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Java Exercises: Test that a given array of integers of length 2 contains a 4 or a 7

Java Basic: Exercise-78 with Solution

Write a Java program to test that a given array of integers of length 2 contains a 4 or a 7.

Sample Solution:

Java Code:

import java.util.Arrays; 
 public class Exercise78 {
 public static void main(String[] args)
 {
    int[] array_nums = {5, 7};
	System.out.println("Original Array: "+Arrays.toString(array_nums)); 
	if(array_nums[0] == 4 || array_nums[0] == 7)
		System.out.println("True");
	else
    System.out.println(array_nums[1] == 4 || array_nums[1] == 7);
	 
 }
}

Sample Output: 

Original Array: [5, 7]                                                 
true

Pictorial Presentation:

Java exercises: Test that a given array of integers of length 2 contains a 4 or a 7
Java exercises: Test that a given array of integers of length 2 contains a 4 or a 7

Flowchart:

Flowchart: Java exercises: Test that a given array of integers of length 2 contains a 4 or a 7

Java Code Editor:

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Previous: Write a Java program to create a new array of length 2 from two arrays of integers with three elements and the new array will contain the first and last elements from the two arrays.
Next: Write a Java program to rotate an array (length 3) of integers in left direction.

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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