The lastIndexOf() method of java.util.AbstractList class is used to return the index of the last occurrence of the specified element in this list, or -1 if this list does not contain the element. More formally, returns the highest index i such that (o==null ? get(i)==null : o.equals(get(i))), or -1 if there is no such index.
public int lastIndexOf(Object o)
Parameters: This method takes Object o as a parameter which is the element to search for.
Returns Value: This method returns the index of the last occurrence of the specified element in this list, or -1 if this list does not contain the element.
Exception: This method throws NullPointerException if the specified element is null and this list does not permit null elements.
Below are the examples to illustrate the lastIndexOf() method.
ArrayList : [A, B, A, B, E] Last index of A : 2
ArrayList : null Trying to get the index from null ArrayList Exception thrown : java.lang.NullPointerException
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