Introduction to Kotlin (for Java Developers) - Cool Features - 15. (IntelliJ) Convert Java to Kotlin (and vice-versa).kt

// Conversion is not perfect, but can be helpful in the beginning

/*
public class MyJavaClass {
    private int num = 5;

    public void printNum() {
        System.out.println(num);

        switch (num) {
            case 5: System.out.println("It's five!"); break;
            case 6: System.out.println("It's six!"); break;
            default: break;
        }

        for (int i = 0; i < 10; ++i) {
            System.out.println(i);
        }
        for (int i = 10; i > 0; --i) {
            System.out.println(i);
        }
    }
}
*/

class MyJavaClass {
    private val num = 5
    fun printNum() {
        println(num)
        when (num) {
            5 -> println("It's five!")
            6 -> println("It's six!")
            else -> {}
        }
        for (i in 0..9) {
            println(i)
        }
        for (i in 10 downTo 1) {
            println(i)
        }
    }
}

// Kotlin to Java:
// - Tools > Kotlin > Show Kotlin Bytecode -> click on "Decompile"