Java balanced expressions check {[()]}

Question

I am trying to create a program that takes a string as an argument into its constructor. I need a method that checks whether the string is a balanced parenthesized expressio

Answer 1

How about this one, it uses both concept of stack plus counter checks:

import java.util.*;
class Solution{

public static void main(String []argh)
{
   Scanner sc = new Scanner(System.in);
   while (sc.hasNext()) {
      String input=sc.next();
      Stack stk = new Stack();
      char[] chr = input.toCharArray();
      int ctrl = 0, ctrr = 0;
      if(input.length()==0){
          System.out.println("true");
      }
      for(int i=0; i