May 5, 2016 · You can use Java.util.ArrayList.indexOf(Object) method it will return the index position of first occurrence of the element in the list. Or java.util.ArrayList.Contains(Object o) The above method will return true if the specified element available in the list.

Dec 10, 2024 · In Java, the ArrayList contains () method is used to check if the specified element exists in an ArrayList or not. Example: Here, we will use the contains () method to check if the ArrayList of Strings contains a specific element.

Jul 8, 2013 · For Java 8 you can get the stream from the ArrayList and apply filter (e->e.codeIsIn.equals (...)) to it. In Java8 you can use streams: return …

I'm trying to figure out the best way to search a customer in an ArrayList by its Id number. The code below is not working; the compiler tells me that I am missing a return statement.

Searching for an element in an ArrayList in Java can be done using several methods, including contains(), indexOf(), lastIndexOf(), loops, and streams. Each method has its own use cases and advantages.

Apr 4, 2025 · In this article, we learned different ways of finding an element in a List, s tarting with quick existence checks and finishing with field-based searches. We also looked at the third-party libraries Google Guava and Apache Commons as alternatives to the Java 8 Streams API.

The ArrayList class is a resizable array, which can be found in the java.util package. The difference between a built-in array and an ArrayList in Java, is that the size of an array cannot be modified (if you want to add or remove elements to/from an array, you have to create a new one).

An element in an ArrayList can be searched using the method java.util.ArrayList.indexOf (). This method returns the index of the first occurance of the element that is specified.

In this tutorial, we have covered several methods for searching strings in an ArrayList, including linear search, using the contains method, and implementing a custom search function.

Mar 12, 2025 · Write a Java program to search for a specific string in an ArrayList using binary search after sorting the list. Write a Java program to implement a case-insensitive search for …