sagarpatel288

/**
 * 6/16/2020
 * Accessing java static like members defined inside of an object declaration and a companion object.
 * @author srdpatel
 * @since 1.0
 */
fun main() {

    //region Accessing top-level members

sagarpatel288

/**
 * 6/18/2020
 * <p>
 * `val` is like `final` of Java.
 * We use `val` when the value of a final (read only) property is initialized at runtime.
 * That means, we can assign the value from a function or a constructor.
 * We can also use `val` when the value of a final property is known at compile time but for that case,
 * we should prefer to use `const val` (kind of `static final` in Java) instead of only `val` to avoid
 * runtime overhead of accessing the variable.

sagarpatel288

/**
 * 6/16/2020
 * Java equivalent class of kotlin companion object {@link StaticInCompanionObjectClass}
 *
 * @author srdpatel
 * @since 1.0
 */
public final class StaticInCompanionObjectClassJava {

sagarpatel288

/**
 * 6/16/2020
 * Unlike kotlin, we have to write {@code public} keyword in Java.
 * In kotlin, classes are {@code public} by default. We don't have to write.
 * Unlike kotlin, we have to write {@code final} keyword in Java to save the class from inheritance.
 * In kotlin, classes are {@code final} by default. They cant be inherited unless we mark it as {@code open}.
 *
 * @author srdpatel
 * @see <a href="https://kotlinlang.org/docs/reference/classes.html">Classes and Inheritance</a>

sagarpatel288

/**
 * 6/16/2020
 * Accessing java static like members defined inside of a companion object.
 * @author srdpatel
 * @since 1.0
 */
fun main() {

    //region Accessing members of a companion object
    println(StaticInCompanionObjectClass.staticExample + " " + StaticInCompanionObjectClass.jvmStaticExample)

sagarpatel288

/**
 * 6/16/2020
 * `companion object` works like a `static` access of java.
 * It is an `object declaration` inside a class.
 * Note that the `const` keyword is applicable to primitive data types and String only.
 * And We use `@JvmField` annotation for other (non-primitive) data types.
 * @author srdpatel
 * @since 1.0
 */
class StaticInCompanionObjectClass {

sagarpatel288

/**
 * 6/16/2020
 * Unlike kotlin, we have to write {@code public} keyword in Java.
 * In kotlin, classes are {@code public} by default. We don't have to write.
 * Unlike kotlin, we have to write {@code final} keyword in Java to save the class from inheritance.
 * In kotlin, classes are {@code final} by default. They cant be inherited unless we mark it as {@code open}.
 *
 * @author srdpatel
 * @see <a href="https://kotlinlang.org/docs/reference/classes.html">Classes and Inheritance</a>

sagarpatel288

/**
 * 6/16/2020
 * Java equivalent class of {@link StaticInObjectDeclaration}
 *
 * @author srdpatel
 * since 1.0
 */
public final class StaticInObjectDeclarationJava {

    /**

sagarpatel288

/**
 * 6/16/2020
 * Accessing java static like members defined inside of an object declaration
 * @author srdpatel
 * @since 1.0
 */
fun main() {

    //region Accessing members of an object declaration
    println(StaticInObjectDeclaration.staticExample + " " + StaticInObjectDeclaration.jvmStaticExample)

sagarpatel288

/**
 * 6/15/2020
 * An example of java `static` like variable in kotlin
 * @author srdpatel
 * @since 1.0
 */
object StaticInObjectDeclaration {

    /**
     * 6/15/2020