String s = new String(“xyz”). How many objects has been made after this line of code execute?

Question

The commonly agreed answer to this interview question is that two objects are created by the code. But I don\'t think so; I wrote some code to confirm.

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Answer 1

Two objects will be created for this:

String s = new String("abc");

One in the heap and the other in the "string constant pool" (SCP). The reference s will pointing to s always, and GC is not allowed in the SCP area, so all objects on SCP will be destroyed automatically at the time of JVM shutdown.

For example:

Here by using a heap object reference we are getting the corresponding SCP object reference by call of intern()

String s1 = new String("abc");
String s2 = s1.intern(); // SCP object reference
System.out.println(s1==s2); // false
String s3 = "abc";
System.out.println(s2==s3); //True s3 reference to SCP object here