HashCode() is explicitly used in methods where hash functions are used, like hashTable() etc. One should always override hashCode() when overriding equals(). Unexpected behaviour will occur if you don't do so. HashCode() should have the same value whenever equals() returns true. Java中的集...
}//add method//it calls put() method on map object//and then compares it's return value with nullpublicbooleanadd(E e) {returnmap.put(e, PRESENT)==null; }//Other methods in Hash Set} 现在可以看到,每当我们创建一个HashSet时,它在内部创建一个HashMap,如果我们使用add()方法,它实际上调用...
HashCode() is explicitly used in methods where hash functions are used, like hashTable() etc. One should always override hashCode() when overriding equals(). Unexpected behaviour will occur if you don't do so. HashCode() should have the same value whenever equals() returns true. Java中的集...
Methods inherited from class java.lang.Object finalize,getClass,notify,notifyAll,wait,wait,wait Methods inherited from interface java.util.Set addAll,containsAll,equals,hashCode,removeAll,retainAll,toArray,toArray Methods inherited from interface java.util.Collection ...
The HashSet class has many useful methods. For example, to add items to it, use the add() method:Example // Import the HashSet class import java.util.HashSet; public class Main { public static void main(String[] args) { HashSet<String> cars = new HashSet<String>(); cars.add("...
* Implements Map.put and related methods. * * @param hash hash for key * @param key the key * @param value the value to put * @param onlyIfAbsent if true, don't change existing value * @param evict if false, the table is in creation mode. ...
Java HashSetclass implements theSetinterface, backed by a hash table(actually aHashMapinstance). If does not offer any guarantees as to the iteration order, and allowsnullelement. Table of Contents 1.HashSet Hierarchy2.HashSet Features3.HashSet Constructors4.HashSet Methods5.HashSet Example6....
Java Collections Java Set Java LinkedHashSetclassextends HashSetandimplements Setinterface. It is very very similar toHashSetclass, except if offers thepredictable iteration order. Table of Contents 1.LinkedHashSet Hierarchy2.LinkedHashSet Features3.LinkedHashSet Constructors4.LinkedHashSet Methods5.Li...
Methods inherited from class java.lang.Object finalize,getClass,notify,notifyAll,wait,wait,wait Methods inherited from interface java.util.Set add,addAll,clear,contains,containsAll,equals,hashCode,isEmpty,iterator,remove,removeAll,retainAll,size,toArray,toArray ...
Extension Methods 展开表 JavaCast<TResult>(IJavaObject) Performs an Android runtime-checked type conversion. JavaCast<TResult>(IJavaObject) GetJniTypeName(IJavaPeerable) Gets the JNI name of the type of the instance self. JavaAs<TResult>(IJavaPeerable) Try to coerce self to type ...