How many Java Strings Created?

Question

public static void main(String [] args){ 
    String s = \"java\"; //line 1
    s.concat(\" SE 6\"); //line 2
    s.toLowerCase();  //line 3
    System.out.print(s);         


        

Answer 1

3 Java Strings are created.

1. "java"  -> Goes into String constants pool // will be added if no already present
2.  " SE 6" --> Goes into String constants pool?
3. java SE 6 --> Goes on heap (call to concat)// Note : You are not re-assinging the value returned from concat() So s will still be "java"
** toLowerCase() \\ does nothing in your case since "java" is already present. toLowerCase retruns the same "java" object ( as there is no modification required to turn it into lowercase)