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programming languages - Java - why no return type based method overloading?

I know this is not possible but can anyone provide a theory as to why Java chose not to support this? I am asking because I just ran into a situation where I think it would be nice to have.

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Because you are not required to capture the return value of a method in Java, in which case the compiler can not decide which overload to use. E.g.

boolean doSomething() { ... }

int doSomething() { ... }

doSomething(); // which one to call???

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