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:
Flowchart:

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
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