Increment individual values in array Java

Question

I want to know how to increment certain indexes in an array.

int indexArrayHIS[] = new int[15];
int indexArrayFIX[] = new int[20];

indexArrayHIS[] is an array consisting out of index values: 6 9 9 17 0 19 16 1 0 7 1 18 16 8 10

I want fill indexArrayFIX[] with the number of each index instance. For example, there are 2 "9s" so at index 9 of indexArrayFIX[] I want to display a 2:

indexArrayFIX[] should output:

2 2 0 0 0 0 1 1 1 2 1 0 0 0 0 0 2 1 1 1 0

Hope this makes sense

Thanks

Valdrinium · Accepted Answer · 2017-12-01 16:53:29Z

2

Why not just?

for (int i = 0; i < indexArrayHIS.length; i++) {
    indexArrayFIX[indexArrayHIS[i]]++;
}

answered Dec 1, 2017 at 16:53

Valdrinium

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1 Comment

Brendan van Biljon Over a year ago

Thanks that seems to be on the right track. I used two for loops because of the difference in length of the arrays and I got: 40 40 0 0 0 0 20 20 20 40 20 0 0 0 0 0 40 20 20 20 0

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