不带R的墨菲特

摘要： ### log output control D is debug log output is or not ,E is ERROR OUTPUT is or not control by have D ,E manual control log4j.rootLogger = error,stdou 阅读全文

摘要： package iter; import java.util.*; public class iterdemo { public static void main(String[] args) { // 用来迭代容器的,next() ,hasNext(),set 不可以for循环 Set set = 阅读全文