第十四章 上机练习2......

public class Student {String[] names = new String[30];public void addName(String name) {for (int i = 0; i < names.length; i++) {if (names[i] == null) {names[i] = name;break;}}}public void showName() {for (int i = 0; i < names.length; i++) {if (names[i] == null) {break;}System.out.print(names[i] + " ");}}public boolean editName(String oldName, String newName) {boolean find = false;for (int i = 0; i < names.length; i++) {if (names[i] != null) {// /////////////////if (names[i].equals(oldName)) {names[i] = newName;find = true;break;}}}return find;}}

import java.util.Scanner;public class TestStudent {/** * @param args */public static void main(String[] args) {Student s = new Student();Scanner input = new Scanner(System.in);for (int i = 0; i < 5; i++) {System.out.println("请输入客户姓名:");String newName = input.next();s.addName(newName);}System.out.println("**********");System.out.println("客户姓名列表");System.out.println("***********");s.showName();System.out.println("\n请输入要修改的客户姓名:");String oldName = input.next();System.out.println("请输入新的客户姓名:");String newName = input.next();if (s.editName(oldName, newName)) {System.out.println("修改结果");System.out.println("找到修改成功");} else {System.out.println("没有找到");}System.out.println("**********");System.out.println("客户姓名列表");System.out.println("***********");s.showName();}}