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sc
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===
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> 查看JVM已加载的类信息
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“Search-Class” 的简写，这个命令能搜索出所有已经加载到 JVM 中的 Class 信息，这个命令支持的参数有 `[d]`、`[E]`、`[f]` 和 `[x:]`。
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参数说明
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---
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### 参数说明
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|参数名称|参数说明|
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|---:|:---|
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|*class-pattern*|类名表达式匹配|
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|*method-pattern*|方法名表达式匹配|
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|[d]|输出当前类的详细信息，包括这个类所加载的原始文件来源、类的声明、加载的ClassLoader等详细信息。<br/>如果一个类被多个ClassLoader所加载，则会出现多次|
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|[E]|开启正则表达式匹配，默认为通配符匹配|
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|[f]|输出当前类的成员变量信息（需要配合参数-d一起使用）|
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|[x:]|指定输出静态变量时属性的遍历深度，默认为 0，即直接使用 `toString` 输出|
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> class-pattern支持全限定名，如com.taobao.test.AAA，也支持com/taobao/test/AAA这样的格式，这样，我们从异常堆栈里面把类名拷贝过来的时候，不需要在手动把`/`替换为`.`啦。
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> sc 默认开启了子类匹配功能，也就是说所有当前类的子类也会被搜索出来，想要精确的匹配，请打开`options disable-sub-class true`开关
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### 使用参考
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* 模糊搜索
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```bash
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$ sc demo.*
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demo.MathGame
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Affect(row-cnt:1) cost in 55 ms.
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```
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* 打印类的详细信息
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```bash
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$ sc -d demo.MathGame
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class-info demo.MathGame
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code-source /private/tmp/arthas-demo.jar
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name demo.MathGame
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isInterface false
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isAnnotation false
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isEnum false
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isAnonymousClass false
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isArray false
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isLocalClass false
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isMemberClass false
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isPrimitive false
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isSynthetic false
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simple-name MathGame
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modifier public
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annotation
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interfaces
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super-class +-java.lang.Object
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class-loader +-sun.misc.Launcher$AppClassLoader@3d4eac69
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+-sun.misc.Launcher$ExtClassLoader@66350f69
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classLoaderHash 3d4eac69
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Affect(row-cnt:1) cost in 875 ms.
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```
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* 打印出类的Field信息
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```bash
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$ sc -d -f demo.MathGame
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class-info demo.MathGame
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code-source /private/tmp/arthas-demo.jar
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name demo.MathGame
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isInterface false
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isAnnotation false
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isEnum false
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isAnonymousClass false
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isArray false
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isLocalClass false
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isMemberClass false
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isPrimitive false
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isSynthetic false
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simple-name MathGame
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modifier public
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annotation
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interfaces
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super-class +-java.lang.Object
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class-loader +-sun.misc.Launcher$AppClassLoader@3d4eac69
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+-sun.misc.Launcher$ExtClassLoader@66350f69
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classLoaderHash 3d4eac69
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fields modifierprivate,static
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type java.util.Random
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name random
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value java.util.Random@522b4
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08a
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modifierprivate
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type int
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name illegalArgumentCount
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Affect(row-cnt:1) cost in 19 ms.
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```
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