我创建了一个名为teams的字符串数组和一个名为nums的int数组。NUM数组中的每个整数都对应于字符串数组中的团队。
ex：
蒙特利尔加拿大人= 1，芝加哥黑鹰= 2，等等
我需要从1-10中随机选择数字（对应于int [] num），并且必须继续进行此循环，直到整数数组中的每个元素一次调用。含义循环的末端，字符串数组中的每个团队都会在一次调用。这必须通过一段时间循环完成。我似乎无法弄清楚如何精确创建可以做到这一点的循环。
import java.util.Scanner;
public class Question1 {
public static void main(String[] args) {
//declare scanner
Scanner keyboard= new Scanner (System.in);
//display opening message
System.out.println("= 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 =");
System.out.println("= 0 0 =");
System.out.println("= 0 NHL Miniature Hockey Puck Vending Machine 0 =");
System.out.println("= 0 0 =");
System.out.println("= 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 =");
System.out.println("");
System.out.println("");
System.out.println("Hello, what is your first name? ");
//read user input
String name = keyboard.nextLine();
//Welcome message
System.out.println("Welcome " + name + "! Let's see how much money you will need to spend to get all of the pucks.");
//declaring 10 teams in a 1D array
String[] teams = {"Montreal Canadiens","Chicago Blackhawks","Boston Bruins","Toronto Maple Leafs","Vancouver Canucks","Ottawa Senators","Pittsburgh Penguins","Calgary Flames","New York Rangers","Edmonton Oilers"};
int[] nums = {1,2,3,4,5,6,7,8,9,10};
//random number from 1-10
while (
int RandomNum = (int)(Math.random()*10)+1;
使用列表/向量...
那么，您不再需要随机数，而只需要整理列表
List<String> teams = new Vector<>(Arrays.asList("Montreal Canadiens", "Chicago Blackhawks", "Boston Bruins",
"Toronto Maple Leafs", "Vancouver Canucks", "Ottawa Senators", "Pittsburgh Penguins", "Calgary Flames",
"New York Rangers", "Edmonton Oilers"));
int ts = teams.size();
for (int i = 0; i < ts; i++) {
System.out.println(teams.remove(0));
Collections.shuffle(teams);
}
this：
List<String> teamsList = new ArrayList<String>(Arrays.asList(teams));
while(!teamsList.isEmpty()){
int randomNum = (int)(Math.random()*teamsList.size());
String team = teamsList.remove(randomNum);
}
或：
List<String> teamsList = new ArrayList<String>(Arrays.asList(teams));
Collections.shuffle(teamsList);
while(!teamsList.isEmpty()){
String team = teamsList.remove(0);
}
edit1：如果您不想要团队名称，但是团队编号，只需替换团队 -> nums。
edit2：
导入这些类：
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
首先，如果您希望nums中的值与teams中的值相对应，则您将希望值在0开始，并在9结束，所以这样数字对应于团队的索引。
如果您想手动执行此操作，我建议您将随机选择的值移至正面的循环，例如：
int i = 0;
while(i<nums.length){
int randomIndex = i + (int)Math.random*(nums.length-i);
int temp = nums[i];
nums[i] = nums[randomIndex];
nums[randomIndex] = temp;
i++
}
然后，您可以再次循环浏览列表，并且您循环的值将是（psuedo）从1-10中随机。然后，如果需要排序，则可以对列表进行排序。
您可以洗牌，然后与环。
请看一下此解决方案https://stackoverflow.com/a/1520212/814304（只需使用wher-loop而不是for-loop）;
如果您的 nums数组中的数字应该是索引，我猜，任何其他答案都可以正常工作。我确实将您的问题解释为这样，因此您的数字应该是这种方式，并且可能是其他任何数字。
在这种情况下，我将创建一个Team类，如下所示。
团队
public class Team {
private static final String DELIMITER = " / ";
private String name;
private int number;
public Team(String name, int number) {
