assignment operator : doubt.......

[Parameswaran Thangavel]

char c = 65;
double d = 10;
if(c==d)


i doubt how two different type are compared. Though it is a basic doubt i want some one to explain me about this....

[Sakthi Kani]

Hi

U can compare the two different type.
If both r compatible it returns true.

 eg:
 
int i=10;
short s=10;
if(s==i)
System.out.println("true");
 
 

So, in your code char and double r incompatible.

hope u got it.

[Parameswaran Thangavel]

hi
thank u for ur reply

is the following code legal???

Object a = "hello";
String b = "hello";
if(a == b)
System.out.println("equal");
else
System.out.println("not equal");

[Sakthi Kani]

hi paramesh

  Object a = "hello";
String b = "hello";
if(a == b)
System.out.println("equal");
else
System.out.println("not equal"); 

This is legal it gives the result as equal.Both object reference has the same hashcode, because both value r same.

Check the following code to understand

 {
Object a = "hello";
String b = "hellofriend";
if(a.hashCode()==b.hashCode())
System.out.println("Same hash code");
else
System.out.println("different hash code");
 

Now in this case, it has differnet hashcode.

[Parameswaran Thangavel]

can i say on using == the both operands should belong to the same hierarchy..

[Sakthi Kani]

Yes.

whenever u get doubt, first u try it out with small sample program.
Even then, u can't understand then post it. Because trying yourself will help u more than others explanation.