System.out.println("第一个元素: "+list.get(0)); System.out.println("第二个元素: "+list.get(1)); System.out.println("第三个元素: "+list.get(2)); System.out.println("第四个元素: "+list.get(3)); System.out.println("第五个元素: "+list.get(4)); System.out.println("第六个...
//public E set(int index,E element):修改指定索引处的元素,返回被修改的元素 // System.out.println(array.set(1,"javaee")); //IndexOutOfBoundsException // System.out.println(array.set(3,"javaee")); //public E get(int index):返回指定索引处的元素 // System.out.println(array.get(0))...
LinkedList详解可以看我的另一篇文章:Java集合:LinkedList详解 ArrayList底层基于动态数组实现,LinkedList底层基于链表实现 对于随机访问(get/set方法),ArrayList通过index直接定位到数组对应位置的节点,而LinkedList需要从头结点或尾节点开始遍历,直到寻找到目标节点,因此在效率上ArrayList优于LinkedList 对于插入和删除(add/remov...
我们用方法来改进程序// 空arrayaddStudent(array);addStudent(array);addStudent(array);//遍历集合,采用通用遍历格式实现// 遍历arrayfor(int i=0;i<array.size();i++){Student s=array.get(i);System.out.println(s.getName()+","+s.get
访问ArrayList 中的元素可以使用 get() 方法: 实例 importjava.util.ArrayList; publicclassRunoobTest{ publicstaticvoidmain(String[]args){ ArrayList<String>sites=newArrayList<String>(); sites.add("Google"); sites.add("Runoob"); sites.add("Taobao"); ...
System.out.println(array.set(1,"javaee")); // 发生索引越界异常 IndexOutOfBoundsException System.out.println(array.set(3,"javaee")); // public E get(int index):返回指定索引处的元素 System.out.println(array.get(0)); System.out.println(array.get(1)); ...
(3,"javaee"));//public E get(int index):返回指定索引处的元素System.out.println(array.get(0));System.out.println(array.get(1));System.out.println(array.get(2));//public int size():返回集合中的元素的个数System.out.println(array.size());//输出集合System.out.println("array:" + ...
Namespace: Java.Util Assembly: Mono.Android.dll Returns the element at the specified position in this list. C# 复制 [Android.Runtime.Register("get", "(I)Ljava/lang/Object;", "GetGet_IHandler")] public override Java.Lang.Object? Get (int index); Parameters index Int32 index of ...
in the proper order.for(inti=0;i<size;i++){s.writeObject(elementData[i]);}if(modCount!=expectedModCount){thrownewConcurrentModificationException();}}/** * Reconstitute the ArrayList instance from a stream (that is, * deserialize it). */privatevoidreadObject(java.io.ObjectInputStreams)throws...
finalize,getClass,notify,notifyAll,wait,wait,wait Methods inherited from interface java.util.List containsAll,equals,hashCode Methods inherited from interface java.util.Collection parallelStream,stream trimToSize public void trimToSize() Trims the capacity of thisArrayListinstance to be the list's current ...