GCTest.java

public class GCTest {

  public void handle1() {
    byte[] bytes = getBytes();
    handleBytes(bytes);
  }

  public void handle2() {
    int[] ints = getInts(getBytes());
    handleInts(ints);
  }

  private byte[] getBytes() {
    return new byte[256 * 1024 * 1024];
  }

  private int[] getInts(byte[] bytes) {
    int[] ints = new int[bytes.length / 4];
    for (int i = 0; i < ints.length; i+=4) {
      ints[i] = (bytes[4*i]<<24) + (bytes[4*i+1]<<16) +
          (bytes[4*i+2]<<8) + bytes[4*i+3];
    }
    return ints;
  }

  private void handleBytes(byte[] bytes) {
    handleInts(getInts(bytes));
  }

  private void handleInts(int[] ints) {
    List<byte[]> allocated = new ArrayList<byte[]>();
    while (true) {
      try {
        allocated.add(new byte[1024 * 1024]);
      } catch(Throwable e) {
        System.out.println(allocated.size() + " " + ints.length);
        System.exit(0);
      }
    }
  }
}