== , equals() method problem

[Kota li]

public class Vars {
public static void main(String args[]) {
Integer i1 = 123;
Integer i2 = 123;
Integer i3 = 12345;
Integer i4 = 12345;
int i5 = 123;
System.out.println(i1==i2);
System.out.println(i3==i4);
System.out.println(i3<=i4);
System.out.println(i3.equals(i4));
System.out.println(i1==i5);
System.out.println(i1>i4);
}
}

output is:
true
false
true
true
true
false
Why second one is false bott references are identical though false I unable to getting this question given JavaBeat beta question anybody expedite.

[srinivas.b]

Hi

The Integer,Short and Long shows true upto 127 (Maximum value of byte)
Once it exceed it shows false.

[Teo Framoe]

Hi,
Check marc weber clearing this up in
Boxing == Long

                        
public class Vars { 
  public static void main(String args[]) { 
    Integer i1 = 123; 
    Integer i2 = 123; 
    Integer i3 = 12345; 
    Integer i4 = 12345; 
    int i5 = 123; 
    System.out.println(i1==i2); // Same wrapper instance. -128 < value < 127
    System.out.println(i3==i4); // Different wrapper instanse. Value > 127.
    System.out.println(i3<=i4); // accidental i3 address < i4 address
    System.out.println(i3.equals(i4)); // Check on value
    System.out.println(i1==i5); // Unwrapping i1 before comparison 
    System.out.println(i1>i4); // Different wrapper instanse. Accidental i1 not > i4
  } 
} 

Regards,
Teo
[ October 17, 2007: Message edited by: Teo Framoe ]

[Mayur Ramgir]

To save memory, java doesn�t create new object for any of the following values; it does mean that the values within this rages are referred to by same object. It is very similar to String object where two similar string objects is referred by only one object in the String pool.

Value ranges are as follows;
int, short -128 to 127
boolean true or false
char \u0000 to \u007f

[camilo lopes]

Good as I explained with the greatest wrapper to receive is true with 127 above that will always be false. Unless you use the method equals (). Now I do not understand why the line below is true? This result is a rule or was a coincidence?

   System.out.println(i3<=i4);  

thanks.

[Yogesh Baraskar]

This is just a coincidence.
i3 an i4 both exceeded 127 so objects reference will be used
to compare instead of the value.

Sometimes it may return false also. Try creating object i4 before i3 and then compare.