Java 从字符串数组中选择一个随机元素？
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Pick a random element from a string array?
提问by Logger
I've got this code, which (I hope) reads from a text file with 66 words and puts the words into an array.
我有这个代码，它（我希望）从一个包含 66 个单词的文本文件中读取并将这些单词放入一个数组中。
BufferedReader buff = null;
String wordlist=new String[66];
int i=0;
try {
buff = new BufferedReader(new FileReader("C:\easy.txt"));
wordlist[i] = buff.readLine();
while(wordlist[i] != null&i<66){
wordlist[i]=buff.readLine();
i++;
}
}
I want to pick a random word from the array. However trying a few things myself and looking at other questions doesn't seem to work. Any help would be appreciated
我想从数组中随机选择一个单词。然而，自己尝试一些事情并查看其他问题似乎不起作用。任何帮助，将不胜感激
回答by Abdul
Generate a random number between 0 and 65, and then use that number as the index of which String you choose.
生成一个 0 到 65 之间的随机数，然后使用该数字作为您选择的 String 的索引。
回答by David Koelle
This should work:
这应该有效：
String randomString = wordlist[(int)(Math.random() * wordlist.length)];
回答by Phil
You can create a random number generator (an instance of Random).
您可以创建一个随机数生成器（Random 的一个实例）。
Then you call the method nextInt(wordList.length) to get a random index on your array of string.
然后调用 nextInt(wordList.length) 方法来获取字符串数组的随机索引。
For example:
例如：
Random random = new Random(); int index = random.nextInt(wordList.length);
随机随机=新随机（）；int index = random.nextInt(wordList.length);
Then: wordList[index] to get the randomly selected string.
然后： wordList[index] 得到随机选择的字符串。
回答by Bohemian
The simplest code IMHO would be:
恕我直言，最简单的代码是：
String word = wordlist[new Random().nextInt(wordlist.length)];
回答by Zavax
One solution is to is to select a random number from the wordlist array by doingString = randomWord = wordlist[(int)Math.random() * wordlist.length]
or String randomWord = wordlist[(int)Math.random() * 66]
一种解决方案是通过执行String = randomWord = wordlist[(int)Math.random() * wordlist.length]
或从 wordlist 数组中选择一个随机数String randomWord = wordlist[(int)Math.random() * 66]
