Object[] elementData = ArrayList.this.elementData;if (i >=elementData.length)thrownewConcurrentModificationException(); cursor = i + 1;return (E) elementData[lastRet =i]; } 在next()方法中有一个checkForComodification()方法,其实现为: finalvoidcheckForComodification() {if (modCount !=expectedMod...
} }/**List方法打印结果如下:*///java1//Android1//IOS1privatestaticvoiditerSet() { Set<String>set=newHashSet<String>();set.add("java2");set.add("java2");set.add("IOS2");/**Set的迭代*/for(Iterator<String> iterator =set.iterator(); iterator.hasNext();) { String str=iterator.n...
importit.unimi.dsi.fastutil.objects.ObjectIterator;//导入依赖的package包/类publicsynchronizedbooleangenerateStructure(World worldIn, Random randomIn, ChunkPos chunkCoord){this.initializeStructureData(worldIn);inti = (chunkCoord.chunkXPos <<4) +8;intj = (chunkCoord.chunkZPos <<4) +8;booleanflag ...
[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...
An Iterator is an object that can be used to loop through collections, like ArrayList and HashSet. It is called an "iterator" because "iterating" is the technical term for looping.To use an Iterator, you must import it from the java.util package....
Object 要取代 或所傳回next最後一個專案的專案previous 屬性 RegisterAttribute 備註 將或#previous所#next傳回的最後一個專案取代為指定的專案(選擇性作業)。 只有在最後一次呼叫 或previous之後都未#remove呼叫 ,才能#add進行此呼叫next。 的java.util.ListIterator.set(E)Java 檔。
publicEnext(){checkForComodification();int i=cursor;//记录索引位置if(i>=size)//如果获取元素大于集合元素个数,则抛出异常thrownewNoSuchElementException();Object[]elementData=ArrayList.this.elementData;if(i>=elementData.length)thrownewConcurrentModificationException();cursor=i+1;//cursor + 1return(E)...
Skip navigation links Java SE 17 & JDK 17 Overview Module Package Class Use Tree Preview New Deprecated Index Help Summary: Nested | Field | Constr | Method Detail: Field | Constr | Method SEARCH: Module java.base Package java.util Interface Iterator<E> Type Parameters: E - the type of ...
An iterator over a collection.Iteratortakes the place ofEnumerationin the Java Collections Framework. Iterators differ from enumerations in two ways: Iterators allow the caller to remove elements from the underlying collection during the iteration with well-defined semantics. ...
/*** Tests whether the iterator has a next object.* @return true if there are further objects, false otherwise*/publicbooleanhasNext(){returnj<size;}// size is field of outer instance/*** Returns the next object in the iterator.** @return next object* @throws NoSuchElementException if ...