How to Replace a Element in Java ArrayList?
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 which 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.
public Object set(int index, Object element)
Return Value: The element which is at the specified index
Exception Throws: IndexOutOfBoundsException
This occurs when the index is out of range.
index < 0 or index >= size()
Here we will be proposing out 2 examples wherein one of them we will be setting the index within bound and in the other, we will be setting the index out of bounds.
Example 1: Where Index is Within Bound
[A, B, C, D] [A, B, E, D]
Example 2: Where Index is Out of Bound
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