question about wrapper objest

[zhu weitao]

    
public class Test{

public static void main(String [] args){

Integer a = 1;
Integer b = 1;

Integer c = new Integer(1);
Integer d = new Integer(1);

System.out.println(a==b);
System.out.println(c==d);
}
}

What't the differences between "Integer a = 1;" and "Integer c = new Integer(1);"?

And,why the result of "System.out.println(c==d);" is "false"

[Sagar Rohankar]

Discussed many times , search this forum or Java Beginner section , and this recent thread discussed your doubt !

[Seetharaman Venkatasamy]

Hi,

"==" tells whether references are refer to the same object or not.

Integer i=new Integer(1);
Integer j=new Integer(1);

the Bold case are different object right?

when you put something like this

Integer a=1,b=1; //the both references pointing 1 so true

    
 
Integer i=128;
Integer j=128;
System.out.println(i==j);
 
What  you think  about  This   :wink: