hackerrank-java/src/JavaLambdaExpression.java at master · anishLearnsToCode/hackerrank-java · GitHub

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// https://www.hackerrank.com/challenges/java-lambda-expressions/problem

public class JavaLambdaExpression {

private interface PerformOperation {

boolean check(int number);

}

private static class MyMath {

public static PerformOperation isOdd() {

return (int a) -> a % 2 != 0;

}

public static PerformOperation isPrime() {

return (int number) -> {

if(number == 1) return false;

for (int index = 2 ; index * index <= number ; index++) {

if (number % index == 0) {

return false;

}

return true;

};

}

public static PerformOperation isPalindrome() {

return (int a) -> {

String number = a + "";

String reverse = new StringBuilder(number).reverse().toString();

return number.equals(reverse);

};

}

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