Stack.java

//EXAMPLE OF STACK
class Stack {
    int stck[] = new int[10];
    int tos;

    Stack(){
        tos = -1;
    }
//METHOD TO ENTER THE DATA IN THE STACK
    void push(int item){
        if (tos==9){
            System.out.println("stack is full");
        }
        else{
            stck[++tos] = item;
        }
    }
//METHOD TO RETRIVE THE DATA FROM THE STACK
    int pop(){
        if (tos<0){
            System.out.println("stack is underflow");
            return 0;
        }
        else{
            return stck[tos--];
        }

    }
}
class TestStack{
    public static void main(String[] args) {
        Stack myStack1 = new Stack();
        Stack myStack2 = new Stack();

        for (int i=0;i<10;i++){
            myStack1.push(i);
        }
        for (int i=10;i<20;i++){
            myStack2.push(i);
        }
        System.out.println("the first stack is: ");
        for (int i=0;i<10;i++){
            System.out.println(myStack1.pop());
        }
        System.out.println("the second stack is: ");
        for (int i=0;i<10;i++){
            System.out.println(myStack2.pop());
        }


    }
}