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Core Java - Interview Questions and Answers for 'System.out' - 3 question(s) found - Order By Rating

 Q1. What is the difference between System.console.write and System.out.println ?
Ans. System.console() returns null if your application is not run in a terminal (though you can handle this in your application)System.console() provides methods for reading password without echoing charactersSystem.out and System.err use the default platform encoding, while the Console class output methods use the console encoding

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   Like         Discuss         Correct / Improve     java   system class   system.out.println   system.console.write   input output   java6      intermediate        rare


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 Q2. What is the difference between System.out ,System.err and System.in?
Ans. System.out and System.err both represent the monitor by default and hence can be used to send data or results to the monitor. But System.out is used to display normal messages and results whereas System.err is used to display error messages and System.in represents InputStream object, which by default represents standard input device, i.e., keyboard.

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   Like         Discuss         Correct / Improve     java   io   system.out   system.err   system.in   difference between   advanced   basic interview question


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 Q3. What is the difference between out.println(a+b); and out.println (a+" " +b); in Java? with a=2 and b=1Core Java
Ans. First will give the ouput as 3 and the second will give output as 2 1

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   Like         Discuss         Correct / Improve     java   system.out.println   coding


Related Questions

  Will the static block be executed in the following code ? Why ?
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public void perform(Object obj) {
System.out.println("Object");
}

public void perform(Integer int) {
System.out.println("Integer");
}
 What will be the output of following code ?

System.out.println((int)'a');
 What will be the output of

System.out.println((Integer)'a');
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 Q4. What is out in System.out.println ?Core Java
a. out is static inner class
b. out is the reference for static inner class object
c. out is the static reference to OutputStream object
d. out is the static reference to PrintStream object

Ans.d. out is the static reference to PrintStream object


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