What is System out and println

What is System out and println In System.out.println() ?

Answer :

  • System is a final class which is bundled in java.lang package
  • out is the reference of PrintStream class and It’s static member of System class
public final static PrintStream out = null;


  • println is a method of PrintStream class which bundled in java.io package which prints output
     * Terminates the current line by writing	
     * the line separator string.  The line separator
     * string is defined by the system property
     * <code>line.separator</code>, and is not 
     * necessarily a single newline
     * character (<code>'\n'</code>).
    public void println() {


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