java英语面试题大集合
Q1.HowcouldJavaclassesdirectprogrammessagestothesystemconsole,buterrormessages,saytoafile?.TheclassSystemhasavariableoutthatrepresentsthestandardoutput,andthevariableerrthatrepresentsthestandarderrordevice.Bydefault,theybothpointatthesystemconsole.Thishowthestandardoutputcouldb
暂无评论