Java 类com.intellij.util.containers.WeakValueHashMap 实例源码

private WeakValueHashMap<Key, Object> getOrCreateMap() {
  WeakValueHashMap<Key, Object> userData = myUserData;
  if (userData == null) {
    myUserData = userData = new WeakValueHashMap<Key, Object>();
  }
  return userData;
}

private WeakValueHashMap<Key, Object> getOrCreateMap() {
  WeakValueHashMap<Key, Object> userData = myUserData;
  if (userData == null) {
    myUserData = userData = new WeakValueHashMap<Key, Object>();
  }
  return userData;
}

@Nonnull
private Map<Key, Object> getOrCreateMap() {
  Map<Key, Object> userData = myUserData;
  if (userData == null) {
    myUserData = userData = new WeakValueHashMap<>();
  }
  return userData;
}

@Nonnull
private Map<Key, Object> getOrCreateMap() {
  Map<Key, Object> userData = myUserData;
  if (userData == null) {
    myUserData = userData = new WeakValueHashMap<>();
  }
  return userData;
}