生成随机字母异位词

场景

在做算法题的时候，有时候需要生成数据用来本地测试

生成代码

public static <T> String printArray(T[] array, String delimiter, String prefix, String suffix){
   StringBuilder builder = new StringBuilder();
   builder.append(prefix);
   for (Object o  : array){
       builder.append(String.valueOf(o)).append(delimiter);
   }
   builder.replace(builder.length()-delimiter.length(), builder.length(), suffix);
   return builder.toString();
}
    
public static String[] randomAnagram(String s, int size){
    String[] result = new String[size];
    char[] chars = s.toCharArray();
    int times;
    for(int i=0; i<size; i++){
        times = random.nextInt(500);
        while (times>0){
            times--;
            randomSwapCharArray(chars);
        }
        result[i] = new String(chars);
    }
    return result;
}

private static void randomSwapCharArray(char[] chars){
    int a,b,len=chars.length;
    char temp;
    a = random.nextInt(len);
    b = random.nextInt(len);
    temp = chars[a];
    chars[a]= chars[b];
    chars[b] = temp;
}

public static void main(String[] args) {
//        System.out.println(printArray(randomAnagram("abcdefghijklmnopqrstuvwxyz", 250), "\",\"", "\"", "\""));
    System.out.println(printArray(randomAnagram("ksytj", 40), "\",\"", "\"", "\""));
}

示例

代码示例