path.java

用java写的简单的画图程序

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package pen;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.io.Serializable;
import java.util.ArrayList;

/**
 *
 * @author Administrator
 */
public class Path implements Serializable {
    private ArrayList<Point> ps;
    private Color c;
    private int t;

    public Path(ArrayList<Point> ps, Color c, int t) {
        this.ps = ps;
        this.c = c;
        this.t = t;
    }

    public void addPoint(Point p) {
        this.ps.add(p);
    }

    public void draw(Graphics g) {
        Graphics2D g2d = (Graphics2D)g;
        Point p1 = this.ps.get(0);
        for (int i = 1; i < this.ps.size(); i++) {
            Point p2 = this.ps.get(i);
            g.setColor(c);
            g2d.setStroke(new BasicStroke(t));
            g.drawLine(p1.x, p1.y, p2.x, p2.y);
            p1 = p2;
        }
    }
}