Underlying mechanism of String pooling in Java?

Question

I was curious as to why Strings can be created without a call to new String(), as the API mentions it is an Object of class java

Answer 1

1. A kind of, but not exactly.
   String constants are created and interned during constant pool resolution. This happens upon the first execution of LDC bytecode that loads a string literal. After the first execution the JVM replaces JVM_CONSTANT_UnresolvedString constant pool tag with JVM_CONSTANT_String tag so that the next time LDC will take an existing string instead of creating a new one.

2. No. The first use of "Test" will create a new string object. Then new String("Test") will create the second object.

3. Yes, using HotSpot Serviceability Agent. Here is an example.