w3resource

Java Exercises: Check if an array of integers contains a specified number next to each other or there are two same specified numbers separated by one element

Java Basic: Exercise-97 with Solution

Write a Java program to check if an array of integers contains a specified number next to each other or there are two same specified numbers separated by one element.

Pictorial Presentation:

Java Basic Exercises: Check if an array of integers contains a specified number next to each other or there are two same specified numbers separated by one element

Sample Solution:

Java Code:

import java.util.*; 
import java.io.*; 
 public class Exercise97 {
 public static void main(String[] args)
 {
	  int[] array_nums = {10, 20, 10, 50, 20, 13, 50};
	//int[] array_nums = {10, 10, 50, 50, 20, 13, 50};
      boolean testd = false;
	  int result=0;
	  int x = 10;
	      
	for(int i = 0; i < array_nums.length - 1; i++) {
        if(array_nums[i] == x && array_nums[i+1] == x)
            {
         System.out.printf( String.valueOf(true));	
         result = 1 ;
		}
                  
        if(i <= array_nums.length - 3 && array_nums[i] == x && array_nums[i+2] == x)
           {
         System.out.printf( String.valueOf(true));	
         result = 1 ;
		}
    }
	
	 if (result==0)                             
	   {	 
         System.out.printf( String.valueOf(false));
	    }
		System.out.printf("\n");
    }
}

Sample Output: 

true

Flowchart:

Flowchart: Java exercises: Check if an array of integers contains a specified number next to each other or there are two same specified numbers separated by one element

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a Java program to check if there is a 10 in a given array of integers with a 20 somewhere later in the array.
Next: Write a Java program to check if the value 20 appears three times and no 20’s are next to each other in an given array of integers.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Share this Tutorial / Exercise on : Facebook and Twitter

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