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±ÈÈçÒ»¸öJButton¿Ø¼þ£¬ÈçºÎ°ÑËüµÄÖµ£¨¼ÙÉèΪ1£©´«µ½JTextFieldÉϲ¢ÏÔʾ³öÀ´£¬²¢ÇÒ°ÑJButtonµÄÖµË͸øÒ»¸ö±äÁ¿
£¨ÎÒÖªµÀÒªÓüàÌýÆ÷£¬µ«ÊÇʼþ·¢Éúºó´¦ÀíµÄ·½·¨Ôõôд²»ÖªµÀ£©
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±ÈÈçÒªÐ޸ĵÄJTextFieldÉùÃ÷ʱÊÇÕâÑùÉùÃ÷µÄ
JTextField tx = new JTextField();
JButton¿Ø¼þ¼ÓÒ»¸ö¼àÌýÆ÷
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tx.setText(""+1);

Java code:
package com.javamvp.swingdemo;
import java.awt.Container;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class CreatJF09 extends JFrame implements ItemListener{
JComboBox jcb;
CreatJF09()
{
setSize(400,400);
setLocation(400, 300);
String items[] = { "ÇëÑ¡ÔñÑÕÉ«", "ºì", "³È", "»Æ" };
jcb = new JComboBox(items); // н¨³õʼÓÐÈý¸öÑ¡ÏîµÄ×éºÏ¿ò
jcb.addItem("ÂÌ"); // Ïò×éºÏ¿òÌí¼ÓÐÂÑ¡Ïî
jcb.addItem("˦");
Container con=getContentPane();
con.add(jcb,BorderLayout.NORTH);
// add(jcb, BorderLayout.NORTH); jdk1.6ĬÈÏÊ®container£¬²»Óô´½¨×Ô¶¯Ìí¼Ó
jcb.addItemListener(this);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void itemStateChanged(ItemEvent e)
{ int index = jcb.getSelectedIndex();//·µ»ØÑ¡ÖеÄÏîÄ¿ÐòºÅ


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