Mar 10, 2017 · I have an ArrayList pre-defined with hardcoded values. How do I add these to a stack? The idea is to demonstrate the pop, push, peek functions of the stack class. ArrayList<String> al = new

// Function to push an element onto the stack public void push(T value) { stackList.add(value); // Function to pop an element from the stack public T pop() { if (isEmpty()) { System.out.println("Stack is empty"); return null; return stackList.remove(stackList.size() - 1);

maybe you want to take a look java.util.Stack class. it has push, pop methods. and implemented List interface. for shift/unshift, you can reference @Jon's answer.

This example demonstrates how to iterate over an ArrayList and push each element into Stack. import java.util.List; import java.util.Stack; /** * Class demonstrates the usage of Stack class …

Push Operation: The push() method adds an item to the end of the ArrayList, effectively pushing it onto the stack. Pop Operation: The pop() method removes and returns the last item from the ArrayList, simulating the pop operation of a stack. If the stack is empty, it throws an IllegalStateException.

Jun 3, 2020 · Let’s implement this Stack data structure using ArrayList. We will implement the following APIs. push – To push the elements (Objects) into the Stack. pop – To pop the top Object from the Stack peek – To view the Top Object . This will not modify the Stack. size – Get the size of the Stack isEmpty – to check if the Stack is empty or ...

Dec 15, 2013 · public static void main(String[] args) { Stack brackets = new Stack(); Scanner k = new Scanner(System.in); System.out.println("* to Terminate or Enter bracket : "); String tempBrack = k.next(); while (!tempBrack.equals("*")) { System.out.println("* to Terminate or Enter bracket : "); switch (tempBrack) { case "(": brackets.push("(");

Use a for-each loop to iterate through the ArrayList and push each element onto the Stack. Alternatively, use the Java Stream API to convert the ArrayList to a Stack.

Apr 26, 2022 · In this program, we will create a Stack Collections, ArrayList with a few elements. Then we will add an ArrayList into another Stack collection using the addAll () method.

In the main method, a Stack<Integer> object named stack_list is created using generics to specify that it will contain integers. Five integer values (10, 20, 30, 40, and 50) are pushed onto the stack_list using the push method.