The indexOf() method returns the position of the first occurrence of a value in the list. If the item is not found in the list then it returns -1.Syntaxpublic int indexOf(Object item)Parameter ValuesParameterDescription item Required. The item to search for in the list....
Java LinkedListlastIndexOf()Method ❮ LinkedList Methods Example Find the first and last position of an item in a list: import java.util.LinkedList; public class Main { public static void main(String[] args) { LinkedList<String> cars = new LinkedList<String>(); cars.add("Volvo"); cars...
Java Copy输出。ArrayListlist : [10, 20, 30, 40, 50] Index of 25 : -1 Java Copy例3: 对于空值// Java program to demonstrate // indexOf() method // for null value import java.util.*; public class GFG1 { public static void main(String[] argv) throws Exception { try { // Creati...
JavaList.LastIndexOf(Object) MethodReference Feedback DefinitionNamespace: Android.Runtime Assembly: Mono.Android.dll C# Copy public virtual int LastIndexOf (object item); Parameters item Object Returns Int32 Remarks Portions of this page are modifications based on work created and shared by...
当使用indexOf()方法在字符串中查找空格时,如果该方法返回-1,表示未找到空格。indexOf()方法是JavaScript中用于查找字符串中指定字符或子字符串的方法之一。 概念: index...
Note: If the specified element doesn't exist in the list, theindexOf()method returns-1. Example 1: Get the Index of ArrayList Element importjava.util.ArrayList;classMain{publicstaticvoidmain(String[] args){// create an ArrayListArrayList<Integer> numbers =newArrayList<>();// insert element ...
4 * as bridge between array-based and collection-based APIs, in 5 * combination with {@link Collection#toArray}. The returned list is 6 * serializable and implements {@link RandomAccess}. 7 * 8 * This method also provides a convenient way to create a fixed-size 9 *...
importjava.util.LinkedList; publicclassLinkedListDemo { publicstaticvoidmain(String args[]) { // Creating an empty LinkedList LinkedList<String> list =newLinkedList<String>(); // Use add() method to add elements in the list list.add("Geeks"); ...
indexOf.00425720214844,但是当我单击地图上的某个地方时,我在控制台中得到这个错误消息:Uncaught TypeError: Object 63.00425720214844 has no method 'indexOf 浏览8提问于2012-04-13得票数 3 回答已采纳 2回答 使用递归的indexOf方法 我需要编写一个名为indexOf的递归方法,它接受两个String作为参数,并返回第一...
Java documentation forjava.util.AbstractList.indexOf(java.lang.Object). Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative Commons 2.5 Attribution License. ...