doubt about equals vs ==

[NarendraMohan Prasad]

I've written the following code for the test
I want reason for the difference between ==
and .equals.
a
why == is giving true for the "Test1"

public class StringObjTest {
public static void main(String[] args) {
String str1 = "Test1";
String str2 = "Test1";
String str3 = new String("Test1");
String str4 = new String("Test1");
System.out.println("This is Test");
System.out.println(" str1 == str2 :: "+(str1==str2));
System.out.println(" str1.equals(str2) :: "+str1.equals(str2));
System.out.println(" str1 == str3 :: "+(str1==str3));
System.out.println(" str1.equals(str3) :: "+(str1==str3));
System.out.println(" str3 == str4 :: "+(str3==str4));
System.out.println(" str3.equals(str4) :: "+str3.equals(str4));
}
 
}

(Changed title to be meaningful)
[ June 06, 2007: Message edited by: Barry Gaunt ]

[Chandra Bhatt]

Hi Narendra,

This sort of question has been discussed hundreds of times. If you use
the search facility of JavaRanch, you will find so many interesting discussion
on this.

Hint: When you use new operator to create String object, object is created
at run time. Without using "new" you call compile time created String object.
Objects created with "new", gives false result when you use == to compare
them even if the content is same. Because == compares references of the
objects.


Thanks,

[ram shah]

http://www.javaranch.com/journal/200409/Journal200409.jsp#a1

pls go through the link mentioned above......your doubt would be clear.