ch9_21.java

60多个javaSwing范例

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class ch9_21 extends JFrame
{
    public ch9_21()
    {
        super("测试下拉列表框");
        setBounds(20,20,600,400);
        getContentPane().setLayout(null);        
    }
    public static void main(String [] args)
    {
        ch9_21 f=new ch9_21();
        
        String [] fontsize={"12","14","16","18","20","22","24","26","28"};
        String defaultMessage="请选择或直接输入文字大小";
       
        JComboBox jcb=new JComboBox(fontsize);
        jcb.setBorder(BorderFactory.createTitledBorder("列表"));
        jcb.setBounds(20,20,180,50);
        jcb.setEditable(true);
        ComboBoxEditor editor=jcb.getEditor();
        jcb.configureEditor(editor,defaultMessage);
        
        
        f.getContentPane().add(jcb);
        
        f.show();
    }
}