Difference between Initializing string with new and “ ”

Question

Which one is correct and why:

String dynamic = new String();
dynamic = \" where id=\'\" + unitId + \"\'\";

Or

String dynamic = \" where id=\'\" + unitId + \"         


        

Answer 1

Short answer:

String str = new String();

creates a new String object on the heap. When you do afterwards:

str = "Hello, String Pool";

You simply overwrite the reference to the first object with another reference. Thus, the first object is lost. Keep this in mind: Strings are immutable.