Java Program for Stack Operations Using Arrays

import  java.io.*;
class StackArray
{
    static int max=10,i,top,ch,item;
    static int a[]=new int[10];
    StackArray()
    {
        top=-1;
    }
    public static void main(String args[])throws IOException
    {
        while((boolean)true)
        {
            System.out.println("enter 1.Push 2.Pop 3.Display 4.Exit");

            try
            {
                BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
                ch=Integer.parseInt(br.readLine());
            }
            catch(Exception e) { }
            if(ch==4)
                break;
            else
            {
                switch(ch)
                {
                case 1:
                    push();
                    break;
                case 2:
                    pop();
                    break;
                case 3:
                    display();
                    break;
                }
            }
        }
    }
    static void push()
    {
        if(top==max)
            System.out.println("stack is full");
        else

            try
            {
                BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
                System.out.println("enter the element:");
                item=Integer.parseInt(br.readLine());
                a[++top]=item;
            }
            catch(Exception e) { }
    }
    static void pop()
    {
        if(top==-1)
            System.out.println("stack is empty");
        else
            top--;
        System.out.println("poped item:"+a[top]);
    }
    static void display()
    {
        System.out.println("elements in stack are:");
        for(i=top; i>0; i--)
            System.out.println(a[i]);
    }
}

 OUTPUT:

C:\java>javac StackArray.java

C:\java>java StackArray

enter 1.Push 2.Pop 3.Display 4.Exit
1
enter the element:
10
enter 1.Push 2.Pop 3.Display 4.Exit
1
enter the element:
20
enter 1.Push 2.Pop 3.Display 4.Exit
3
elements in stack are:
20
10
enter 1.Push 2.Pop 3.Display 4.Exit
2
poped item:10
enter 1.Push 2.Pop 3.Display 4.Exit
3
elements in stack are:
10
enter 1.Push 2.Pop 3.Display 4.Exit
4

C:\java>

NOTE: c:\java> is the File Location in testing computer.