Java利用 ClassLayout 查看对象头

<dependency>  
    <groupId>org.openjdk.jol</groupId>  
    <artifactId>jol-core</artifactId>  
    <version>0.9</version>  
</dependency>

CacheTest test = test();
System.out.println(ClassLayout.parseInstance(test.getList()).toPrintable());