How do I get the last index of an ArrayList?

Approach:

1. Get the ArrayList with elements.
2. Get the first element of ArrayList with use of get(index) method by passing index = 0.
3. Get the last element of ArrayList with use of get(index) method by passing index = size – 1.

What is peek () in stack?

Stack. peek() method in Java is used to retrieve or fetch the first element of the Stack or the element present at the top of the Stack. The element retrieved does not get deleted or removed from the Stack. Syntax: STACK.peek() Parameters: The method does not take any parameters.

What is the index of the last element in an array Java?

The lastIndexOf() method of ArrayList in Java is used to get the index of the last occurrence of an element in an ArrayList object. Parameter : The element whose last index is to be returned. Returns : It returns the last occurrence of the element passed in the parameter.

How do I print a specific element in an ArrayList?

PRINTING ARRAYLIST

1. 1) Using for loop. //using for loop System.out.println(“Using For Loop\n “); for (int i = 0; i < arrlist.size();i++) { System.out.println(arrlist.get(i)); }
2. 2) Using for-each loop.
3. 3) Using iterator.
4. 4) Using list-iterator.

How do I get the last element in a list?

To get the last element of the list in Python, use the list[-1] syntax. The list[-n] syntax gets the nth-to-last element. So list[-1] gets the last element, list[-2] gets the second to last. The list[-1] is the most preferable, shortest, and Pythonic way to get the last element.

What is the difference between pop () and peek () in a stack?

Peek simply returns the value of what is on top of the stack. In contrast to this, pop will remove the value from the stack and then return it.

What is the difference between pop () and peek () function?

In general programming terms, “pop” means the method of returning an object from a stack, while at the same time removing it from the stack. The term “peek” is more generic and can be used on other data containers/ADTs than stacks. “Peek” always means “give me the next item but do not remove it from the container”.

How do you find last index value?

The lastIndexOf() method returns the last index (position) of a specified value. The lastIndexOf() method returns -1 if the value is not found. The lastIndexOf() starts at a specified index and searches from right to left. By defalt the search starts at the last element and ends at the first.

How do you find the last occurrence of an element in an array?

int index = findLastOccurrence(nums, n, target);

1. if (index != -1) {
2. printf(“The last occurrence of element %d is located at index %d”, target, index); }
3. else { printf(“Element not found in the array”); }
4. return 0; }