摘要：
package javaOffer;public class o02_replaceSpace { public static void main(String[] args){ StringBuffer str=new StringBuffer(" 12 ab cd e f g"); String 阅读全文
摘要：
package javaOffer;public class o01_findNumber { public static void main(String[] args) { int[][] arr={{1,2,3},{4,5,6},{7,8,9}}; System.out.println(Fin 阅读全文