Doubt in AutoBoxing
Hi,
Can anybody explain why am i getting true in first case and false in second.
publicvoid method(Integer i1, Integer i2){
System.err.println(i1 == i2);
}
delMe.method(100, 100);// true
delMe.method(128, 128);// false
[444 byte] By [
javapro99a] at [2007-11-27 5:46:15]
Integers >= -128 && i <= 127 are being cached so these are pointing to the same object: hence == returns true for these cases.
Compare them like this:public void method(Integer i1, Integer i2){
System.err.println(i1.intValue() == i2.intValue());
}
If the value p being boxed is true, false, a byte, a char in the range \u0000 to \u007f, or an int or short number between -128 and 127, then let r1 and r2 be the results of any two boxing conversions of p. It is always the case that r1 == r2.
YoGeea at 2007-7-12 15:28:49 >
