The java.lang.System.exit() method exits current program by terminating running Java virtual machine. This method takes a status code. A non-zero value of status code is generally used to indicate abnormal termination. This is similar exit in C/C++.
Following is the declaration for java.lang.System.exit() method:
public static void exit(int status)
exit(0) : Generally used to indicate successful termination.
exit(1) or exit(-1) or any other non-zero value – Generally indicates unsuccessful termination.
Note : This method does not return any value.
The following example shows the usage of java.lang.System.exit() method.
// A Java program to demonstrate working of exit()import java.util.*;import java.lang.*;  class GfG{    public static void main(String[] args)    {        int arr[] = {1, 2, 3, 4, 5, 6, 7, 8};          for (int i = 0; i < arr.length; i++)        {            if (arr[i] >= 5)            {                System.out.println("exit...");                  // Terminate JVM                System.exit(0);            }            else                System.out.println("arr["+i+"] = " +                                  arr[i]);        }        System.out.println("End of Program");    }} |
Output:
arr[0] = 1 arr[1] = 2 arr[2] = 3 arr[3] = 4 exit...
Reference :
https://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html
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