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Which of the following lines will print false?

Submitted by Megha on Fri, 09/03/2010 - 23:18

SCJP
SCJP

public class StringDemo
{
   static String str1 = "Hello world";
   public static void main(String args[])
   {
       String str2 = "Hello world";
       String str3 = new String(str1);
       System.out.println(str1 == str2);
       System.out.println(str1.equals(str2));
       System.out.println(str3 == str1);
       System.out.println(str3.equals(str1));
 
   }
}