clone问题

[简洁是智慧的灵魂]

我按照java核心编程中的代码输入

	public Employee clone() throws CloneNotSupportedException{
		Employee cloned=(Employee)super.clone();
		cloned.hireday=(Date) hireday.clone();
		return cloned;
	}

为什么会有The return type is incompatible with Object.clone()的错误呢

[applerockhool]

方法写错了吧。返回值是object，而其你要实现Cloneable接口

	@Override
	protected Object clone() throws CloneNotSupportedException {
		// TODO Auto-generated method stub
		return super.clone();
	}

[windforcecn]

public Object clone() throws CloneNotSupportedException{
        Employee cloned=(Employee)super.clone();
        cloned.hireday=(Date) hireday.clone();
        return cloned;
    }

[ruisheng_412]

没有实现Cloneable接口 是有异常的。

[Miracle1216]

该类要实现Cloneable接口

[tfsict2008]

cloneable接口问题，你没有实现这个接口