Mastering High Performance with Kotlin

@JvmField annotation

If you want to declare just a field with the public modifier and without a getter and setter, you can use the @JvmField annotation. In this case, we should follow the concept of object-oriented programming and encapsulate data and operations. But sometimes, we need a simple class such as Point, which can be used as follows:

val point = Point(3, 4)point.x = 10

A naive approach in Kotlin is to create a class like this:

class Point(var x: Int, var y: Int)

If you decompile this class to Java, you'll see something like this:

public final class Point {   private int x;   private int y;   public final int getX() {      return this.x;   }   public final void setX(int var1) {      this.x = var1;   }   public final int getY() {      return this.y;   }   public ...