Swing文本域的编辑

1、.setEditable(false); 设置文本域不可编辑

2、.setHorizontalAlignment(JTextField.CENTER); // 设置文本的水平对齐方式

有效值包括：

JTextField.LEFT 居左

JTextField.CENTER 居中

JTextField.RIGHT 靠右

JTextField.LEADING 靠左上

JTextField.TRAILING 靠右下

3、.setColumns(18); 设置此 TextArea 中的列数为18

4、.setVgap(10); 设置组件之间的垂直距离为10（int型）

5、.setHgap(10); 设置组件之间的水平距离为10（int型）

 1 package Com.MySwing;
 2 import java.awt.BorderLayout;
 3 import java.awt.Dimension;
 4 import java.awt.EventQueue;
 5 import java.awt.Toolkit;
 6 import java.awt.event.WindowAdapter;
 7 import java.awt.event.WindowEvent;
 8 import javax.swing.JFrame;
 9 import javax.swing.JPanel;
10 import javax.swing.border.EmptyBorder;
11 
12 
13 public class EightSwing extends JFrame {
14     private static final long serialVersionUID = 8256394807443698879L;
15     private JPanel contentPane;
16     public static void main(String[] args) {
17         EventQueue.invokeLater(new Runnable() {
18             public void run() {
19                 try {
20                     EightSwing frame = new EightSwing();
21                     frame.setVisible(true);
22                 } catch (Exception e) {
23                     e.printStackTrace();
24                 }
25             }
26         });
27     }
28     public EightSwing() {
29         addWindowListener(new WindowAdapter() {
30             @Override
31             public void windowOpened(WindowEvent e) {
32                 do_this_windowOpened(e);
33             }
34         });
35         setTitle("u6839u636Eu684Cu9762u5927u5C0Fu8C03u6574u7A97u4F53u5927u5C0F");
36         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
37         setBounds(100, 100, 450, 300);
38         contentPane = new JPanel();
39         contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
40         contentPane.setLayout(new BorderLayout(0, 0));
41         setContentPane(contentPane);
42     }
43     protected void do_this_windowOpened(WindowEvent e) {
44         Toolkit toolkit = getToolkit();// 获得窗体工具包
45         Dimension screenSize = toolkit.getScreenSize();// 获取屏幕大小
46         int width = (int) (screenSize.width * 0.8);// 计算窗体新宽度
47         int height = (int) (screenSize.height * 0.8);// 计算窗体新宽度
48         setSize(width, height);// 设置窗体大小
49     }
50 }