Java Array Exercises: Find the duplicate values of an array of integer values
Java Array: Exercise-12 with Solution
Write a Java program to find the duplicate values of an array of integer values.
Pictorial Presentation:

Sample Solution:
Java Code:
import java.util.Arrays;
public class Exercise12 {
public static void main(String[] args)
{
int[] my_array = {1, 2, 5, 5, 6, 6, 7, 2};
for (int i = 0; i < my_array.length-1; i++)
{
for (int j = i+1; j < my_array.length; j++)
{
if ((my_array[i] == my_array[j]) && (i != j))
{
System.out.println("Duplicate Element : "+my_array[j]);
}
}
}
}
}
Sample Output:
Duplicate Element : 2 Duplicate Element : 5 Duplicate Element : 6
Flowchart:

Visualize Java code execution (Python Tutor):
Java Code Editor:
Improve this sample solution and post your code through Disqus
Previous: Write a Java program to reverse an array of integer values.
Next: Write a Java program to find the duplicate values of an array of string values.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
Java: Tips of the Day
countOccurrences
Counts the occurrences of a value in an array.
Use Arrays.stream().filter().count() to count total number of values that equals the specified value.
public static long countOccurrences(int[] numbers, int value) { return Arrays.stream(numbers) .filter(number -> number == value) .count(); }
Ref: https://bit.ly/3kCAgLb
- Exercises: Weekly Top 12 Most Popular Topics
- Pandas DataFrame: Exercises, Practice, Solution
- Conversion Tools
- JavaScript: HTML Form Validation
- SQL Exercises, Practice, Solution - SUBQUERIES
- C Programming Exercises, Practice, Solution : For Loop
- Python Exercises, Practice, Solution
- Python Data Type: List - Exercises, Practice, Solution
- C++ Basic: Exercises, Practice, Solution
- SQL Exercises, Practice, Solution - exercises on Employee Database
- SQL Exercises, Practice, Solution - exercises on Movie Database
- SQL Exercises, Practice, Solution - exercises on Soccer Database
- C Programming Exercises, Practice, Solution : Recursion