java的clone对象

怎么实现对ShapeManager的深复制哈。。
Java code:
public class ShapeManager implements Cloneable{
private ArrayList<Shape> shapes = new ArrayList<Shape>();

public ArrayList<Shape> getShapes() {
return shapes;
}

public void setShapes(ArrayList<Shape> shapes) {
this.shapes = shapes;
}

public void setShape(Shape shape){
shapes.add(shape);
}

@Override
protected ShapeManager clone() throws CloneNotSupportedException {
ShapeManager copy = (ShapeManager)super.clone();
return copy;
}
}

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thinking in java 中查一下也就知道了哈，不是太常用。

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谢谢楼上··脑子一下子短路了。。