Java用户界面之标签和文本框

 1 package com.swingdemo.demo;
 2 
 3 import java.awt.FlowLayout;
 4 
 5 import javax.swing.JFrame;
 6 import javax.swing.JLabel;
 7 import javax.swing.JTextField;
 8 import javax.swing.UIManager;
 9 
10 public class WebAddress extends JFrame {
11 
12     private static final long serialVersionUID = 1L;
13     
14     public WebAddress() {
15 
16         super("Label and Text boxes");
17         setLookAndFeel();
18         setSize(400, 100);
19         JLabel pageLabel = new JLabel("Web page address: " , JLabel.RIGHT);
20         JTextField pageAddress = new JTextField(20);
21         //设置对象的文本
22         pageAddress.setText("http://java.sun.com");
23         //JTextField pageAddress = new JTextField("http://java.sun.com", 20);//创建对象并赋默认值
24         FlowLayout flo = new FlowLayout();
25         setLayout(flo);
26         add(pageLabel);
27         add(pageAddress);
28         setVisible(true);
29         
30         //获取对象包含的文本
31         String countryChoice = pageAddress.getText();
32         System.out.println(countryChoice);
33         
34     }
35 
36     private void setLookAndFeel() {
37 
38         try {
39             UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
40         } catch (Exception e) {
41             e.printStackTrace();
42         }
43         
44     }
45     
46     public static void main(String[] args) {
47         
48         WebAddress wa = new WebAddress();
49         
50     }
51 
52 }