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August 29, 2015 13:59
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class Foo { | |
private Helper helper = null; | |
public Helper getHelper() { | |
if (helper == null) { | |
synchronized (this) { | |
if (helper == null) { | |
helper = new Helper(); | |
} | |
} | |
} | |
return helper; | |
} | |
} |
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