还是为你帮他买对车票。

Jossc · Jossc · commit f2f6e4c5d5c5 · 2018-08-22T15:50:21.000+08:00
diff --git a/src/main/java/com/basics/UnsafeTest/unsafe_voliate/UnsafeTestTwo.java b/src/main/java/com/basics/UnsafeTest/unsafe_voliate/UnsafeTestTwo.java
@@ -0,0 +1,57 @@
+package com.basics.UnsafeTest.unsafe_voliate;
+
+import sun.misc.Unsafe;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+
+/**
+ * @ClassName UnsafeTestTwo
+ * @Description TODO
+ * @Author chenzhuo
+ * @Date 2018/8/22 11:20
+ * @Version 1.0
+ *
+ * pageSize :4096
+ * address  :8  变量指针的长度（4/8 32/64系统）
+ * anLong :12
+ **/
+public class UnsafeTestTwo {
+    public static Unsafe unsafe;
+    public int anInt;
+    public  static long anLong;
+    static {
+        try {
+            Field field = Unsafe.class.getDeclaredField("theUnsafe");
+            field.setAccessible(true);
+            unsafe = (Unsafe) field.get(null);
+            anLong = unsafe.objectFieldOffset(UnsafeTestTwo.class.getDeclaredField("anInt"));
+        } catch (NoSuchFieldException e) {
+            e.printStackTrace();
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static void main(String[] args) {
+        UnsafeTestTwo unsafeTestTwo = new UnsafeTestTwo();
+        System.out.println(" pageSize :" +unsafe.pageSize());
+        System.out.println("address  :" + unsafe.addressSize());
+        unsafe.putInt(UnsafeTestTwo.class,anLong,10);
+        int unsafeInt = unsafe.getInt(UnsafeTestTwo.class, anLong);
+        System.out.println("anInt: " + unsafeInt);
+        System.out.println("anLong : " + anLong);
+        unsafeTestTwo.testSys();
+    }
+
+    public  void testSys() {
+    /*    System. out. println("array scale "+unsafe .arrayIndexScale(ArrayList.class));*/
+        System. out . println("array scale "+unsafe. arrayIndexScale(UnsafeTestTwo[].class));
+        System. out . println("array scale "+unsafe. arrayIndexScale(Long.class));
+        System. out . println("array scale "+unsafe . arrayIndexScale(Boolean[].class));
+    /*    System. out . println("array i scale "+unsafe. arrayIndexScale(int[]. class));*/
+        System. out . println("array scale"+unsafe . arrayIndexScale(Integer.class));
+        System. out . println("array scale "+unsafe . arrayIndexScale(Byte.class));
+    }
+}
+
diff --git a/src/main/java/com/sun/proxy/Memony.java b/src/main/java/com/sun/proxy/Memony.java
@@ -0,0 +1,19 @@
+package com.sun.proxy;
+
+/**
+ * @ClassName Memony
+ * @Description TODO
+ * @Author chenzhuo
+ * @Date 2018/8/21 18:27
+ * @Version 1.0
+ **/
+public class Memony {
+    byte b;
+    int i ;
+    boolean aBoolean;
+    long e;
+    Object object;
+    public static void main(String[] args) {
+
+    }
+}
