java.util Interface Iterator<E> Type Parameters: E- the type of elements returned by this iterator All Known Subinterfaces: ListIterator<E>,PrimitiveIterator<T,T_CONS>,PrimitiveIterator.OfDouble,PrimitiveIterato
//Iterator接口的JDK源码,注释为整理建议使用Iterator的正确姿势 public interface Iterator<E> { boolean hasNext(); //每次next之前,先调用此方法探测是否迭代到终点 E next(); //返回当前迭代元素 ,同时,迭代游标后移 /*删除最近一次已近迭代出出去的那个元素。 只有当next执行完后,才能调用remove函数。 比如你...
(1) 使用方法iterator()要求容器返回一个Iterator。第一次调用Iterator的next()方法时,它返回序列的第一个元素。注意:iterator()方法是java.lang.Iterable接口,被Collection继承。 (2) 使用next()获得序列中的下一个元素。 (3) 使用hasNext()检查序列中是否还有元素。 (4) 使用remove()将迭代器新返回的元素删除。
packagejava.util;importjava.util.function.Consumer;publicinterfaceIterator<E>{booleanhasNext();Enext();defaultvoidremove(){thrownewUnsupportedOperationException("remove");}defaultvoidforEachRemaining(Consumer<?superE>action){Objects.requireNonNull(action);while(hasNext())action.accept(next());}} 接下来,...
In the example below, we have implemented thehasNext(),next(),remove()andforEachRemining()methods of theIteratorinterface in anArrayList. importjava.util.ArrayList;importjava.util.Iterator;classMain{publicstaticvoidmain(String[] args){// Creating an ArrayListArrayList<Integer> numbers =newArrayList<...
classTrendingRepositoriesIteratorimplementsIterator{private$repos=[];private$pointer=0;publicfunction__construct(){$this->populate();}publicfunctionrewind(){$this->pointer=0;}publicfunctionvalid(){returnisset($this->repos[$this->pointer]);}publicfunctionnext(){$this->pointer++;}publicfunctionkey(){...
[Android.Runtime.Register("java/util/Iterator", "", "Java.Util.IIteratorInvoker")] [Java.Interop.JavaTypeParameters(new System.String[] { "E" })] public interface IIterator : Android.Runtime.IJavaObject, IDisposable, Java.Interop.IJavaPeerableDerived...
java.lang. Itreable ---| Itreable 接口 实现该接口可以使用增强for循环 ---| Collection 描述所有集合共性的接口 ---| List接口 可以有重复元素的集合 ---| Set接口 不可以有重复元素的集合 1. 2. 3. 4. 5. public interface Iterable<T>
Note that the remove() and set(Object) methods are not defined in terms of the cursor position; they are defined to operate on the last element returned by a call to next() or previous(). This interface is a member of the Java Collections Framework.Since...
public interface java.util.ListIteratorThe pure class interface