/**

* Write a method called reverseArray() with the following signature:

*

* public static void reverseArray(int[] intArray)

*

* The method accepts an int array, and reverses its orders.

* For example, if the input array is {12, 56, 34, 79, 26},

* the reversal is {26, 79, 34, 56, 12}.

*

* 1. You MUST NOT use another array in your method (but you need a temporary

* variable to do the swap).

*

* 2. Take note that the array passed into the method can be modified by the method

* (this is called "pass by reference"). On the other hand, primitives passed

* into a method cannot be modified. This is because a clone is created and

* passed into the method instead of the original copy (this is called "pass by value").

*/

package javaexercises.methods;

public class ReverseArrayTest {

public static void main(String[] args) {

ReverseArrayTest aReverseArrayTest = new ReverseArrayTest();

int[] intArray = {12, 56, 34, 79, 26, 100};

aReverseArrayTest.printArray(intArray);

aReverseArrayTest.reverseArray(intArray);

aReverseArrayTest.printArray(intArray);

}

private void reverseArray(int[] intArray) {

if (intArray.length == 0) {

return;

}

for(int i = 0; i < intArray.length / 2; i++) {

int tmp = intArray[i];

intArray[i] = intArray[intArray.length - i -1];

intArray[intArray.length - i - 1] = tmp;

}

}

private void printArray(int[] intArray) {

for(int i = 0; i < intArray.length; i++) {

System.out.printf("%d ", intArray[i]);

}

System.out.println();

}

}