Parenthesis matching in Java

gistfile1.java

package uni.rev.q0;

import java.util.Stack;

public class q0 {
    static class Parenthesis {
        private char parenthesis;
        private int position;
        
        public Parenthesis(char par, int pos) {
            this.parenthesis = par;
            this.position = pos;
        }
        
        @Override
        public String toString() {
            return this.parenthesis + " from position: " + this.position;
        }
    }
    
    public static void main(String[] args) {
        String data = "((())())(";
        char[] chars = data.toCharArray();
        
        Stack<Parenthesis> s = new Stack<Parenthesis>();
        
        for (int i = 0; i < chars.length; i++) {
            if (chars[i] == '(') {
                s.push(new Parenthesis('(', i + 1));
                } else if (chars[i] == ')') {
                if (!s.isEmpty()) {
                    s.pop();
                    } else {
                    System.out.println(") from position: " + (i + 1));
                    return;
                }
            }
        }
        
        if (!s.isEmpty()) {
            for (int i = 0; i < s.size(); i++) {
                System.out.println(s.pop());
            }
            } else {
            System.out.println("No errors!");
        }
    }
}