/*
* Data classes in Java
* Defined here are two classes one "data" and the other normal
* They are otherwise identical.
* The data class gets a useful toString method and an
* equals method that compares the public fields of the class
* as opposed to simple popinter equality of the standard class.
*
* @author ggtowell
* created Aug 2, 2021
 */

// A data class holding x and y values
data class XY(val x:Int, val y:Int)

// A normal class holding x and y values
class CXY(x:Int, y:Int) 

fun main() {
    // create a bumch of instances
    val xy45 = XY(4,5)
    val xy55 = XY(5,5)
    val cxy45 = CXY(4,5)
    val xy45a = XY(4,5)
    val cxy45a = CXY(4,5)

    // print all of the instances
    println(String.format(" XY45  %s", xy45))
    println(String.format(" XY55  %s", xy55))
    println(String.format("CXY45  %s", cxy45))
    println(String.format(" XY45a %s", xy45a))
    println(String.format("CXY45a %s", cxy45a))

    println("xy45==xy55 %s".format(xy45.equals(xy55)))
    println("xy45==xy45a %s".format(xy45.equals(xy45a)))
    println("cxy45==xy45 %s".format(cxy45.equals(xy45)))
    println("cxy45==cxy45a %s".format(cxy45.equals(cxy45a)))
    

}