Any explanation for why not share the same reference at string pool?

Question

https://code.sololearn.com/cwRfX1nUKs8U/?ref=app

Answer 1

The correct "operator" to compare the VALUES of two strings is the equals-method. You're comparing two different objects, which just contain two equal string values. This doesn't make them to the SAME objects.

Answer 2

@sandra I know "equals" and when to use
but I can't understand why c and d do not refer to the same object as I thought that d is at string pool because there is no "new String()" but is that mean c is not allocated at the string pool by concatenation

Answer 3

@Coder that's a good tip 💡
thanks a lot