stack using arrays in java

import java.util.*;
class stack_in_arrays
{
   
public static void main(String[] args)
{
  stack_in_arrays object = new stack_in_arrays();
  Scanner vinnu = new Scanner(System.in);

    while(true)
    {
        System.out.println("Please enter the optin \n 1.push \n 2.pop \n 3.peek \n 4.isempty  \n 5.isfull \n 6.Show Stack \n 7.exit");
         System.out.println("--------------------------------------------------");
        int option=vinnu.nextInt();    
        switch(option)
        {
          case 1 : System.out.print("enter the elememt to push = ");
                   int value=vinnu.nextInt();    
                    push(value);
                    break;
          case 2 : pop();
                    break;
          case 3 : peek();
                   break;
          case 4 : isempty();
                   break;
          case 5 : isfull();
                    break;
          case 6 : fullstack();
                    break;
          case 7  : System.exit(1);
                     
        }
         System.out.println("--------------------------------------------------");
    }       
}
   
    private static final int capacity=3;
    static int stackarray[]=new int[capacity];
    static int top=-1;
   
    public static void push(int value)
    {
       if(top<capacity-1)
       {
          top++;
          stackarray[top]=value;  
           System.out.println(value+" is pushed into the stack .");
       }
        else
        {
            System.out.println("Stack is overflowed .");
        }               
    }
   
    public static void pop()
    {
      if(top>=0)
      {
          System.out.println(stackarray[top]+" is popped  out from the stack .");
          top--;
      }
        else
        {
            System.out.println("Stack  underflow .");
        }
    }
   
       
    static int peek()
    {
        if(top>=0)
        {
        return stackarray[top];
        }
        else
            return 0;
    }
   
    public static void isempty()
    {
      if(top==-1)
      {
          System.out.println("Stack is empty .");
      }
        else
        {
            System.out.println("Stack is not empty .");
        }
    }
   
    public static void isfull()
    {
         if(top==capacity-1)
      {
          System.out.println("Stack is full .");
      }
        else
        {
            System.out.println("Stack is not full .");
        }
    }
   
    public  static void fullstack()
    {
        if(top>=0)
        {
            System.out.println("Elements in the Stack ");
            for(int i=0;i<capacity;i++)
            {
                System.out.println("   --->>>"+stackarray[i]);
            }
        }
        else
        {
            System.out.println("  Stack is empty ");
        }
    }

}