PrivateTest.java

import java.lang.reflect.*;

class Foo
{
    private int i = 10;
   
    public int getI() { return i; }
}

class PrivateTest
{
    public static void main(String[] args)
      throws Exception
    {
        Foo bar = new Foo();
        Field[] f = 
        bar.getClass().getDeclaredFields();

 for (Field test : f) {
   /* The following operation depends on 
   the installed security manager */
   test.setAccessible(true);
   /* Changing i from outside the class */
   test.setInt(bar, 5); 
 }
        System.out.println(bar.getI());
    }
}