Question

I have a question. I am trying to display the maximum value’s index in an array. I was able to obtain the maximum value; however, I don’t know to display the index for that maximum value.

For instance, if index [3] had a value of 5 and were the largest element in an array, it would print:

value[3] = 5 is the largest element

How do I do that?

    import java.util.Scanner;

    public class ArrayExample 
    {
            public static void main(String[] args) 
        {
            //Question 1
            int values[] = new int[5] ;
            System.out.println("Please enter 5 values for this array: ");
            Scanner keyboard = new Scanner(System.in);


              System.out.println("Maximum Value = " + getMaxIndex(values) + getMaxValue(values));  
        }

        public static int getMaxValue(int[] values){  
            int maxValue = values[0];  
            for(int i=0;i<values.length;i++){  
                if(values[i] > maxValue){  
                    maxValue = values[i];  
            }  
            }  
        return maxValue;  
    } 
    public static int getHighestMonth(int[] values) {
            int highest = 0;
            for (int i = 0; i < 5; i++) {
                if (values[i] > values[highest]) {
                    highest = i;
                }
            }
            return highest;
        }

}

Answer 1

You could use AbstractMap.SimpleEntry:

public static SimpleEntry<Integer, Integer> getMaxValue(int[] values){  
    int maxValue = Integer.MIN_VALUE;
    int maxIndex = -1;
    for(int i=0;i<values.length;i++){  
        if(values[i] >= maxValue){  
            maxValue = values[i];
            maxIndex = i;
        }  
    }
    return new SimpleEntry<Integer, Integer>( maxIndex, maxValue);
}

public static void main(String[] args) {
    SimpleEntry<Integer, Integer> maxEntry = getMaxValue( new int[]{1,2,3});

    System.out.println( "value["+ maxEntry.getKey() + "] = " + maxEntry.getValue() + " is the largest element");
    //value[2] = 3 is the largest element

}