ranlineobj.java

一个基于swing的网络白板

package mywb;

import java.awt.*;
import java.io.*;
import java.util.*;

public class RanLineObj implements Serializable {
  Vector points = new Vector();
  Color color = null;
  int x0 , y0 , x1 , y1;
  public static int type = 8 ;

  public RanLineObj(Color c){
    color = c;
  }

  public void setPoints(int x, int y){
    Point point = new Point(x,y);
    points.add(point);
  }

  public void paint(Graphics g){
     g.setColor (color);
     Enumeration allpoints = points.elements();
     Point start = (Point)allpoints.nextElement();
     x0 = (int)start.getX();
     y0 = (int)start.getY();
     while(allpoints.hasMoreElements()){
          Point end = (Point)allpoints.nextElement();
          x1 = (int)end.getX();
          y1 = (int)end.getY();
          g.drawLine(x0,y0,x1,y1);
          x0 = x1;
          y0 = y1;
     }
  }
}