Sort an integer array, keeping first in place

Question

How would I sort arrays as follows:

[10, 7, 12, 3, 5, 6] --> [10, 12, 3, 5, 6, 7]

[12, 8, 5, 9, 6, 10] --> [12, 5, 6, 8, 9, 10] 

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Answer 1

I'm using Java:

     int[] arr = {10, 7, 12, 3, 5, 6};
     List arr_1 = new ArrayList();
     for(int i = 0; i < arr.length; i++)
     {
         arr_1.add(arr[i]);
     }
     Collections.sort(arr_1.subList(1,arr_1.size()));


    System.out.println(arr_1);