java线程小题引发的思考

是否是线程安全的??
public class Point{ public int x,y; public Point(int x, int y){  
x=0;  
y=0;  
} public Point(Point p){ this.x=p.x; this.y=p.y;  
}  
}
来自: http://www.jdon.com/44632

扩展blog:http://www.ibm.com/developerworks/java/library/j-jtp0618/index.html

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