Java System Class

The System class of java contains several useful class fields and methods. It also provides facilities like standard input, standard output, and error output Streams. It can't be instantiated.

The Java System class comes in the module of "java.base" & in the package of "java.lang".

In Java System Class, we have 3 different types of field and 28 different types of method.

Java System Class consists of following fields:-

Java System class Methods:

Java System Class consists of following methods:-

Example 1

Output:

Source array:ABBHAM Destination array:SHUNUL Source Position:2 Destination Position:3 Length:4 Destination array after use of arraycopy() SHUBHAMJADON 

Example 2

Output:

Current time in millisecond 1532262046724 

Example 3

Output:

Shubham Jadon 

Example 4

Output:

Current time in nanoseconds = 1316893720017448 

Example 5

Output:

identity hash code of object a = 843730481 identity hash code of object b = 743673026 

Example 6

Output:

Your System property for user shubham C:\Users\Shubham Jadon C:\Users\Shubham Jadon\eclipse-workspace\tpoint 

Example 7

Output:

my name : Shubham Jadon 

Example 8

Output:

map library for OS's name = os.name.dll map library for OS's architecture = os.arch.dll map library for OS's version = os.version.dll