如何从Java中的数组中打印出一个随机的字符串

Question

嗨我一直试图让我的第一场比赛有一段时间，但遇到困难。我想从字符串数组中抽取一个随机字符串，然后将其打印出来，但是我的代码中有错误。我查看了所有，但我找不到解决方案。下面是代码： （我已经宣布currentRoom varible）

 int currentRoom; 
String [][] rooms = {{"Start", "Treasure Room1"}, {"Goblin Home1", "Spider Nest1"}}; 

Random rand = new Random() 
currentRoom = rooms [rand.nextInt(rooms.length)]; 


System.out.println(currentRoom); 

我对在第6行我currentRoom变量的错误，我认为这是搞乱了一切，但我不知道这样的错误可能在任何地方。

任何帮助表示赞赏:)

Answer 1

两件事情你必须改变：

1. currentRoom应该是字符串数组

2. 打印字符串数组以Arrays.toString

   完成

     String[] currentRoom; 
       String [][] rooms = {{"Start", "Treasure Room1"}, {"Goblin Home1", "Spider Nest1"}}; 
   
       Random rand = new Random(); 
   
       currentRoom = rooms [rand.nextInt(rooms.length)]; 
   
   
       System.out.println(Arrays.toString(currentRoom)); 
   

样本输出

[Goblin Home1, Spider Nest1] 

希望这有助于！

Answer 2

String currentRoom; 
String [][] rooms = {{"Start", "Treasure Room1"}, {"Goblin Home1", "Spider Nest1"}}; 

Random rand = new Random(); 
int rnd = rand.nextInt(rooms.length); 
currentRoom = rooms [rnd][0] + ":"+ rooms [rnd][1]; 

System.out.println(currentRoom); 

Answer 3

为什么你需要一个二维数组的字符串？ 我想你可以使用一维数组来管理。

String currentRoom; 
String[] rooms = {"Start", "Treasure Room1", "Goblin Home1", "Spider Nest1"}; 
Random rand = new Random(); 
currentRoom = rooms [rand.nextInt(rooms.length)]; 

System.out.println(currentRoom);