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Java Exercises: Compute a specified formula

Java Basic: Exercise-10 with Solution

Write a Java program to compute a specified formula.

Specified Expression :
4.0 * (1 - (1.0/3) + (1.0/5) - (1.0/7) + (1.0/9) - (1.0/11))

Pictorial Presentation:

Java: Compute a specified formula

Sample Solution:

Java Code:

public class Exercise10 {
    public static void main(String[] args) {
        double result = 4.0 * (1 - (1.0/3) + (1.0/5) - (1.0/7) + (1.0/9) - (1.0/11));
        System.out.println(result); //
    }
}

Sample Output:

2.9760461760461765

Flowchart:

Flowchart: Java exercises: Compute a specified formula

Java Code Editor:

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Java: Tips of the Day

getEnumMap

Converts to enum to Map where key is the name and value is Enum itself.

public static <E extends Enum<E>> Map<String, E> getEnumMap(final Class<E> enumClass) {
    return Arrays.stream(enumClass.getEnumConstants())
            .collect(Collectors.toMap(Enum::name, Function.identity()));
}

Ref: https://bit.ly/3xXcFZt