Stack using the array- Java

Stack using the array

import java.util.*;
class Stack
{
 int top;
 int  s[]=new int[10];

 Stack()
 {
  top=-1;
 }
 void push()
 {
if(top==9)
    System.out.println("Stack is full");
else{
 System.out.println("Enter data");
 Scanner sc=new Scanner(System.in);
 int d=sc.nextInt();
 s[++top]=d;
 }
}
 void pop()
 {
if(top==-1) System.out.println("stack empty");
else
  System.out.println(s[top--]);
 }
 void disp()
 {
  int i;
  System.out.println("Stack contents....");
  for(i=top;i>=0;i--)
  System.out.println(s[i]);
 }

}
class Main
{
 public static void main(String args[])
 {
 int op;
 Stack st=new Stack();
 do
 {
 System.out.println("1.push \n2.pop\n3.dis\n4.exit");
 Scanner s=new Scanner(System.in);
 op=s.nextInt();
 switch(op)
 {
  case 1:st.push();break;
  case 2:st.pop();break;
  case 3:st.disp();break;
  case 4: System.exit(0);
  }
 }
while(op!=4);
}
}

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