图形界面

Posted 2020-11-20 timhliu

1.实现当点击“+”按钮时，标签给出点击次数。

 1 package 点击;
 2 
 3 import java.awt.*;
 4 import java.awt.event.*;
 5 import javax.swing.*;
 6 
 7 public class TestClickSum extends JFrame implements ActionListener {
 8     private static final long serialVersionUID = 1L;
 9     JLabel j1;
10     JPanel panel;
11     JButton button;
12     int i=0;
13     
14     public TestClickSum(){
15         this.setTitle("点击窗口");
16         this.setSize(500, 500);
17         
18         panel = new JPanel();
19         j1 = new JLabel("点击这里");
20         button = new JButton("+");
21         panel.setBackground(Color.WHITE);
22         //button按钮是一个事件发生者，在这里注册监听器
23         button.addActionListener(this);
24         button.setForeground(Color.GRAY);
25         
26         panel.add(j1);
27         panel.add(button);
28         
29         this.add(panel,BorderLayout.CENTER);
30         this.setResizable(true);//窗口大小是否可变
31         this.setVisible(true);//设置其可见性
32     }
33     
34     public static void main(String[] args) {
35         new TestClickSum();
36     }
37     
38     
39     public void actionPerformed(ActionEvent e) {
40         if(e.getSource()==button) {
41             i++;
42             j1.setText("你已经点击了"+i+"次");
43         }
44     }
45 }

 

 

 

 

2.创建一个会员注册窗体，要求使用上JCheckBox,JRadioButton,JTextFiled,JTextArea等组件，并将用户的注册信息显示到文本区中

  1 package 会员注册;
  2 
  3 import java.awt.Color;
  4 import java.awt.event.ActionEvent;
  5 import java.awt.event.ActionListener;
  6 
  7 import javax.swing.ButtonGroup;
  8 import javax.swing.JButton;
  9 import javax.swing.JCheckBox;
 10 import javax.swing.JFrame;
 11 import javax.swing.JLabel;
 12 import javax.swing.JPanel;
 13 import javax.swing.JRadioButton;
 14 import javax.swing.JTextField;
 15 import javax.swing.JTextArea;
 16 
 17 public class TestJLableAndJTextField extends JFrame implements ActionListener {
 18     private static final long serialVersionUID = 1L;
 19     //创建JPanel对象  
 20     private JPanel jp;
 21     //建立所有标签
 22     private JLabel jlabel1=new JLabel("注册账号：");
 23     private JLabel jlabel2=new JLabel("输入密码：");
 24     private JLabel jlabel3=new JLabel("确认密码：");
 25     private JLabel jlabel4;
 26     private JLabel jlabel5;
 27     private JLabel jlabel6;
 28     //建立所有文本框
 29     private JTextField jtf1;
 30     private JTextField jtf2;
 31     private JTextField jtf3;
 32     //建立做最终文本区域框
 33     private JTextArea jtr;
 34     //建立复选框
 35     private JCheckBox jcb1;
 36     private JCheckBox jcb2;
 37     private JCheckBox jcb3;
 38     //建立单选框并将两个按钮放置于一个按钮group中
 39     private ButtonGroup group;
 40     private JRadioButton jrb1;
 41     private JRadioButton jrb2;
 42     //建立 确认 和 取消按钮
 43     private JButton button1;
 44     private JButton button2;
 45     
 46     
 47     public TestJLableAndJTextField(){
 48         this.setTitle("注册页面");  
 49         this.setBounds(100, 100, 700, 300);
 50         //单击窗口的关闭按钮时程序执行的操作
 51         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 52         
 53         jp = new JPanel();
 54         jtf1 = new JTextField(50);
 55         jtf2 = new JTextField(50);
 56         jtf3 = new JTextField(50);
 57         //添加三行标签注册账号，输入密码，确认密码
 58         jp.setBackground(Color.GRAY);
 59         jp.add(jlabel1);
 60         jp.add(jtf1);
 61         jp.add(jlabel2);
 62         jp.add(jtf2);
 63         jp.add(jlabel3);
 64         jp.add(jtf3);
 65         //设置复选框     
 66         jlabel4 = new JLabel("爱好选择");
 67         jp.add(jlabel4);
 68         jcb1 = new JCheckBox("音乐");
 69         jcb2 = new JCheckBox("旅游");
 70         jcb3 = new JCheckBox("读书");
 71         jp.add(jcb1);
 72         jcb1.addActionListener(this);
 73         jp.add(jcb2);
 74         jcb2.addActionListener(this);
 75         jp.add(jcb3);
 76         jcb3.addActionListener(this);
 77         //设置单选框
 78         jlabel5 = new JLabel("性别");
 79         jp.add(jlabel5);
 80         group = new ButtonGroup();
 81         jrb1 = new JRadioButton("男");
 82         jrb2 = new JRadioButton("女");
 83         group.add(jrb1);
 84         group.add(jrb2);
 85         jrb1.addActionListener(this); 
 86         jrb2.addActionListener(this); 
 87         jp.add(jrb1);
 88         jp.add(jrb2);
 89         //设置显示文本框
 90         jlabel6 = new JLabel("显示信息");
 91         jp.add(jlabel6);
 92         jtr = new JTextArea(5,10);
 93         jp.add(jtr);
 94         //设置按钮，确定和取消
 95         button1 = new JButton("确认");
 96         button2 = new JButton("取消");
 97         jp.add(button1);
 98         button1.addActionListener(this); 
 99         jp.add(button2);
100         button2.addActionListener(this);  
101         
102         this.add(jp); 
103         this.setVisible(true);  
104     }
105     
106     
107     
108     
109     
110     public static void main(String[] args) {
111         new TestJLableAndJTextField();
112     }
113     
114     
115     
116     
117     
118     public void actionPerformed(ActionEvent e) {
119         if(e.getSource()==button2) {
120             //若点击了 取消 按钮时，清空所有选项
121             group.clearSelection();   
122             jcb1.setSelected(false); 
123             jcb2.setSelected(false); 
124             jcb3.setSelected(false); 
125             jtf1.setText(" "); 
126             jtf2.setText(" "); 
127             jtf3.setText(" "); 
128             jtr.setText(" ");
129         }else {
130             StringBuffer temp = new StringBuffer("您的账号是：");
131             temp.append(jtf1.getText());
132             //temp.append(jtf2.getText());
133             //temp.append(jtf3.getText());
134             String text2=jtf2.getText();
135             String text3=jtf3.getText();
136             if(text2.equals(text3)/*jtf2.getText()==jtf3.getText()*/) {
137                 temp.append("
"+"您的密码是："+jtf2.getText());
138             }else{
139                 temp.append("
"+"两次输入密码不一致");
140                 jtr.setText(temp.append("。").toString());
141                 return;
142             }
143             if(jcb1.isSelected()){  
144                 temp.append("
"+"您的爱好有："+jcb1.getText());  
145             }  
146             if(jcb2.isSelected()){ 
147                 temp.append("
"+"您的爱好有："+jcb2.getText()); 
148             } 
149             if(jcb3.isSelected()){  
150                 temp.append("
"+"您的爱好有："+jcb3.getText());  
151             } 
152             if(jrb1.isSelected()){  
153                 temp.append("
"+"您的性别是："+jrb1.getText());  
154             } 
155             if(jrb2.isSelected()){  
156                 temp.append("
"+"您的性别是："+jrb2.getText());  
157             } 
158             jtr.setText(temp.append("。").toString());
159         }
160     }
161 }