Web Reference: Mar 17, 2026 · Elements can be accessed using their indices, similar to arrays. Duplicates are allowed. Elements are stored in the order they are inserted. ArrayList is not thread-safe. To make it thread-safe, you must wrap it manually using Collections.synchronizedList (). From Java 10, you can use the var keyword to declare an ArrayList variable without writing the type twice. The compiler figures out the type from the value you assign. Dec 12, 2014 · New to Java, wanted to know how to access an ArrayList element, Googled it, first result was this question. Got what I needed in a few seconds.
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