Stackk

/**
 * Write a description of class Stack here.
 *
 * @author Samuel Berkat Hulu
 * @version 5.0 21-April-2021
 */
public class Stack
{
    private int maxSize;
    private char[] stackArray;
    private int top;

    public Stack(int s) // konstruktor
    {
        maxSize = s;
        stackArray = new char[maxSize];
        top = -1;
    }
    //Masukan intem diatas tumpukan
    public void push(char j)
    { stackArray[++top] = j; }
     //Ambil item dari atas tumpukan
    public char pop()
    { return stackArray[top--]; }
    //Melihat intem diatas tumpukan
    public char peek()
    { return stackArray[top]; }
    // benar jika tumpukan kosong
    public boolean isEmpty()
    { return (top == -1); }
    // ukuran pengembalian
    public int size()
    { return top+1; }
    // kembalikan item pada indeks n
    public char peekN(int n)
    { return stackArray[n]; }
}