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在java中重复String的简单方法

如何将数字转换为符号？我的任务的最后一部分是这样的:直方图应根据该值的滚动次数显示2-12的条形图.如下所示: 目前我的输出是这样的:

    public static void main(String[] args) {
    // TODO code application logic here
    System.out.print("Please enter how many times you want to roll two dice?");
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int [] rolls = new int[n];

    Random r1 = new Random();
    Random r2 = new Random();

    int dice1;
    int dice2;

    int two = 0;
    int three = 0;
    int four = 0;
    int five = 0;
     int six = 0;
    int seven = 0; …