扩展 jol 源码包 打印 Mark Word

参考: https://blog.csdn.net/qq_38505969/article/details/123446310

1、下载源码并进行方法扩展

2、pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.openjdk.jol</groupId>
        <artifactId>jol-parent</artifactId>
        <version>0.9</version>
    </parent>
    <!--自定义 jar 包名称-->
    <artifactId>jol-core-0.9-summer-extend</artifactId>
    <packaging>jar</packaging>

    <name>Java Object Layout: Core</name>
    <url>http://maven.apache.org</url>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <compilerVersion>1.8</compilerVersion>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
</project>

3、打包

扩展 toPrintableSimple() 方法代码

// 扩展方法
public String toPrintableSimple() {
	return toPrintableSimple(classData.instance());
}

public String toPrintableSimple(Object instance) {
	StringBuffer stringBuffer = new StringBuffer();

	if (instance != null) {
		VirtualMachine vm = VM.current();
		for (long off = 4; off >= 0; off -= 4) {
			int word = vm.getInt(instance, off);
			stringBuffer.append(toBinary((word >> 24)  & 0xFF) + " " + toBinary((word >> 16)  & 0xFF) + " " + toBinary((word >> 8) & 0xFF) + " " + toBinary((word >> 0) & 0xFF) + " ");
		}
	}
	return stringBuffer.toString();
}

扩展好的 jar 包下载链接：https://pan.baidu.com/s/1cr5R1OxwFU4WEtb3w1zpUw  提取码：i3qm