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Java Exercises: Check if there is a 10 in a given array of integers with a 20 somewhere later in the array

Java Basic: Exercise-96 with Solution

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.

Pictorial Presentation:

Java Basic Exercises: Check if there is a 10 in a given array of integers with a 20 somewhere later in the array

Sample Solution:

Java Code:

import java.util.*; 
import java.io.*; 
 public class Exercise96 {
 public static void main(String[] args)
 {
	  int[] array_nums = {10, 70, 80, 50, 20, 13, 50};
      boolean testd = false;
	  int result=0;
	  int x = 10;
	  int y = 20;
    
    for(int i = 0; i < array_nums.length; i++) {
        if(array_nums[i] == x)
            testd = true;
                    
        if(testd && array_nums[i] == y)
		{
         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 there is a 10 in a given array of integers with a 20 somewhere later in the array

Java Code Editor:

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Previous: Write a Java program to create an array (length # 0) of string values. The elements will contain "0", "1", "2" … through ... n-1.
Next: 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.

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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