package com.tswinter;
import org.openjdk.jol.vm.VM;
import sun.misc.Unsafe;
import java.lang.reflect.Field;
public class Test {
int a = 10;
final static int i = 99;
String name = "maxuan";
public static void main(String[] args) throws Exception{
Field theUnsafeInstance = Unsafe.class.getDeclaredField("theUnsafe");
theUnsafeInstance.setAccessible(true);
Unsafe unsafe = (Unsafe) theUnsafeInstance.get(null);
Field iField = Test.class.getDeclaredField("i");
long iOffset = unsafe.staticFieldOffset(iField);
Object obj = unsafe.staticFieldBase(iField);
System.out.println("i的偏移量: " + iOffset);
System.out.println("i的值: " + unsafe.getInt(obj, iOffset));
// Main t = new Main();
// System.out.println(ClassLayout.parseInstance(t).toPrintable());
// System.out.println(Long.toHexString(VM.current().addressOf(Test.class)));
// Thread.sleep(Long.MAX_VALUE);
}
}
