Counting String objects created by Java code

Question

How many String objects are created by the following code?

String x = new String(\"xyz\");
String y = \"abc\";
x = x + y;

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Answer 1

Line 1:String x = new String("xyz");
Line 2:String y = "abc";
Line 3:x = x + y;

Strings are Immutable so if any existing string variable need to be changed then new object will be created for assignment. Line 1,Line 2 are string objects where as Line 3 is modification of the existing string variable so new allocation need to be done to add x+y. So it should create creates 3 Objects.