test/MemUsage/MemUsage.java

public class MemUsage {
  public static final int ROUNDS = 8;
  public static final int SIZE = 2000;

  public static void main(String [] args) {
    String s;
    for (int j = 0; j < ROUNDS; j++) {
      s = "";
      for (int i = 0; i < SIZE; i++) {
        s += "x";
      }
    }
  }
}