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Core Java - Interview Questions and Answers for 'System class' - 3 question(s) found - Order By Newest

 Q1. Explain System.out.println ?Core Java
Ans. System is a class within java.lang package that contains several useful class fields and methods. It cannot be instantiated and hence can use only statically.even in this case this has been used statically i.e with class name itself and without creating an instance.

out is the static reference of Printstream declared as following in the System Class -

public final static PrintStream out = null;

println is the method of PrintStream class.

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   Like         Discuss         Correct / Improve     System class  Streams  Input Output  println     Asked in 1 Companies      basic        frequent


Related Questions

  What are various types of Class loaders used by JVM ?
  What is a Deadlock ?
  What is the difference between time slicing and preemptive scheduling ?
  Difference between Process and Thread ?
  Which of the following syntax is correct ?import static java.lang.System.*;or static import java.lang.System.*;
 What will happen if we call perform(null) ?

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');
  What are the difference between Threads and Processes ?


 Q2. 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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  Name few IO Stream classes and interfaces ?
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 Explain System.out.println ?
  Tell something about BufferedWriter ? What are flush() and close() used for ?
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  Difference between Scanner and BufferedReader ? Which one is faster and Why ?
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 Q3. Difference between System.out.printf and System.out.println ?Core Java
Ans. println prints an additional end of line whereas printf doesnt.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     System class  Streams  Input Output  println  printf


Related Questions

  What are various types of Class loaders used by JVM ?
  What is a Deadlock ?
  What is the difference between time slicing and preemptive scheduling ?
  Difference between Process and Thread ?
  Which of the following syntax is correct ?import static java.lang.System.*;or static import java.lang.System.*;
 What will happen if we call perform(null) ?

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');
 Explain System.out.println ?
  What are the difference between Threads and Processes ?



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