sameapplettest1.java

Java就业的培训教程书籍

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Enumeration;
/**SameAppletTest1类是Applet子类,并实现了ActionListener接口*/
public class SameAppletTest1 extends Applet implements ActionListener{
	private TextArea taObj;
	private String strObj;
	/**方法init()用于控制界面的外观*/
	public void init(){
		Button butObj = new Button("Click to call getApplets()");
		butObj.addActionListener(this);
		setLayout(new BorderLayout());
		add("South",butObj);
		taObj = new TextArea(5,40);
		taObj.setEditable(false);
		add("Center",taObj);
	}
	/**方法actionPerformed()方法处理当有事件发生时应该调用的方法*/
	public void actionPerformed(ActionEvent event){
		printApplets();
	}
	/**方法printApplets()处理事件发生时,执行操作的具体内容*/
	public void printApplets(){
		Enumeration e = getAppletContext().getApplets();
		taObj.append("**************************\n");
		taObj.append("Results of getApplets():\n");
		while(e.hasMoreElements()){
			Applet appObj = (Applet)e.nextElement();
			String info = ((Applet)appObj).getAppletInfo();
			taObj.append("-"+appObj.getClass().getName()+"\n");
		}
		taObj.append("**************************\n\n");
	}
}