Java JVM Memory Eater

This is a simple Java program that runs until all available JVM memory is used before ending with an exception.

package jvmmemoryeater;
import java.util.ArrayList;

public class JvmMemoryEater {

    static int divby = 1048576;
    
    public static void main(String[] args) {
        System.out.println(
                "Iteration, maxMemory MB, totalMemory MB, freeMemory MB"
                );
        int iInterval = 0;
        ArrayList<byte[]> a = new ArrayList<byte[]>();
        while (true) {
            if (iInterval == 1000) {
                report(a.size());
                iInterval = 0;
            }
            byte b[] = new byte[1024];
            a.add(b);
            iInterval++;
        }
        
    }
    
    private static void report(int i) {
        Runtime r = Runtime.getRuntime();
        long mm = r.maxMemory() / divby;
        long tm = r.totalMemory() / divby;
        long fm = r.freeMemory() / divby;
        System.out.println(
                "" + i + ", " + mm + ", " + tm + ", " + fm
                );
    }
}

When run at the command line it outputs

java -Xms100M -Xmx200M -jar jvmMemoryEater.jar
Iteration, maxMemory MB, totalMemory MB, freeMemory MB
1000, 177, 95, 94
2000, 177, 95, 93
3000, 177, 95, 92
4000, 177, 95, 91
5000, 177, 95, 90
6000, 177, 95, 89
before finally ending with the exception
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
      at jvmmemoryeater.JvmMemoryEater.main(JvmMemoryEater.java:23)
If the CSV output is viewed as a graph it appears as:
jvmgraph