There are 9 types of java.lang.OutOfMemoryError in Java.

1. java.lang.OutOfMemoryError: Java heap space
2. java.lang.OutOfMemoryError: GC Overhead limit exceeded
3. java.lang.OutOfMemoryError: Requested array size exceeds VM limit
4. java.lang.OutOfMemoryError: Permgen space
5. java.lang.OutOfMemoryError: Metaspace
6. java.lang.OutOfMemoryError: Unable to create new native thread
7. java.lang.OutOfMemoryError: request <bytes> for <reason>. Out of swap space?
8. java.lang.OutOfMemoryError: Kill process or sacrifice child
9. java.lang.OutOfMemoryError: Direct buffer memory