1 添加依赖
<dependency>
<groupId>org.openjdk.jol</groupId>
<artifactId>jol-core</artifactId>
<version>0.9</version>
</dependency>
2 查看对象的内存布局
public class JolTest { static class T{ private int i = 10; } public static void main(String[] args) { T o = new T(); String s = ClassLayout.parseInstance(o).toPrintable(); System.out.println(s); } }
3 执行结果