What happens when the following program is compiled and run.

Question

public class example 
{
     int i[] = {0};
         public static void main(String args[])
    {
         int i[] = {1};
          change_i(i);
          System.out.println(i[0]);
      }
      public static void change_i(int i[]) 
       {
         i[0] = 2;
         i[0] *= 2;
      }
}

Answer 1

The program prints 4.

Answer 2

compilation info
Main.java:8: error: class example is public, should be declared in a file named example.java
public class example
^
1 error

Answer 3

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */

class example 
{
     int i[] = {0};
         public static void main(String args[])
    {
         int i[] = {1};
          change_i(i);
          System.out.println(i[0]);
      }
      public static void change_i(int i[]) 
       {
         i[0] = 2;
         i[0] *= 2;
      }
}

Output:

4