ArrayList.IndexOf Method Reference Feedback Definition Namespace: System.Collections Assemblies: netstandard.dll, System.Runtime.dll Returns the zero-based index of the first occurrence of a value in the ArrayList or in a portion of it. Overloads Expand table IndexOf(Object) Searches ...
ArrayList.IndexOf Method發行項 2010/06/03 本文內容 Overload List Version Information See Also Returns the zero-based index number of the first occurrence of a specified object (if any) in either the entire ArrayList collection or a specified portion of it....
Find the position of an item in a list: import java.util.ArrayList; public class Main { public static void main(String[] args) { ArrayList<String> cars = new ArrayList<String>(); cars.add("Volvo"); cars.add("BMW"); cars.add("Ford"); cars.add("Mazda"); System.out.println(cars...
The method returns integer. 1. indexOf() – Get index of given object in ArrayList in Java In this example, we will define an ArrayList of Strings and initialize it with some elements in it. We will use ArrayList indexOf() method to find the first index of object"c"in this ArrayList....
Number ArrayList: [22, 13, 35] Index of 13: 1 Index of 50: -1 In the above example, we have created an arraylist namednumbers. Notice the expressions, // returns 1numbers.indexOf(13)// returns -1numbers.indexOf(50) Here, theindexOf()method successfully returns the position of elemen...
Learn how toget the index of first occurrence of an elementin theArrayListusingArrayList.indexOf()method. To get the index of the last occurrence of the same element, use thelastIndexOf()method. 1.ArrayList.indexOf()API TheindexOf()returns the index of the first occurrence of the specified...
The lastIndexOf() method is used to get the index of the last occurrence of an element in an ArrayList object.Package : java.utilJava Platform : Java SE 8 Syntax:lastIndexOf(Object o)Parameters:NameDescription o The element whose index is to be returned....
Learn to get the index of last occurrence of an element in the arraylist in Java using Arraylist.lastIndexOf() method with a simple example. Learn how to get the index of the last occurrence of an element inArrayListusing theArrayList.lastIndexOf()method. To get the index of the first ...
Note: If the specified element doesn't exist in the list, the lastIndexOf() method returns -1. Example: Get the Last Occurrence of ArrayList Element import java.util.ArrayList; class Main { public static void main(String[] args) { // create an ArrayList ArrayList<String> languages = new...
ArrayListlist : [10, 20, 30, 40, 50] index : 2 Java Copy例2 :// Java program to demonstrate // indexOf() method // for Integer value import java.util.*; public class GFG1 { public static void main(String[] argv) throws Exception { try { // Creating object of AbstractList<...