point.java

< Java多线程设计模式>> 一书

public final class Point {
    private int x;
    private int y;
    public Point(int x, int y) {
        this.x = x;
        this.y = y;
    }
    public synchronized void move(int dx, int dy) {
        x += dx;
        y += dy;
    }
讲到这里为止