String count in the pool with println

Question

I am preparing for the OCA SE 7 exam, and some of these questions are really (!) tricky.

In one of the books Im using I found an error I think, so I would like to co

Answer 1

It should be 2 strings: "autumn" and "false". The first is created by the first line. The second is created by the second line because the compiler would optimize it to just:

System.out.println(false);

which ends up calling PrintStream#print(boolean):

public void print(boolean b) {
    write(b ? "true" : "false");
}

This is what happens at runtime, i.e. after the code is executed. However, at the level of the constant pool stored in the bytecode, only 1 string constant is created which is "autumn" in the classfile of the class which contains your main method. You can verify this by running:

javap -c -verbose ClassName