Java: Test if an array contains a specific value

Last update on May 09 2025 12:51:52 (UTC/GMT +8 hours)

5. Check if array contains a specific value

Write a Java program to test if an array contains a specific value.

Pictorial Presentation:

Sample Solution:

Java Code:

// Define a class named Exercise5.
public class Exercise5 {
   // Define a method 'contains' that checks if an integer array 'arr' contains a given 'item'.
   public static boolean contains(int[] arr, int item) {
      // Iterate through each element 'n' in the array 'arr'.
      for (int n : arr) {
         // Check if 'item' is equal to the current element 'n'.
         if (item == n) {
            // If a match is found, return 'true'.
            return true;
         }
      }
      // If no match is found, return 'false'.
      return false;
   }
   
   // The main method where the program execution starts.
   public static void main(String[] args) {
      // Declare an integer array 'my_array1' and initialize it with values.
      int[] my_array1 = {
         1789, 2035, 1899, 1456, 2013, 
         1458, 2458, 1254, 1472, 2365, 
         1456, 2265, 1457, 2456
      };
      
      // Check if the integer array 'my_array1' contains the item 2013 and print the result.
      System.out.println(contains(my_array1, 2013));
      
      // Check if the integer array 'my_array1' contains the item 2015 and print the result.
      System.out.println(contains(my_array1, 2015));
   }
}

Sample Output:

true                                                                                                       
false 

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to check if an array contains all elements of another array.
• Write a Java program to check if an array contains only unique values.
• Write a Java program to check if an array contains at least one negative number.
• Write a Java program to check if a given array contains consecutive numbers.

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