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Java code:

import java.lang.reflect.Field;
import java.util.Date;

import sun.misc.Unsafe;

public class Person {

private int age;

private String name;

private Date birthday;

public Person(String name, int age , Date date) {
super();
this.name = name;
this.age = age;
this.birthday = date;
}

/**
* @param args
*/
public static void main(String[] args) {
Class<?> clazz = Unsafe.class;
Person p = new Person("zhangsan", 24,new Date());

try {
Field f = clazz.getDeclaredField("theUnsafe");
f.setAccessible(true);
Unsafe unsafe = (Unsafe) f.get(clazz);
System.out.println(unsafe.getObject(p, 8L));
System.out.println(unsafe.getObject(p,12L));
System.out.println(unsafe.getInt(p,16L));
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
}
}




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