package java.util;
import checkers.nullness.quals.*;
@checkers.quals.DefaultQualifier("checkers.nullness.quals.NonNull")
// This collection can only contain nonnull values
public class Hashtable<K extends @NonNull Object, V extends @NonNull Object> extends Dictionary<K, V> implements Map<K, V>, Cloneable, java.io.Serializable {
private static final long serialVersionUID = 0;
public Hashtable(int a1, float a2) { throw new RuntimeException("skeleton method"); }
public Hashtable(int a1) { throw new RuntimeException("skeleton method"); }
public Hashtable() { throw new RuntimeException("skeleton method"); }
public Hashtable(Map<? extends K, ? extends V> a1) { throw new RuntimeException("skeleton method"); }
public synchronized int size() { throw new RuntimeException("skeleton method"); }
public synchronized boolean isEmpty() { throw new RuntimeException("skeleton method"); }
public synchronized Enumeration<K> keys() { throw new RuntimeException("skeleton method"); }
public synchronized Enumeration<V> elements() { throw new RuntimeException("skeleton method"); }
public synchronized boolean contains(Object a1) { throw new RuntimeException("skeleton method"); }
public boolean containsValue(@Nullable Object a1) { throw new RuntimeException("skeleton method"); }
public synchronized @Pure boolean containsKey(@Nullable Object a1) { throw new RuntimeException("skeleton method"); }
public synchronized @Pure @Nullable V get(Object a1) { throw new RuntimeException("skeleton method"); }
public synchronized @Nullable V put(K a1, V a2) { throw new RuntimeException("skeleton method"); }
public synchronized @Nullable V remove(Object a1) { throw new RuntimeException("skeleton method"); }
public synchronized void putAll(Map<? extends K, ? extends V> a1) { throw new RuntimeException("skeleton method"); }
public synchronized void clear() { throw new RuntimeException("skeleton method"); }
public synchronized String toString() { throw new RuntimeException("skeleton method"); }
public Set<K> keySet() { throw new RuntimeException("skeleton method"); }
public Set<Map.Entry<K, V>> entrySet() { throw new RuntimeException("skeleton method"); }
public Collection<V> values() { throw new RuntimeException("skeleton method"); }
public synchronized boolean equals(@Nullable Object a1) { throw new RuntimeException("skeleton method"); }
public synchronized int hashCode() { throw new RuntimeException("skeleton method"); }
public synchronized Object clone() { throw new RuntimeException("skeleton method"); }
}