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标准输入/输出流

[英]Standard in-/output stream

How is the System class structured/designed with regard to the standard in-/output? 关于标准输入/输出,如何构造/设计System类?

The System class has a public final out method that returns a PrintStream . System类具有公共的final out方法,该方法返回PrintStream Is the println() method then a nested method or how does that exactly work if I call System.out.println(); println()方法然后是一个嵌套方法,或者如果我调用System.out.println();该方法到底如何工作System.out.println(); ?

out is a public static final variable, and since it's static, one can get out as System.out (ie in a static manner). out是一个public static final变量,由于它是静态的,因此可以作为System.out out (即以静态方式)。

out is a PrintStream which contains the println() method, and you're accessing the println() method from the PrintStream (ie, from out ). out是一个包含println()方法的PrintStream ,并且您正在从PrintStream (即,从out )访问println()方法。

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