模拟KTV点歌系统

分别使用LinkedList和ArrayList集合，实现编写一个模拟KTV点歌系统的程序

KTVByArrayList.java

import java.util.ArrayList;

import java.util.Scanner;

public class KTVByArrayList {

public static void main(String[] args) {

int choice ;

ArrayList MusicList=new ArrayList();

Scanner scanner=new Scanner(System.in);

show();

Init(MusicList);

System.out.println("请输入你要执行的操作序号");

if(scanner.hasNextInt()) {

choice=scanner.nextInt();

}else {

choice=4;

}

while (choice!=3)

{

switch (choice) {

case (0):

addMusic(MusicList);

break;

case (1):

moveMusicFirst(MusicList);

break;

case (2):

moveMusicBefore(MusicList);

break;

default:

System.out.println("请输入0-2数字");

break;

}

show();

System.out.println("请输入你要执行的操作序号");

if(scanner.hasNextInt()) {

choice=scanner.nextInt();

}else {

choice=4;

}

System.out.println("当前歌曲列表："+MusicList);

}

System.out.println("--------------------退出-----------------------");

System.out.println("你已退出系统");

}

static void show(){

System.out.println("------------------------欢迎来到点歌系统-----------------------------");

System.out.println("0.添加歌曲至列表");

System.out.println("1.将歌曲置顶");

System.out.println("2.将歌曲移至前一位");

System.out.println("3.退出");

}

static void Init(ArrayList MusicList)

{

MusicList.add("稻香");

MusicList.add("夜曲");

MusicList.add("夜的第七章");

MusicList.add("听妈妈的话");

MusicList.add("龙卷风");

System.out.println("初始歌曲列表："+MusicList);

}

static void addMusic(ArrayList MusicList)

{

System.out.println("请输入你要添加的歌曲名称：");

Scanner scanner=new Scanner(System.in);

String MusicName=scanner.nextLine();

MusicList.add(MusicName);

System.out.println("已加入歌曲："+MusicList.get(MusicList.size()-1));

System.out.println("当前歌曲列表"+MusicList);

}

static void moveMusicFirst(ArrayList MusicList)

{

System.out.println("请输入你要置顶歌曲的名称：");

Scanner scanner=new Scanner(System.in);

String MusicName=scanner.nextLine();

//判断有没有这首歌

for(Object i:MusicList)

{

if(i.equals(MusicName))

{

MusicList.remove(MusicName);

MusicList.add(0,MusicName);

System.out.println("已将歌曲"+MusicName+"置顶");

return;

}

}

System.out.println("没有这首歌");

}

static void moveMusicBefore(ArrayList MusicList)

{

System.out.println("请输入你要置前歌曲的名称：");

Scanner scanner=new Scanner(System.in);

String MusicName=scanner.nextLine();

//判断有没有这首歌

for(int i=0;i

{

if((MusicList.get(i)).equals(MusicName))

{

MusicList.add(i-1,MusicName);

MusicList.remove(i+1);

System.out.println("已将歌曲"+MusicList.get(0)+"置前");

return;

}

}

System.out.println("没有这首歌");

}

}

KTVByLinkedList.java

import java.util.LinkedList;

import java.util.Scanner;

public class KTVByLinkedList {

public static void main(String[] args) {

int choice ;

LinkedList MusicList=new LinkedList();

Scanner scanner=new Scanner(System.in);

show();

Init(MusicList);

System.out.println("请输入你要执行的操作序号");

if(scanner.hasNextInt()) {

choice=scanner.nextInt();

}else {

choice=4;

}

while (choice!=3)

{

switch (choice) {

case (0):

addMusic(MusicList);

break;

case (1):

moveMusicFirst(MusicList);

break;

case (2):

moveMusicBefore(MusicList);

break;

default:

System.out.println("请输入0-2数字");

break;

}

show();

System.out.println("请输入你要执行的操作序号");

if(scanner.hasNextInt()) {

choice=scanner.nextInt();

}else {

choice=4;

}

System.out.println("当前歌曲列表："+MusicList);

}

System.out.println("--------------------退出-----------------------");

System.out.println("你已退出系统");

}

static void show(){

System.out.println("------------------------欢迎来到点歌系统-----------------------------");

System.out.println("0.添加歌曲至列表");

System.out.println("1.将歌曲置顶");

System.out.println("2.将歌曲移至前一位");

System.out.println("3.退出");

}

static void Init(LinkedList MusicList)

{

MusicList.add("稻香");

MusicList.add("夜曲");

MusicList.add("夜的第七章");

MusicList.add("听妈妈的话");

MusicList.add("龙卷风");

System.out.println("初始歌曲列表："+MusicList);

}

static void addMusic(LinkedList MusicList)

{

System.out.println("请输入你要添加的歌曲名称：");

Scanner scanner=new Scanner(System.in);

String MusicName=scanner.nextLine();

MusicList.add(MusicName);

System.out.println("已加入歌曲："+MusicList.getLast());

System.out.println("当前歌曲列表"+MusicList);

}

static void moveMusicFirst(LinkedList MusicList)

{

System.out.println("请输入你要置顶歌曲的名称：");

Scanner scanner=new Scanner(System.in);

String MusicName=scanner.nextLine();

//判断有没有这首歌

for(Object i:MusicList)

{

if(i.equals(MusicName))

{

MusicList.remove(MusicName);

MusicList.addFirst(MusicName);

System.out.println("已将歌曲"+MusicList.getFirst()+"置顶");

return;

}

}

System.out.println("没有这首歌");

}

static void moveMusicBefore(LinkedList MusicList)

{

System.out.println("请输入你要置前歌曲的名称：");

Scanner scanner=new Scanner(System.in);

String MusicName=scanner.nextLine();

//判断有没有这首歌

for(int i=0;i

{

if((MusicList.get(i)).equals(MusicName))

{

MusicList.add(i-1,MusicName);

MusicList.remove(i+1);

System.out.println("已将歌曲"+MusicName+"置前");

return;

}

}

System.out.println("没有这首歌");

}

}