Java 11 Cookbook

How to do it...

1. To see how GC works, write the following program:

        public class Chapter11Memory {              public static void main(String... args) {              int max = 99_888_999;              System.out.println("Chapter11Memory.main() for "                                       + max + " is running...");              List<AnObject> list = new ArrayList<>();              IntStream.range(0, max)                       .forEach(i -> list.add(new AnObject(i)));           }           private static class AnObject {              private int prop;              AnObject(int i){ this.prop = i; }           }        }

As you can see, it creates 99,888,999 objects and adds them to the List<AnObject> list collection. You might tune it by decreasing the maximum number of objects (max) to match the configuration of your computer.

2. The G1 GC is the default collector since Java 9, so you don't have to set anything if it is ...