Java Lombok | Null Checks for Method Arguments - @NonNull

package com.devkuma.tutorial.lombok;

import lombok.NonNull;

public class NonNullTutorial {

    public static void main(String[] args) {
        method("devkuma");
        method(null);
    }

    private static void method(@NonNull String value) {
        System.out.println(value);
    }
}

devkuma

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2 actionable tasks: 2 executed
Exception in thread "main" java.lang.NullPointerException: value is marked non-null but is null
    at com.devkuma.tutorial.lombok.NonNullTutorial.method(NonNullTutorial.java:11)
    at com.devkuma.tutorial.lombok.NonNullTutorial.main(NonNullTutorial.java:8)

package com.devkuma.tutorial.lombok;

import lombok.NonNull;

public class NonNullTutorial {
    public NonNullTutorial() {
    }

    public static void main(String[] args) {
        method("devkuma");
        method((String)null);
    }

    private static void method(@NonNull String value) {
        if (value == null) {
            throw new NullPointerException("value is marked non-null but is null");
        } else {
            System.out.println(value);
        }
    }
}