Program to Implement Stack in Java

Program to Implement Stack in Java

    This program is used to demonstrate the Stack operations PUSH & POP with the help of Switch an if statements.

import java.io.*;
import java.util.*;
class Stack
{
    int a[]=new int[10];
    int top=0;
    Stack()


    {
        for(int i=0; i<5 ; i++)
        {
            a[i]=0;
        }
    }
    void push()
    {
        if(top >= 4)
        {
            System.out.println("Stack full");
        }
        else
        {
            Scanner sc1=new Scanner(System.in);
            System.out.println("Enter the item to Push");
            int y=sc1.nextInt();          
            a[top]=y;
            top++;
        }
    }
  
    void pop()
    {
        if(top <= 0)
        {
            System.out.println("Stack empty");
        }
        else
        {    top-- ;
            System.out.println("Popped element is:"+a[top]) ;
          
        }
  }
}
  class Mainstack
{
    public static void main(String args[])
    {
     try
     {
        Stack s= new Stack();
        Scanner sc=new Scanner(System.in);
        int a;
        do
        {
        System.out.println("Choose any one <1,2> to do follwing operation \n 1) PUSH \n 2) POP ");
        int x=sc.nextInt();
        switch(x)
        {
            case 1:
                s.push();
                break;
            case 2:
                s.pop();
                break;
            default :
                System.out.println("Thank You!!!");
                break;
        }
        System.out.print("Do you wish to continue \n Press \n 1 to continue \n 0 to exit :");
        a=sc.nextInt();
        }  
        while(a==1);
     }
     catch(Exception e)
     {
        System.out.println(e);
     }  
    }
}

 
Output:
Choose any one <1,2> to do follwing operation
1) PUSH
2) POP
1
Enter the item to Push
10
Do you wish to continue
Press
1 to continue
0 to exit :1
Choose any one <1,2> to do follwing operation
1) PUSH
2) POP
1
Enter the item to Push
12
Do you wish to continue
Press
1 to continue
0 to exit :1
Choose any one <1,2> to do follwing operation
1) PUSH
2) POP
1
Enter the item to Push
11
Do you wish to continue
Press
1 to continue
0 to exit :1
Choose any one <1,2> to do follwing operation
1) PUSH
2) POP
1
Enter the item to Push
15
Do you wish to continue
Press
1 to continue
0 to exit :1
Choose any one <1,2> to do follwing operation
1) PUSH
2) POP
1
Stack full
Do you wish to continue
Press
1 to continue
0 to exit :1
Choose any one <1,2> to do follwing operation
1) PUSH
2) POP
2
Popped element is:15
Do you wish to continue
Press
1 to continue
0 to exit :1
Choose any one <1,2> to do follwing operation
1) PUSH
2) POP
2
Popped element is:11
Do you wish to continue
Press
1 to continue
0 to exit :1
Choose any one <1,2> to do follwing operation
1) PUSH
2) POP
2
Popped element is:12
Do you wish to continue
Press
1 to continue
0 to exit :1
Choose any one <1,2> to do follwing operation
1) PUSH
2) POP
2
Popped element is:10
Do you wish to continue
Press
1 to continue
0 to exit :1
Choose any one <1,2> to do follwing operation
1) PUSH
2) POP
2
Stack empty
Do you wish to continue
Press
1 to continue
0 to exit :0