System

java.lang.Object
- java.lang.System

All Implemented Interfaces:

Modified
```
public final class System
extends Object
implements Modified
```
Provides access to system-related information and resources including standard input and output. All methods of this class are accessed in a static way and the class itself can not be instantiated.

Field Summary

Fields
Modifier and Type Field Description

static PrintStream err

static InputStream in

static PrintStream out

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`arraycopy(Object src, int srcPos, Object dest, int destPos, int length)`	copies length elements from the array source, beginning with the element at sourcePosition, to the array destination starting at destinationPosition.
`static long`	`currentTimeMillis()`
`static void`	`setErr(PrintStream err)`
`static void`	`setIn(InputStream in)`
`static void`	`setOut(PrintStream out)`

Methods inherited from class java.lang.Object
equals, getClass, hashCode, toString

- Field Detail
  - err
```
public static PrintStream err
```
  - out
```
public static PrintStream out
```
  - in
```
public static InputStream in
```
- Method Detail
  - arraycopy
```
public static void arraycopy(Object src,
                             int srcPos,
                             Object dest,
                             int destPos,
                             int length)
```
    copies length elements from the array source, beginning with the element at sourcePosition, to the array destination starting at destinationPosition. The destination array must already exist when System.arraycopy() is called. The method does not create it. The source and destination arrays must be of the same type
    
    Parameters:
    
    src - Source array.
    
    srcPos - Start element in source array.
    
    dest - Destination array.
    
    destPos - Start element in destination array.
    
    length - Number of elements to be copied.
  - setErr
```
public static void setErr(PrintStream err)
```
  - setIn
```
public static void setIn(InputStream in)
```
  - setOut
```
public static void setOut(PrintStream out)
```
  - currentTimeMillis
```
public static long currentTimeMillis()
```