So don't be lazy, and use value types!

ValueOf.java

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonValue;

import java.util.Objects;

public abstract class ValueOf<T> {
    private final T value;

    @JsonCreator
    protected ValueOf(T value) {
        this.value = value;
        validate();
    }

    protected void validate() {
    }

    @JsonValue
    public final T get() {
        return value;
    }

    @Override
    public final boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null || getClass() != obj.getClass()) return false;
        return Objects.equals(value, ((ValueOf<?>) obj).value);
    }

    @Override
    public final int hashCode() {
        return Objects.hashCode(value);
    }

    @Override
    public final String toString() {
        return Objects.toString(value);
    }
}