Contents

import java.util.stream.IntStream;

public final class Difference {

    public static int computeSquareOfSumTo(final int input) {
        final int sum = input * (input + 1) / 2;
        return (int) Math.pow(sum, 2);
    }

    public static int computeSumOfSquaresTo(final int input) {
        return IntStream.rangeClosed(1, input)
                .map(i -> (int) Math.pow(i, 2))
                .sum();
    }

    public static int betweenSquareOfSumAndSumOfSquaresTo(final int input) {
        return computeSquareOfSumTo(input) - computeSumOfSquaresTo(input);
    }

}

Version data entries

120 entries across 120 versions & 1 rubygems

Version	Path
trackler-2.0.8.33	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.32	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.31	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.30	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.29	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.28	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.27	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.26	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.24	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.23	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.22	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.21	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.20	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.19	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.18	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.17	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.16	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.15	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.14	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java
trackler-2.0.8.13	tracks/java/exercises/difference-of-squares/src/example/java/Difference.java