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Java Array Exercises: Reverse an array of integer values

Java Array: Exercise-11 with Solution

Write a Java program to reverse an array of integer values.

Pictorial Presentation:

Java Array Exercises: Reverse an array of integer values

Sample Solution:

Java Code:

import java.util.Arrays; 
public class Exercise11 {
public static void main(String[] args){   
    int[] my_array1 = {
            1789, 2035, 1899, 1456, 2013, 
            1458, 2458, 1254, 1472, 2365, 
            1456, 2165, 1457, 2456};
  System.out.println("Original array : "+Arrays.toString(my_array1));  
   for(int i = 0; i < my_array1.length / 2; i++)
  {
    int temp = my_array1[i];
    my_array1[i] = my_array1[my_array1.length - i - 1];
    my_array1[my_array1.length - i - 1] = temp;
  }
    System.out.println("Reverse array : "+Arrays.toString(my_array1));
 }
}

Sample Output:

Original array : [1789, 2035, 1899, 1456, 2013, 1458, 2458, 1254, 1472, 2365, 1456, 2165, 1457, 2456]         
Reverse array : [2456, 1457, 2165, 1456, 2365, 1472, 1254, 2458, 1458, 2013, 1456, 1899, 2035, 1789]

Flowchart:

Flowchart: Java exercises: Reverse an array of integer values

Visualize Java code execution (Python Tutor):


Java Code Editor:

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Java: Tips of the Day

How to sort an ArrayList?

Collections.sort(testList);
Collections.reverse(testList);

That will do what you want. Remember to import Collections though!

Ref: https://bit.ly/32urdSe