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Thread: Passing array method error

  1. #1
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    Default Passing array method error

    Trying to write a method that will pass an array of ints that counts the number of values that are larger than the average.
    Getting an out of bounds exception for the method along with an error when trying to invoke Methods.counts(array1);

    Tried minus/plus 1 for the array but still not working.

    Can anybody see the error?

    Thanks.

    Compiler error:
    Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 6
    at Methods.counts(Methods.java:16)
    at Main.main(Main.java:8)

    public class Methods {	
     
    	public static int counts(int[] array)
    	{
    		int sum = 0;
    		int count = 0;
     
    		for (int i = 0; i < array.length; i++)	
    		{
    			sum = sum + array[i];			
    			double average = sum/array.length;
     
    			for (int j = 0; j < array.length; i++)	
    			{
    				if (array[i] > average)	
    				{
    					count++;					
    				}
    			}
    		}
    		return count;
    	}	
    }

    public class Main {
     
     
    	public static void main(String[] args) {
     
    		int[] array1 = {1,2,3,4,5,10};
    		Methods.counts(array1);
    		System.out.println(Methods.counts(array1));
    	}
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Passing array method error

    Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 6
    at Methods.counts(Methods.java:16)
    The value in the index at line 16 goes past the end of the array.
    Remember array index values range from 0 to the array length-1

    Check the code to see how the index got past the end of the array.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Passing array method error

    Made a couple of silly mistakes. The working code below.

    Thanks.

    public class Methods {	
     
    	public int counts(int[] array)
    	{
    		int sum = 0;
    		int count = 0;		
     
    		for (int i = 0; i < array.length; i++)	
    		{			
    			sum = sum + array[i];	
    		}
    			double average = sum/array.length;
     
    			for (int i = 0; i < array.length; i++)	{				
    				if (array[i] > average)	
    				{					
    					count++;
    				}					
    			}			
    		return count;
    	}	
    }

    public class Main {
     
     
    	public static void main(String[] args) {
     
    		int[] array1 = {1,4,6,2,4,7,8,9};
    		Methods m1 = new Methods();
    		int result = m1.counts(array1);
    		System.out.println("Numbers above the average: " +result);
    	}
    }

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