private static sun.misc.Unsafe getUnsafe() {
      try {
        return sun.misc.Unsafe.getUnsafe();
      } catch (SecurityException tryReflectionInstead) {
      }
      try {
        return java.security.AccessController.doPrivileged(
            new java.security.PrivilegedExceptionAction<sun.misc.Unsafe>() {
              @Override
              public sun.misc.Unsafe run() throws Exception {

    }
  }

  /**
   * Returns a sun.misc.Unsafe. Suitable for use in a 3rd party package. Replace with a simple call
   * to Unsafe.getUnsafe when integrating into a jdk.
   *
   * @return a sun.misc.Unsafe
   */
  @SuppressWarnings("removal") // b/318391980
  private static sun.misc.Unsafe getUnsafe() {
    try {
      return sun.misc.Unsafe.getUnsafe();

  /**
   * Returns the JavaLangAccess class that is present in all Sun JDKs. It is not allowed in
   * AppEngine, and not present in non-Sun JDKs.
   */
  @SuppressWarnings("removal") // b/318391980
  @J2ktIncompatible
  @GwtIncompatible // java.lang.reflect
  @CheckForNull
  private static Object getJLA() {
    try {
      /*
       * We load sun.misc.* classes using reflection since Android doesn't support these classes and

  /**
   * Returns the JavaLangAccess class that is present in all Sun JDKs. It is not allowed in
   * AppEngine, and not present in non-Sun JDKs.
   */
  @SuppressWarnings("removal") // b/318391980
  @J2ktIncompatible
  @GwtIncompatible // java.lang.reflect
  @CheckForNull
  private static Object getJLA() {
    try {
      /*
       * We load sun.misc.* classes using reflection since Android doesn't support these classes and

    }
  }

  /**
   * Returns a sun.misc.Unsafe. Suitable for use in a 3rd party package. Replace with a simple call
   * to Unsafe.getUnsafe when integrating into a jdk.
   *
   * @return a sun.misc.Unsafe
   */
  @SuppressWarnings("removal") // b/318391980
  private static sun.misc.Unsafe getUnsafe() {
    try {
      return sun.misc.Unsafe.getUnsafe();

              new java.security.PrivilegedExceptionAction<sun.misc.Unsafe>() {
                @Override
                public sun.misc.Unsafe run() throws Exception {
                  Class<sun.misc.Unsafe> k = sun.misc.Unsafe.class;
                  for (java.lang.reflect.Field f : k.getDeclaredFields()) {
                    f.setAccessible(true);
                    Object x = f.get(null);

import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;
import sun.security.jca.ProviderList;
import sun.security.jca.Providers;

/**
 * Tests for the MacHashFunction.
 *
 * @author Kurt Alfred Kluever
 */
public class MacHashFunctionTest extends TestCase {

import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;
import sun.security.jca.ProviderList;
import sun.security.jca.Providers;

/**
 * Tests for the MacHashFunction.
 *
 * @author Kurt Alfred Kluever
 */
public class MacHashFunctionTest extends TestCase {

   * to remove() will incorrectly throw an IllegalStateException, instead of removing the last
   * element returned.
   *
   * <p>See <a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6529795">Sun bug 6529795</a>
   */
  static class IteratorWithSunJavaBug6529795<T> implements Iterator<T> {
    Iterator<T> iterator;
    boolean nextThrewException;

      } catch (NullPointerException tolerated) {
      }
    } else {
      try {
        entrySet.retainAll(null);
        // We have to tolerate a successful return (Sun bug 4802647)
      } catch (UnsupportedOperationException | NullPointerException e) {
        // Expected.
      }
    }
    assertInvariants(map);
  }

  public void testEntrySetClear() {