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）

 package Com.MySwing;
 import java.awt.BorderLayout;
 import java.awt.Dimension;
 import java.awt.EventQueue;
 import java.awt.Toolkit;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import javax.swing.JFrame;
 import javax.swing.JPanel;
 import javax.swing.border.EmptyBorder;

 public class EightSwing extends JFrame {
     private static final long serialVersionUID = 8256394807443698879L;
     private JPanel contentPane;
     public static void main(String[] args) {
         EventQueue.invokeLater(new Runnable() {
             public void run() {
                 try {
                     EightSwing frame = new EightSwing();
                     frame.setVisible(true);
                 } catch (Exception e) {
                     e.printStackTrace();
                 }
             }
         });
     }
     public EightSwing() {
         addWindowListener(new WindowAdapter() {
             @Override
             public void windowOpened(WindowEvent e) {
                 do_this_windowOpened(e);
             }
         });
         setTitle("\u6839\u636E\u684C\u9762\u5927\u5C0F\u8C03\u6574\u7A97\u4F53\u5927\u5C0F");
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         setBounds(100, 100, 450, 300);
         contentPane = new JPanel();
         contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
         contentPane.setLayout(new BorderLayout(0, 0));
         setContentPane(contentPane);
     }
     protected void do_this_windowOpened(WindowEvent e) {
         Toolkit toolkit = getToolkit();// 获得窗体工具包
         Dimension screenSize = toolkit.getScreenSize();// 获取屏幕大小
         int width = (int) (screenSize.width * 0.8);// 计算窗体新宽度
         int height = (int) (screenSize.height * 0.8);// 计算窗体新宽度
         setSize(width, height);// 设置窗体大小
     }
 }