How to reverse all the numbers in an array of integers

public class ReverseAnArray {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		//Initialized the array values, and initialize the start Index to default 0
		int []  numArray= {21,98,42,59,79,65,32};
		int startIdx= 0, rearIdx;

		System.out.println("Array values - Before reversing numbers");
		dispArray(numArray);

		//Calculate the rear Index position in the array based on the array length
		rearIdx= numArray.length-1;

		/*Start swapping the numbers at first and last positions of the array,
        do continue swapping numbers by increasing first index to the next higher 
        index, and by decreasing last index to next lower index, until 
        those positions cross each or have same value*/

		while (startIdx<=rearIdx) {
			int tempNum=numArray[startIdx];
			numArray[startIdx]=numArray[rearIdx];
			numArray[rearIdx]=tempNum;
			startIdx += 1;
			rearIdx -= 1;
		}
		System.out.println("Array values - After Reversing Numbers at all positions");
		dispArray(numArray);
	}

	// Function to display the array values in some specific format
	private static void dispArray(int[] varArray) {

		System.out.print("[ ");
		for (int i=0;i<varArray.length;i++) {
			System.out.print(varArray[i]+" ");
		}
		System.out.println("]");
	}
}