Web Reference: Sep 17, 2011 · I created an ArrayList of bulbs, and I'm trying to replace a bulb at specific index with another bulb. So with the following heading, how do I proceed? public void Jul 23, 2025 · To replace an element in Java ArrayList, set () method of java.util. An ArrayList class can be used. The set () method takes two parameters the indexes of the element that has to be replaced and the new element. The index of an ArrayList is zero-based. So, to replace the first element, 0 should be the index passed as a parameter. Example: Through this tutorial, we’ll take a look at how to replace an element at a specific index in a Java ArrayList.
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