package?com.imooc;

public?abstract?class?Telphone?{
	public?abstract?void?call();
	public?abstract?void?message();
}


package?com.imooc;

public?class?CellPhone?extends?Telphone?{

	@Override
	public?void?call()?{
		System.out.println();
		//?TODO?Auto-generated?method?stub

	}

	@Override
	public?void?message()?{
		//?TODO?Auto-generated?method?stub

	}

}

錯誤顯示為：

Multiple markers at this line

- The method call() of type CellPhone must?

override or implement a supertype method

- implements com.imooc.Telphone.call