core java: can we compare two stringbuffer objects with equals() method

[srinivas Doni]

Hi to all,

Can we compare two string buffer objects with equals() method ?

[Ryan Beckett]

StringBuffer sb = new StringBuffer("one");
StringBuffer sb2 = new StringBuffer("one");
System.out.println(sb.equals(sb2)); //prints "false"

I've read that StringBuffer.equals compares the objects' references, not the content of their strings. The correct way is as follows.

System.out.println(sb.toString().equals(sb2.toString())); 

[srinivas Doni]

Hi ryan,

Thank you very much

[fred rosenberger]

If you check the API, you would see that StringBuffer inherits its equals() method directly from the Object class, so yes, it would compare reference equality.

Note: There is no such thing as stringbuffer (as you list in your titile) or a "string buffer object". I am ASSUMING you mean 'StringBuffer'. Remember, Java is case sensitive. If you don't name things correctly, the compiler and JVM will have NO IDEA what you are talking about, and we (other people) can only guess.