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 P_AI
{
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...