How many Java string objects created in the code String s="abc"+"xyz";?

Question

How many Java string objects will be created in the following statement?

String s = "abc" + "xyz"; 

I guess three?

Answer 1

The compiler creates 1 String per JVM start, because the compiler can determine the resulting String at compile time, it is interned and statically stored in the JVM's String Table.

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FYI, if the statement were concatenating variables (not determinable at runtime), 1 String would be created, but it would create a StringBuilder too. The code would compile to:

new StringBuilder().append(abcVar).append(xyzVar).toString()