After a string literal, all the + will be treated as string concatenation operator why? [duplicate]

Answer 1

Because that's how it is implemented, because + is both used for adding numbers, as for String concatenation.

The first time, neither of the parts is a String, but both are numerical values that can be added, so it's used to add the values.

But, as soon as one part of the two is a String, it is used for String concatenation.

Change your code like this:

String s=10+30+" Sachin "+(40+40);