Map集合编写简单的单选题管理系统

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Map集合编写简单的单选题管理系统

测试类（Demo）

package 单选题管理系统;import java.util.Map;
import java.util.TreeMap;public class Demo {public static void main(String[] args) {// TODO 自动生成的方法存根Map<Integer, Testdanxuan> map=new TreeMap<Integer, Testdanxuan>();Testdanxuan.menu(map);//在Testdanxuan类中编写menu方法，用来执行单选题管理系统，此处直接调用}}

主类（Testdanxuan）

package 单选题管理系统;import java.io.ObjectInputFilter.Status;
import java.util.Map;
import java.util.Objects;
import java.util.Scanner;public class Testdanxuan {private String genji;//题干private String optionA;private String optionB;private String optionC;private String optionD;//题目的选项private String answer;//答案 private boolean status=false;public Testdanxuan() {super();}public Testdanxuan( String genji, String optionA, String optionB, String optionC, String optionD,String answer, boolean status) {super();this.genji = genji;this.optionA = optionA;this.optionB = optionB;this.optionC = optionC;this.optionD = optionD;this.answer = answer;this.status = status;}public String getGenji() {return genji;}public void setGenji(String genji) {this.genji = genji;}public String getOptionA() {return optionA;}public void setOptionA(String optionA) {this.optionA = optionA;}public String getOptionB() {return optionB;}public void setOptionB(String optionB) {this.optionB = optionB;}public String getOptionC() {return optionC;}public void setOptionC(String optionC) {this.optionC = optionC;}public String getOptionD() {return optionD;}public void setOptionD(String optionD) {this.optionD = optionD;}public String getAnswer() {return answer;}public void setAnswer(String answer) {this.answer = answer;}public boolean isStatus() {return status;}public void setStatus(boolean status) {this.status = status;}@Overridepublic int hashCode() {return Objects.hash(answer, genji, optionA, optionB, optionC, optionD, status);}@Overridepublic boolean equals(Object obj) {if (this == obj)return true;if (obj == null)return false;if (getClass() != obj.getClass())return false;Testdanxuan other = (Testdanxuan) obj;return Objects.equals(answer, other.answer) && Objects.equals(genji, other.genji)&& Objects.equals(optionA, other.optionA) && Objects.equals(optionB, other.optionB)&& Objects.equals(optionC, other.optionC) && Objects.equals(optionD, other.optionD)&& status == other.status ;}@Overridepublic String toString() {return "."+genji+"\n"+optionA+"\n"+optionB+"\n"+optionC+"\n"+optionD+"\n"+"答案: "+answer+"\n"+"删除状态: "+status;}public static void menu(Map<Integer, Testdanxuan> map) {map.put(1, new Testdanxuan("小白兔喜欢吃的是：","A:小鱼","B:松果","C:胡萝卜","D:辣椒","D",false));while(true) {System.out.println("====================================");System.out.println("==============单选题考试系统============");System.out.println("====================================");System.out.println("1.显示题库；2.查看试题；3.删除试题；4.添加试题；5.退出系统");System.out.println("(操作说明：请输入操作代码1或2或3或4。)");System.out.println("====================================");System.out.println("请输入操作代码：");Scanner sc=new Scanner(System.in);int n=sc.nextInt();switch (n) {case 1: showExam(map);break;case 2:findExam(map);break;case 3:deleteExam(map);case 4:addExam(map);case 5:System.out.println("谢谢使用单选题考试系统！");System.exit(0);default:throw new IllegalArgumentException("Unexpected value: " + n);}}}public static void showExam(Map<Integer, Testdanxuan> map) {// TODO 自动生成的方法存根for(Map.Entry<Integer,Testdanxuan> i:map.entrySet()) {System.out.println(i.getKey()+""+i.getValue());}}public static void findExam(Map<Integer, Testdanxuan> map) {System.out.println("请输入您所需要查看的题号：");Scanner sc=new Scanner(System.in);int a=sc.nextInt();Integer A=new Integer(a);for(Map.Entry<Integer, Testdanxuan> i:map.entrySet()) {if(A.equals(i.getKey())) {System.out.println("查询到的题目为：");System.out.println(i.getKey()+""+i.getValue());}}}public static void deleteExam(Map<Integer, Testdanxuan> map) {System.out.println("请输入您所需要删除的题号：");Scanner sc=new Scanner(System.in);int a=sc.nextInt();Integer A=new Integer(a);for(Map.Entry<Integer, Testdanxuan> i:map.entrySet()) {if(A.equals(i.getKey())) {System.out.println("要删除的内容为："+i.getKey()+""+i.getValue());map.remove(A);System.out.println("删除成功！");}else {System.out.println("删除错误！没有该题号的内容！");}}}public static void addExam(Map<Integer, Testdanxuan> map) {System.out.println("请输入您所需要添加的题号：");Scanner sc=new Scanner(System.in);int m=sc.nextInt();//Integer M=new Integer(m);for(Map.Entry<Integer, Testdanxuan> i:map.entrySet()) {if(m==(i.getKey())) {System.out.println("此题号已有，请勿重复添加！请重新输入题号：");m=sc.nextInt();}Integer M=new Integer(m);System.out.println("请输入题干：");String genji=sc.next();System.out.println("请输入选项A：");String optionA=sc.next();System.out.println("请输入选项B：");String optionB=sc.next();System.out.println("请输入选项C：");String optionC=sc.next();System.out.println("请输入选项D：");String optionD=sc.next();System.out.println("请输入答案：");String answer=sc.next();boolean status=false;map.put(M, new Testdanxuan(genji,optionA,optionB,optionC,optionD,answer,status));System.out.println("添加成功！");System.out.println("是否返回到上一页面？Y/N");String kString=sc.next();if(kString.equals("Y")) {Testdanxuan.menu(map);}}}
}