Question

在java的applet界面中用鼠标点击拖动画出矩形的代码是怎么编译？

或在applet中画斜线的代码也行！谢谢各位在虾！

Answer 1

import java.applet.Applet;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
public class Sort extends Applet{
public void init(){
addMouseListener(new MouseAdapter1());
}
public void paint(Graphics g){
Font f= new Font("宋体",Font.PLAIN,20);
g.setFont(f);
g.setColor(Color.BLUE);
g.drawString("画矩形",100,100);
}

public class MouseAdapter1 extends MouseAdapter {
int x,y;
public void mousePressed (MouseEvent e)
{
x = e.getX();
y = e.getY();
}
public void mouseReleased (MouseEvent e)
{

Graphics g;
g=getGraphics();
g.drawRect(x,y,(e.getX()-x),(e.getY()-y));
}
}
}

Answer 2

point firstPoint;
point secondPoint;
onpress(){save the first point}
onrelease(){
if(secondPoint not equals firstPoint){
drawShape(firstPoint, secondPoint);
}
}