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dump
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===
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> Dump the bytecode for the particular classes to the specified directory.
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### Options
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|Name|Specification|
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|---:|:---|
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|*class-pattern*|class name pattern|
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|`[c:]`|hashcode of the [class loader](classloader.md) that loaded the target class|
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|`[E]`|turn on regex match, the default behavior is wild card match|
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### Usage
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```bash
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$ dump java.lang.String
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HASHCODE CLASSLOADER LOCATION
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null /Users/admin/logs/arthas/classdump/java/lang/String.class
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Affect(row-cnt:1) cost in 119 ms.
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```
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```bash
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$ dump demo.*
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HASHCODE CLASSLOADER LOCATION
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3d4eac69 +-sun.misc.Launcher$AppClassLoader@3d4eac69 /Users/admin/logs/arthas/classdump/sun.misc.Launcher$AppClassLoader-3d4eac69/demo/MathGame.class
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+-sun.misc.Launcher$ExtClassLoader@66350f69
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Affect(row-cnt:1) cost in 39 ms.
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```
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