android - 不带逗号的拆分字符串

Question

我有一个生成 9 个随机数的方法，并且至少我将它们存储在一个字符串中以便在控制台上显示。这是函数:

public static String GenerateNumbers(){
    int[] NumberList = new int[9];

    for (int i = 0; i < 9; i++){
        NumberList[i] = (int) Math.floor(Math.random()*(100-10+1)+10);
    }
    Arrays.sort(NumberList);
    String[] ar = Arrays.toString(NumberList).split("[\\[\\]]")[1].split(", ");
    String a = Arrays.toString(ar);
    return a;
}

当我在控制台上看到这个字符串时，就像:[20, 28, 33, 46, 46, 57, 81, 83, 90]

我需要看到的是:[20 28 33 46 46 57 81 83 90]

如果是:20 28 33 46 46 57 81 83 90 就完美了

Answer 1

在返回字符串之前添加一行代码，您将获得完美的输出:

public static String GenerateNumbers(){
    int[] NumberList = new int[9];

    for (int i = 0; i < 9; i++){
        NumberList[i] = (int) Math.floor(Math.random()*(100-10+1)+10);
    }
    Arrays.sort(NumberList);
    String[] ar = Arrays.toString(NumberList).split("[\\[\\]]")[1].split(", ");
    String a = Arrays.toString(ar);

    //add this line to remove characters you don't need
    a = a.replace("[", "").replace(",", "").replace("]", "");

    return a;
}