iterable class java

To implement a class that can be used with a foreach loop, you must implement Iterable, which overrides a Iterator method, which returns a iteratorThe code is as follows:public class Itertest implements IterableStores the contents of the array private object[] Obj=new object[1];//record the number of elements added to the private int size;Records the current el

Iterable and Iterator of java. util, java. utiliterable package java.lang; import java.util.Iterator;public interface Iterable Iterator} Iterable is located in the java. lang Package, which holds an Iterator reference package j

. The addition and deletion of modcount in the arraylist changes the value, and expectedModcount is the value maintained in the traversal. If the two are not equal, a write operation occurs during the traversal. This causes data inconsistency.For details, refer to the blog [ConcurrentModificationException] [1]. The benefits of using iterator can be summarized as follows:** Encapsulate the internal implementation details of the container. For different sets, the same Traversal method can be pro

The Java Collection class library separates the interfaces and implementations of the set. The same interface can be implemented differently. The basic interface of the Java Collection class is the collection interface. The collection interface must implement the iterator interface. To indicate the interfaces of the Co

Definition of iterable:Java.lang Bag/** * Implementing this interface allows a object to be the target of * the "foreach" statement. * * @param /** * Returns An iterator over a set of elements of type T. * * @return an Iterator. * /iteratorDefinition of iterator:Java.util Package:Public interface IteratorIterator is an iterator class, and iterable is designed to iterate using foreach as l

1. iterator is an iterator class, and iterable is designed to iterate by using foreach as long as the interface is implemented. 2. the iterator interface is encapsulated in iterable, and iterator iterators can be used as long as the class of the Iterable interface is implem

package generic;import java.util.ArrayList;import java.util.Arrays;import java.util.Collection;import java.util.Iterator;public class ReversibleArrayList Anonymous internal class, iterable

Total: Java provides a relatively complete set of container classes, the basic types are: List, set, Queue, Map, these object types are called collection classes.one, interface inheritance relationship:Iterable interface, in Java.lang package, Collection, List, Queue, set interface inherit Iterable interfaceAs can be seen, list, Queue, set these three interfaces are in the Java.util package, inherit from th

Java.lang.IterableJava.util.IteratorIterator is an iterator class, and iterable is an interface.Many classes implement the Iterable interface so that the object can call the iterator () method.are generally used in combination, such asThe HashMap class implements the Iterable