getMaxValue(array);// get smallest numbergetMinValue(array);
You are calling the methods but not using the returned values.
System.out.println(getMaxValue(array));System.out.println(getMinValue(array));
You can try this too, If you don't want to do this by your method.
Arrays.sort(arr); System.out.println("Min value "+arr[0]); System.out.println("Max value "+arr[arr.length-1]);
Imho one of the simplest Solutions is: -
//MIN NUMBERCollections.sort(listOfNumbers);listOfNumbers.get(0);//MAX NUMBERCollections.sort(listOfNumbers);Collections.reverse(listOfNumbers);listOfNumbers.get(0);