查找数组中重复数据索引,该如何解决

查找数组中重复数据索引
有这样一个数组
String[]   arr   =   {10,20,45,20,10,50,50};
然后查找出重复数据的索引号
结果   0,1,3,4,5,6



[解决办法]

Java code

int[] arr = {10,20,45,20,10,50,50};          for(int i=0;i<arr.length;i++)        {            int tmp =arr[i];            for(int j=i+1;j<arr.length;j++)            {                if(arr[j]==tmp)                {                    System.out.println(i);                    System.out.println(j);                    break;                }            }        }
[解决办法]
Java code
String[]   arr   =   {"10","20","45","20","10","50","50"};        int count = 0;        System.out.println("重复数据索引:");        for(int i = 0; i < arr.length; i++){                        for(int j = 0; j < arr.length; j++){                                if(arr[i] == arr[j]){                                        count++;                }                            }                        if(count > 1){                                System.out.println(i);                count = 0;            }        }