system.in java
Java的标准输入System.in是InputStream类的对象，当程序中需要从键盘读取数据的时候只需调用System.in的read()方法即可。例如：```charch;try{ch= ...,TheSystemclassarestandardinput,standardoutput,anderroroutputstreams;accesstoexternallydefinedpropertiesan...
Systemisaclassinjava.Itholdsacollectionofstaticmethodsandvariables.Thestandardinput,output,anderroroutputoftheJavarun ...
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