StringBuffer equals() query

[Anup Jadhav]

Hi guys,

public class TestClass
{
public static void main(String Args[])
{
StringBuffer sb1 = new StringBuffer("String");
StringBuffer sb2 = new StringBuffer("String");
if(sb1.equals(sb2))
{
//lots of code
}
}
}

The question is : will the code reach //lots of code ?
Suprisingly the correct answer is : No.

Can anybody please explain ?

[Vinayagar Karpagam]

It is "No" because equals() method is not overridden by StringBuffer.
So, the equals() of class Object is invoked which checks for the objects' references equality. Since "new" is used, the references will be different.

[Gitesh Ramchandani]

I would just like to add 1 line to what Vinayagar said,

StringBuffer equals() uses == for comparison. Here sb1 and sb2 refer to 2 different objects, so you get a false.

Gitesh