摘要： package com.day14; public class Demo01 { public static char[] demo01(){ int i = 1234567890; String s ="qwertyuiopasdfghjklzxcvbnm"; String S=s.toUpperCase(); Stri... 阅读全文

摘要： package com.day13; public class Student { private String name; private String sex; public Student(){} public Student(String name,String sex){ this.name = name; this.... 阅读全文