java.lang
Class System

java.lang.Object
  java.lang.System

public class System
extends Object

Library of system level methods.

Field Summary

static PrintStream	err Current error output stream.
static PrintStream	out Current output stream.

Method Summary

static long	currentTimeMillis() Returns the system's millisecond counter.
static void	exit(int exitCode) Exit the application.
static int	identityHashCode(Object o) Gets the default (identity) hash code for the specified object.
static void	setErr(PrintStream newErr) Sets the error output stream.
static void	setOut(PrintStream newOut) Sets the output stream.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait

Field Detail

err

public static PrintStream err

Current error output stream.

out

public static PrintStream out

Current output stream.

Method Detail

currentTimeMillis

public static long currentTimeMillis()

Returns the system's millisecond counter.

Returns:

milliseconds since the system started

exit

public static void exit(int exitCode)

Exit the application.

Parameters:

exitCode - code indicating why the application exited

identityHashCode

public static int identityHashCode(Object o)

Gets the default (identity) hash code for the specified object.

This hash code is guarenteed to be unique for each object. Two objects return the same identity hash code, they are the same object instance.

Parameters:

o - object

Returns:

identity hash code

setErr

public static void setErr(PrintStream newErr)

Sets the error output stream.

Parameters:

newErr - new error output stream

setOut

public static void setOut(PrintStream newOut)

Sets the output stream.

Parameters:

newOut - new output stream