comboboxdemo.java

来自「java课件 java课件 java课件 java课件」· Java 代码 · 共 41 行

//<applet code="ComboBoxDemo.class" height="150" width="300">
//</applet>
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class ComboBoxDemo extends JApplet
       implements ItemListener{
   Container cp;
   JComboBox  os = new JComboBox(),
              browser = new JComboBox();
   JTextArea ta=new JTextArea(4,20);
   
   public void init(){
   	 os.addItem("Windows");
   	 os.addItem("Linux");
   	 os.addItem("Solaries");
   	 os.addItem("MacOS");
   	 browser.addItem("Internet Explore");
   	 browser.addItem("Netscape Navigator");
   	 browser.addItem("Mosaic");
   	    	 
   	 cp=getContentPane();
   	 cp.setLayout(new FlowLayout());
   	 cp.add(os);
   	 cp.add(browser);
   	 cp.add(ta);
   	 
   	 os.addItemListener(this);
   	 browser.addItemListener(this);
   	 
   }
   public void itemStateChanged(ItemEvent e){
     String s1 = "OS you selected:",
            s2 = "Browser you selected:";
     s1 = s1+os.getSelectedItem()+"\n";
     s2 = s2+browser.getSelectedItem();
     ta.setText(s1+s2);        	  
   }
}