get(int index):返回List中指定索引位置的元素。 indexOf(Object o, int fromIndex):返回指定元素在List中从指定索引位置开始首次出现的索引,如果List不包含该元素,则返回-1。 lastIndexOf(Object o, int fromIndex):返回指定元素在List中从指定索引位置开始最后一次出现的索引,如果List不包含该元素,则返回-1。 下...
import java.util.ArrayList; import java.util.List; public class ListMethod { public static void main(String[] args) { List list = new ArrayList(); list.add("张三丰"); list.add("孙悟空"); //list的常用方法 //void add(int index, Object obj) 在index位置插入obj,在没有加上索引,则会插...
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 the element to return Returns Object the element at...
Take advantage of the high-performance JDK with advanced optimizations that improve Java application performance and microservices deployment—on-premises and in the cloud. Together, the two technologies add value for cloud native deployments with native image and multilanguage support. ...
GraalVM Adds Value to the Java SE Subscription Learn more about the entitlement of GraalVM Enterprise at no additional cost with the purchase of Java SE Subscription. Java Voted as the Favorite Programming Language Learn more about the recent DZone Audience Awards where Java was voted as the favo...
String lastElement = linkedList.getLast(); 1. 使用get(index)方法获取LinkedList中指定索引位置的元素: 复制 String element = linkedList.get(index); 1. 修改元素: 使用set(index, element)方法可以修改LinkedList中指定索引位置的元素: 复制 linkedList.set(index, "newValue"); ...
();String lastElement=linkedList.getLast();String element=linkedList.get(0);System.out.println("First Element: "+firstElement);System.out.println("Last Element: "+lastElement);System.out.println("Element at index 0: "+element);// 修改元素linkedList.set(0,"NewValue");// 删除元素linkedList...
计算获取hash值Eget(int index);//通过索引获取元素Eset(int index,Eelement);//修改元素voidadd(int index,Eelement);//在指定位置插入元素Eremove(int index);//根据索引移除某个元素intindexOf(Object o);//根据对象获取索引intlastIndexOf(Object o);//获取对象元素的最后一个元素ListIterator<E>list...
String editedTitle = titleEditText.getText().toString().trim();if(typeList.indexOf((editedTitle))!= -1&& !editedTitle.equals(oldHabitType)){ Toast.makeText(this,"This habit type already exist.", Toast.LENGTH_SHORT).show();returnfalse; ...
Key-4:Value-3 Key-1:Value-10 Key-3:Value-12 Key-5:Value-6 InputIndex(assuming indexfrom1-N): Index-2 Output:3(Value3isatIndex2) 算法: 1.Checkwhether the indexinLinkedHashMapdoes existornot. ByusingsizeofLinkedHashMap. 2.Ifexists aprint,thevaluepresent there. elseprint" index does ...