What is the purpose of System class in Java?

Java 8Object Oriented ProgrammingProgramming

System class belongs to the package java.lang. It cannot be instantiated.

A System class provides −

  • standard output.
  • error output streams.
  • standard input and access to externally defined properties and environment variables.
  • A utility method for quickly copying a portion of an array.
  • a means of loading files and libraries.

Following are the fields for java.lang.System class −

  • static PrintStream err − This is the "standard" error output stream.
  • static InputStream in − This is the "standard" input stream.
  • static PrintStream out − This is the "standard" output stream.
Updated on 30-Jul-2019 22:30:20