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Thread: Generic method using an int[] argument

  1. #1
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    Default Generic method using an int[] argument

    Hello,
    I have the following generic function declared.
    public static <T extends Comparable<? super T>> void selectionSort (T[] data)

    However eclipse will not compile saying:
    The method selectionSort(T[]) in the type writeInts is not applicable for the arguments (int[])


    Here is the call from main and the rest of the code

    	public static void main(String[] args) throws IOException {
    		// TODO Auto-generated method stub
    		boolean found = false;
    		final int DEFAULT_SIZE = 1000;
    		int[] rowValues = new int[DEFAULT_SIZE];
     
    		writeInts myWriteInts = new writeInts();
     
    		found = myWriteInts.selectionSort(rowValues);
    ;
     
    	}
     
    public static <T extends Comparable<? super T>> void selectionSort (T[] data)
    	    {
    	       int min;
    	       T temp;
     
    	       for (int index = 0; index < data.length-1; index++)
    	       {
    	          min = index;
    	          for (int scan = index+1; scan < data.length; scan++)
    	             if (data[scan].compareTo(data[min])<0)
    	                min = scan;
     
    	          /** Swap the values */
    	          temp = data[min];
    	          data[min] = data[index];
    	          data[index] = temp;
    	       }
    	    }


  2. #2
    Super Moderator helloworld922's Avatar
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    Default Re: Generic method using an int[] argument

    int is a primitive data type, and as such Java's generics can't handle them. Instead, try using the Integer wrapper class.

  3. The Following User Says Thank You to helloworld922 For This Useful Post:

    dubois.ford (March 18th, 2010)

  4. #3
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    Default Re: Generic method using an int[] argument

    Thanks that solved it.

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