Original string is not modified after calling toUpperCase() : String class « Utility Classes « SCJP

1. SCJP
2. Utility Classes
3. String class

public class MainClass {
  public static void main(String[] argv) {
    String s = "test";
    String t = s.toUpperCase();

    System.out.println(s);
    System.out.println(t);
  }
}

test
TEST