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  1. /*
  2.  *  Java Program to Check for balanced paranthesis by using Stacks
  3.  */
  4.  
  5. import java.util.*;
  6.  
  7. public class ParenthesisMatching
  8. {
  9.     public static void main(String[] args) 
  10.     {
  11.         Scanner scan = new Scanner(System.in);
  12.         /* Creating Stack */
  13.         Stack<Integer> stk = new Stack<Integer>();
  14.         System.out.println("Parenthesis Matching Test\n");
  15.         /* Accepting expression */
  16.         System.out.println("Enter expression");
  17.         String exp = scan.next();        
  18.         int len = exp.length();
  19.         System.out.println("\nMatches and Mismatches:\n");
  20.         for (int i = 0; i < len; i++)
  21.         {    
  22.             char ch = exp.charAt(i);
  23.             if (ch == '(')
  24.                 stk.push(i);
  25.             else if (ch == ')')
  26.             {
  27.                 try
  28.                 {
  29.                     int p = stk.pop() + 1;
  30.                     System.out.println("')' at index "+(i+1)+" matched with ')' at index "+p);
  31.                 }
  32.                 catch(Exception e)
  33.                 {
  34.                     System.out.println("')' at index "+(i+1)+" is unmatched");
  35.                 }
  36.             }            
  37.         }
  38.         while (!stk.isEmpty() )
  39.             System.out.println("'(' at index "+(stk.pop() +1)+" is unmatched");
  40.     }
  41. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
Main.java:7: error: class ParenthesisMatching is public, should be declared in a file named ParenthesisMatching.java
public class ParenthesisMatching
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/8Q2dJm
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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