this.name = name;
this.number = number;
}
public String getName(){
return this.name;
}
public int getNumber(){
return this.number;
}
@Override
public String toString(){
return this.getName() + DELIMITER + this.getNumber();
}
}
MAIN
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// declare scanner
Scanner keyboard = new Scanner(System.in);
// display opening message
System.out.println("= 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 =");
System.out.println("= 0 0 =");
System.out.println("= 0 NHL Miniature Hockey Puck Vending Machine 0 =");
System.out.println("= 0 0 =");
System.out.println("= 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 =");
System.out.println("");
System.out.println("");
System.out.println("Hello, what is your first name? ");
// read user input
String name = keyboard.nextLine();
// Welcome message
System.out.println("Welcome " + name + "! Let's see how much money you will need to spend to get all of the pucks.");
List<Team> teams = new ArrayList<>();
teams.add(new Team("Montreal Canadiens", 1));
teams.add(new Team("Chicago Blackhawks", 2));
teams.add(new Team("Boston Bruins", 3));
teams.add(new Team("Toronto Maple Leafs", 4));
teams.add(new Team("Vancouver Canucks", 5));
teams.add(new Team("Ottawa Senators", 6));
teams.add(new Team("Pittsburgh Penguins", 7));
teams.add(new Team("Calgary Flames", 8));
teams.add(new Team("New York Rangers", 9));
teams.add(new Team("Edmonton Oilers", 10));
List<Team> visitedTeams = new ArrayList<>();
while (teams.size() > visitedTeams .size()) {
int randomNum = (int) (Math.random() * teams.size());
Team team = teams.get(randomNum);
if (!visitedTeams.contains(team)) {
visitedTeams.add(team);
}
}
// Close your scanner
keyboard.close();
System.out.println("Teams called: ");
visitedTeams.forEach(System.out::println);
}
}
note i 封闭键盘，您也可以在阅读用户的名字后可以执行此操作。另外，我不会从列表中删除团队，我可以想象您想保留他们进行进一步处理。
输出
= 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 =
= 0 0 =
= 0 NHL Miniature Hockey Puck Vending Machine 0 =
= 0 0 =
= 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 = 0 =
Hello, what is your first name?
MyName
Welcome MyName! Let's see how much money you will need to spend to get all of the pucks.
Teams called:
Chicago Blackhawks / 2
Toronto Maple Leafs / 4
Edmonton Oilers / 10
Boston Bruins / 3
Ottawa Senators / 6
Calgary Flames / 8
Vancouver Canucks / 5
Pittsburgh Penguins / 7
Montreal Canadiens / 1
New York Rangers / 9
这是NHL（国家曲棍球联盟）中的30支曲棍球队。一些商店的自动售货机可以将微型团队曲棍球冰球分配为Toonie（2美元）。当您放入Toonie时，您永远不会知道会得到哪种冰球；30个冰球中的任何一个都可能与其他机器分配。它们是随机分发的。对于此练习，我们将将团队限制在10。您的工作是编写一个程序，以模拟NHL微型冰球的分配，直到分发10个微型团队曲棍球冰球中的每一个。您的程序应如下以下操作：1.显示一条欢迎消息，并要求用户输入其名称。2.将您最喜欢的曲棍球队名称存储在一系列弦乐中。分配团队名称声明声明直接。3.您的程序应循环（使用时循环），直到每个团队的至少一个微型冰球已经分发了。创建一个大小10的整数阵列，该数组将用作计数器阵列，以跟踪自动售货机分配的每个团队的数量。您需要使用Math.random（）函数来随机分配微型冰球。Math.random（）方法返回一个带正符号的双值，大于或等于0.0或小于1.0。4.一旦您累积了至少每个冰球中的一个，请显示您必须购买多少个冰球，购买的冰球总数以及个性化消息中的总成本
1-一维数组＆amp;loops