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why is the output strange..

ashu Suri

Joined: Oct 22, 2008
Posts: 18
Run this program and we get extra "Testclass" in the ouput.
Can anybody explain where is it coming from?

public class Test {

public static String text = new String();

public static void main(String args[]){


System.out.println(text.getClass()+ " unknown " + new Test().test());

public String test(){
return "";


salvin francis
Ranch Hand

Joined: Jan 12, 2009
Posts: 928

1. use code tags.

2. This is the output i am getting:

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Rob Spoor

Joined: Oct 27, 2005
Posts: 19848

Order of execution:
- System.out.println(text.getClass()) // prints "class java.lang.String" with an enter
- retrieve text.getClass() // returns a Class object for String
- append that Class object with " unknown "; the Class object is turned into a String using its toString method, and the result is "class java.lang.String unknown "
- call new Test().test()
- inside that method, print out getClass() // prints "class Test" without an enter
- inside that method, return ""
- take the return value and append it to the previous String. It is know "class java.lang.String unknown "
- print out that String // prints "class java.lang.String unknown " with an enter

Since one of the print outs misses an enter (print is called, not println) the "class Test" and "class java.lang.String unknown " are printed directly after each other.

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salvin francis
Ranch Hand

Joined: Jan 12, 2009
Posts: 928

I agree with Rob,

try this version of your program:


Does this answer your query?
I agree. Here's the link:
subject: why is the output strange..