java - 数组|使用数组除法查找重复整数？

Question

如何让该方法显示重复的数字。这似乎是一个逻辑错误阻止了我，我不知道为什么代码没有执行它应该执行的操作。

  public static void findRepeating(int[] arr) { 
        for (int i = 0; i< arr.length; i++) {
             for(int d = 0; d<arr.length; d++) {
                 if(arr[i] / arr[d] == 1) {
                     System.out.println(arr[i] + " is repeating");
                 }
             }
        }
    }


    public static void main(String[] args) {

        int[] myArray = {69, 7, 8, 9, 90, 666, 69, 420, 2};


        findRepeating(myArray);

    }

}

Answer 1

这里是对内部for循环中的逻辑和比较的更正

  public static void findRepeating(int[] arr) { 
    for (int i = 0; i< arr.length; i++) {
         for(int d = i+1; d<arr.length; d++) { //check with next element, as u will iterate over same element if iterating from start
             if(arr[i] == arr[d]) { // checking for same number, as division can give 1 in multiple case for ex 11/7 is also 1
                 System.out.println(arr[i] + " is repeating");
             }
         }
    }
}