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来自「an excellent java tutorial for the ones 」· HTM 代码 · 共 64 行

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 <TITLE>java.lang.System</TITLE> 
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<P>Slide 68 of 101</P>
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<!-- <UL>
<H2>java.lang.System</H2>
<BR></UL></P>
<P><UL>
<LI> A number of useful class fields and methods.
</UL><UL>
<LI> Always available (static). 
</UL><UL>
<LI> Cannot be instantiated. 
</UL><UL>
<LI> Access to externally defined properties. 
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<LI> Streams in,out,err.
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<LI>
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    void arraycopy(Object, int, Object, int, int) 
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    Properties getProperties()
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    void  setProperties(Properties)
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    String getProperty(String)
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    String getProperty(String, String)
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    void exit(int)
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    void load(String)
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    void loadLibrary(String) Streams  :
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