Output of String interning puzzles.

Scenario:

String s1 = "Java";
String s2 = "Java";
String s3 = new String("Java");
String s4 = s3.intern();

System.out.println(s1 == s2); // true (Both refer to Pool)
System.out.println(s1 == s3); // false (s3 is in Heap, s1 is in Pool)
System.out.println(s1 == s4); // true (s4 is the interned reference from Pool)

Explanation:

• == checks for reference equality.
• s1 and s2 are literals, so they share the same memory location in the String Pool.
• s3 is created in the Heap using new, so it has a different memory address.
• s3.intern() returns the reference of "Java" from the pool, which is the same address as s1.