Java Core: Thêm và Xóa phần tử mảng Array trên JAVA

Ouput:

SimpleStack.java

Java Core 2017

package com.array;

/**
 * Created by Antonio 11/06/17.
 */
public class SimpleStack {

    char charr[] = new char[5];
    int top = -1;

    public boolean isEmpty() {
        if (charr[0] == '\0') {
            return true;
        }
        return false;
    }

    public boolean isFull() {
        if (charr.length == top) {
            return true;
        } else {
            return false;
        }
    }

    public void push(char ch) {
        if (!isFull()) {
            top++;
            charr[top] = ch;

        } else {
            System.out.println("stack is full");
        }
    }

    public char pop() {
        char chh = charr[top];
        if (!isEmpty()) {

            charr[top] = '\0';
            top--;
        } else {
            System.out.println("stack is empty");
        }
        return chh;
    }

    public void display() {
        System.out.println();
        for (int i = 0; i < charr.length; i++) {
            System.out.printf("\t -->" + charr[i]);
        }
    }

    public static void main(String[] args) {
        SimpleStack simpleStack = new SimpleStack();
        // simpleStack.pop();
        simpleStack.push('a');
        simpleStack.push('b');
        simpleStack.push('c');
        simpleStack.push('d');
        simpleStack.push('e');
        simpleStack.display();
        simpleStack.pop();
        simpleStack.push('F');
        simpleStack.display();

    }
}