Java Exercises: Test whether there are two integers x and y
Java Basic: Exercise-191 with Solution
Write a Java program to test whether there are two integers x and y such that x^2 + y^2 is equal to a given positive number.
Pictorial Presentation:

Sample Solution:
Java Code:
import java.util.*;
public class Solution {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.print("Input a positive integer: ");
int n = in.nextInt();
if (n>0)
{
System.out.print("Is "+n+" sum of two square numbers? "+sum_of_square_numbers(n));
}
}
public static boolean sum_of_square_numbers(int n) {
int left_num = 0, right_num = (int) Math.sqrt(n);
while (left_num <= right_num) {
if (left_num * left_num + right_num * right_num == n) {
return true;
} else if (left_num * left_num + right_num * right_num < n) {
left_num++;
} else {
right_num--;
}
}
return false;
}
}
Sample Output:
Input a positive integer: 25 Is 25 sum of two square numbers? true
Flowchart:

Java Code Editor:
Company: LinkedIn
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Java: Tips of the Day
Java: Anagrams
Generates all anagrams of a string.
public static List<String> anagrams(String input) { if (input.length() <= 2) { return input.length() == 2 ? Arrays.asList(input, input.substring(1) + input.substring(0, 1)) : Collections.singletonList(input); } return IntStream.range(0, input.length()) .mapToObj(i -> new SimpleEntry<>(i, input.substring(i, i + 1))) .flatMap(entry -> anagrams(input.substring(0, entry.getKey()) + input.substring(entry.getKey() + 1)) .stream() .map(s -> entry.getValue() + s)) .collect(Collectors.toList()); }
Ref: https://bit.ly/3rvAdAK
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