摘要：public class jiaodashu { public static void main(String[] args) { Teacher t = new Teacher(); //Student s = new Student(); t.setName("小李"); t.setAge(30 阅读全文

摘要：public class jiaodashu { public static void main(String[] args) { String str = "abcde"; StringBuilder str0 = new StringBuilder; str0.append(str); //将s 阅读全文

摘要：import java.util.Scanner; import java.util.ArrayList; import java.util. ; //主界面 / 1、用输出语句完成主界面的编写 2、用Scannner实现键盘录入 3、用switch完成操作选择 4、循环回到主界面 / public 阅读全文