japplet1.java

java课程的资料以及实验的代码

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class JApplet1 extends Applet implements ItemListener,ActionListener
{
	Choice choice=new Choice();
	Label label1=new Label("请在文本框输入英文单词和释义，之间用#隔开");
	Label label2=new Label("                         ");
	TextField tf=new TextField(35);
	Button btn=new Button("插入");
	int k=1;
	String eng[]=new String[15];
	String chn[]=new String[15];
	public void init()
	{
		add(label1);
		add(tf);
		add(label2);
		add(btn);
		eng[0]="英文单词";
		choice.add(eng[0]);
		add(choice);
	    btn.addActionListener(this);
		choice.addItemListener(this);
		add(label2);
		}
		public void actionPerformed(ActionEvent e)
		{
			if(e.getSource()==btn)
			{
				int i=0;
				String []str=new String[2];
				StringTokenizer tokenizer=new StringTokenizer(tf.getText(),"#");
				tf.setText("");
				while(tokenizer.hasMoreTokens())
				{
					str[i]=tokenizer.nextToken();
					i++;
				}
				eng[k]=str[0];
				chn[k]=str[1];
				choice.addItem(eng[k]);
				k++;
			}
			repaint();
		}
		public void itemStateChanged(ItemEvent e)
		{
			if(e.getItemSelectable()==choice)
			{
				label2.setText(chn[choice.getSelectedIndex()]);
			}
		}
	}