如何在Java中停止执行被调用方法并继续执行调用方法

Question

Consider the following code snipett:

public String testMethod1(int i, int j)
{
//do something
testmethod2(i,j);
return "some string";
}

public String testMethod2(int i, int j)
{
//do something
if(some condition)
{
//Stop execution of this method
//continue execution of previous method as if this method was never called
}
return "some string";
}

Is there a way that we can achieve something like above in java. I want the second method to stop its execution and the first method should continue as if the second method was never called

Answer 1

In your testMethod2 , you should return to stop its execution. However, just a plain return is not enough as your method returns a String . You must return a String or null.

My suggestion is to return an empty string ( "" ). Why not return null? Because the calling method may want to do something with the string returned. If it is null, a NullPointerException will be thrown, which is not good!

So you should do this:

if (some condition) {
    return "";
}