第１４回独習Ｊａｖａゼミ直江担当演習問題
解答例
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問１

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

/*
 <applet code="test1" width="200" height="200">
 </applet>
 */


public class test1 extends Applet implements KeyListener{
	String temp ;
	public void init(){
		addKeyListener(this) ;
		this.temp=new String() ;
	}
	public void keyTyped(KeyEvent ke){
	}
	public void keyPressed(KeyEvent ke){
		StringTokenizer st=new StringTokenizer(ke.toString(),",") ;
		while(st.hasMoreTokens()){
			String s=st.nextToken() ;
			if(s.indexOf("keyText")!=-1){
				this.temp=s ;
			}
		}
		repaint() ;
	}
	public void keyReleased(KeyEvent ke){
	}
	public void paint(Graphics g){
		g.drawString(this.temp,20,50) ;
	}
}

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問２

import java.applet.*;
import java.awt.*;
import java.awt.event.*;

/*
 <applet code="test1" width="200" height="200">
 </applet>
 */


public class test1 extends Applet implements MouseListener{
	Point p[] ;
	public void init(){
		this.p=new Point[2] ;
		this.p[0]=new Point() ; this.p[1]=new Point() ;
		addMouseListener(this) ;
	}
	public void mouseClicked(MouseEvent me){
	}
	public void mouseEntered(MouseEvent me){
	}
	public void mouseExited(MouseEvent me){
	}
	public void mousePressed(MouseEvent me){
		this.p[0]=me.getPoint() ;
	}
	public void mouseReleased(MouseEvent me){
		this.p[1]=me.getPoint() ;
		repaint() ;
	}
	public void update(Graphics g){
		paint(g) ;
	}
	public void paint(Graphics g){
		g.drawLine(this.p[0].x,this.p[0].y,this.p[1].x,this.p[1].y) ;
	}
}
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