = {"北京","上海","天津","火星"};
36         jcb1 = new JComboBox(jg);
37         
38         String []dd = {"九寨沟","故宫","长城","天安门"};
39         jlist= new JList(dd);
40         
41         jlist.setVisibleRowCount(2);
42         jsp = new JScrollPane(jlist);
43         //设置你希望显示多少个选项
44         
45         
46         //设置布局
47         this.setLayout(new GridLayout(3,1));
48         
49         //添加组件
50         jp1.add(jl1);
51         jp1.add(jcb1);
52         
53         jp2.add(jl2);
54         jp2.add(jsp);
55         
56         this.add(jp1);
57         this.add(jp2);
58         
59         this.setSize(300, 300);
60         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
61         this.setVisible(true);
62         
63     }
64 
65 }