Question

does anybody know how to do a method to find the occurrences of a string on the stack? I am very stumped with this assignment

Answer 1

import java.util.Stack;

public class StackCount {

    public static int countOnStack(Stack<String> stack, String str) {
        int count = 0;
        while (!stack.isEmpty()) {
            if (stack.pop().equals(str)) {
                ++count;
            }
        }
        return count;
    }

    public static void main(String[] args) {
        Stack<String> stack = new Stack<>();
        stack.push("hello");
        stack.push("hi");
        stack.push("hello");
        stack.push("how");
        stack.push("are");
        stack.push("you?");
        System.out.println(countOnStack(stack, "hello"));
    }
}