外部方法如何知道内部方法中发生异常

I have 5 methods e.g. 1, 2, 3, 4, 5. I am calling method2 from method1, method 3 from method2 and so on. Suppose an exception happens in Method5 and I am handling it in the try-catch block, how will I know this in Method1?I have 5 methods e.g. 1, 2, 3, 4, 5. I am calli