Please explain the answers...

[ankur tyagi]

class test {
public static void main(String[] args) {
test inst_test = new test();
int i1 = 2000;
int i2 = 2000;
int i3 = 2;
int i4 = 2;
Integer Ithree = new Integer(2); // 1
Integer Ifour = new Integer(2); // 2
System.out.println( Ithree == Ifour );
inst_test.method( i3 , i4 );
inst_test.method( i1 , i2 );
}
public void method( Integer i , Integer eye ) {
System.out.println(i == eye );
}
}


ans: false true false...
y its for i3 & i4 but false for i1 & i2

[sudipto shekhar]

This might help....

[Jesper de Jong]

Ankur, welcome to JavaRanch.

When you copy a question from a book, mock exam or other source, we require that you quote your sources. So, please tell us where you copied this question from.

[Krishna Srinivasan]

Normally, when the primitive types are boxed into the wrapper types, the JVM allocates memory and creates a new object. But for some special cases, the JVM reuses the same object.

The following is the list of primitives stored as immutable objects:

* boolean values true and false
* All byte values
* short values between -128 and 127
* int values between -128 and 127
* char in the range \u0000 to \u007F
http://today.java.net/pub/a/today/2005/03/24/autoboxing.html