/**
?* @(#)DrawLine.java
?*
?* DrawLine application
?*
?* @author
?* @version 1.00 2007/1/17
?*/
import java.awt.*;
import java.awt.event.*;
public class DrawLine extends Frame
{
?private int begX;
?private int begY;
?private int endX;
?private int endY;
?Image oimg=null;
?Graphics og=null;
?public void paint(Graphics g)
?{
??/*
??Image img=this.getToolkit().getImage("..\\我要學習啦.gif");
??g.drawImage(img,100,100,this);
??if(oimg!=null)
??{
???//g.drawImage(oimg,0,0,this);
??}
??*/
??g.drawImage(oimg,0,0,this);
??
?}
??? public DrawLine()
??? {
??? ?setTitle("DrawLines");
??? ?setSize(400,400);
??? ?setVisible(true);
??? ?Dimension d=this.getSize();
??? ?oimg=this.createImage(d.width,d.height);
??? ?og=oimg.getGraphics();
??? ?addWindowListener(new WindowAdapter()
??? ?{
??? ??public void windowClosing(WindowEvent e)
??? ??{
??? ???e.getWindow().dispose();
??? ??}
??? ?});
??? ?addMouseListener(new MouseAdapter()
??? ?{
??? ??
??? ??public void mousePressed(MouseEvent e)
??? ??{
??? ???begX=e.getX();
??? ???begY=e.getY();
??? ??}
??? ??public void mouseReleased(MouseEvent e)
??? ??{
??? ???endX=e.getX();
??? ???endY=e.getY();
??? ???Graphics g=getGraphics();
??? ???g.setFont(new Font(null,Font.ITALIC|Font.BOLD,30));
??? ???g.setColor(Color.RED);
??? ???g.drawString(begX+","+begY,begX,begY);
??? ???g.drawString(endX+","+endY,endX,endY);
??? ???g.drawLine(begX,begY,endX,endY);
??? ???og.setFont(new Font(null,Font.ITALIC|Font.BOLD,30));
??? ???og.setColor(Color.RED);
??? ???og.drawString(begX+","+begY,begX,begY);
??? ???og.drawString(endX+","+endY,endX,endY);
??? ???og.drawLine(begX,begY,endX,endY);
??? ??
??? ??}
??? ?});
??? }
??? public static void main(String[] args) {
??? ?
??? ?// TODO, add your application code
??? ?System.out.println("Hello World!");
??? ?DrawLine mainFrame=new DrawLine();
??? ?
??? ?
??? }
}