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Stack lastIndexOf(Object, int) method in Java with Example

Last Updated : 24 Dec, 2018
The Java.util.Stack.lastIndexOf(Object element, int last_index) method is used to the last index of the first occurrence of the specified element in this Stack, searching forwards from last index, or returns -1 if the element is not found. More formally, returns the lowest last index i such that (i >= last index && Objects.equals(o, get(i))), or -1 if there is no such last index. Syntax: 
public int lastIndexOf(Object element, 
 int last_index)
Parameters: This method accepts two parameters:
  • element of the type of Stack. It specifies the element whose occurrence is needed to be checked in the Stack.
  • last index of the type Integer. It specifies the last index to start searching from
Return Value: This method returns the last index or position of the first occurrence of the element in the Stack from the specified last index. Else it returns -1 if the element is not present in the Stack. The returned value is of integer type. Exception: This method throws IndexOutOfBoundsException if the specified index is greater than or equal to the current size of this vector Below programs illustrate the Java.util.Stack.lastIndexOf() method: Program 1:
Output: 
Stack: [Geeks, for, Geeks, 10, Geeks]
The first occurrence of Geeks is at last index:0
The last occurrence of Geeks is at last index: 4
Program 2: To demonstrate IndexOutOfBoundsException
Output: 
Stack: [1, 2, 3, 10, 20]
The 10th occurrence of Geeks is at index: 
java.lang.IndexOutOfBoundsException: 10 >= 5
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