Balanced Paranthesis (I Don,t know the error )

import java.util.*;
public class Main {

public static void main(String[] args) throws Exception {
    // TODO Auto-generated method stub
    Scanner s = new Scanner(System.in);
    String str = s.next();
    Main mainobj = new Main();
    StacksUsingArrays stack = mainobj.new StacksUsingArrays(100);
    if (isBalanced(str, stack)) {
        System.out.println("Yes");
    } else {
        System.out.println("No");
    }

}


public static boolean isBalanced(String str, StacksUsingArrays stack) throws Exception {

    while(str.length()!=0){

        char ch=str.charAt(0);

        if(ch=='('||ch=='{'||ch=='['){
            stack.push(1);
            //stack.display();
            str=str.substring(1);

        }

        if(ch==')'||ch=='}'||ch==']') {
            if (stack.isEmpty()) {
                return false;
            }

            stack.pop();

            str=str.substring(1);
        }



    }

    if(stack.isEmpty()){
        return true;
    }else{
        return false;
    }


}

private class StacksUsingArrays {
    private int[] data;
    private int tos;

    public static final int DEFAULT_CAPACITY = 100;

    public StacksUsingArrays() throws Exception {
        // TODO Auto-generated constructor stub
        this(DEFAULT_CAPACITY);
    }

    public StacksUsingArrays(int capacity) throws Exception {
        if (capacity <= 0) {
            System.out.println("Invalid Capacity");
        }
        this.data = new int[capacity];
        this.tos = -1;
    }

    public int size() {
        return this.tos + 1;
    }

    public boolean isEmpty() {
        if (this.size() == 0) {
            return true;
        } else {
            return false;
        }
    }

    public void push(int item) throws Exception {
        if (this.size() == this.data.length) {
            throw new Exception("Stack is Full");
        }
        this.tos++;
        this.data[this.tos] = item;
    }

    public int pop() throws Exception {
        if (this.size() == 0) {
            throw new Exception("Stack is Empty");
        }
        int retVal = this.data[this.tos];
        this.data[this.tos] = 0;
        this.tos--;
        return retVal;
    }

    public int top() throws Exception {
        if (this.size() == 0) {
            throw new Exception("Stack is Empty");
        }
        int retVal = this.data[this.tos];
        return retVal;
    }

    public void display() throws Exception {
        if (this.size() == 0) {
            throw new Exception("Stack is Empty");
        }
        for (int i = this.tos; i >= 0; i--) {
            System.out.print(this.data[i] +"    ");
        }

    }

}

}

public static boolean isBalanced(String str, StacksUsingArrays stack) throws Exception { while(str.length()!=0){ char ch=str.charAt(0); if(ch==’(’||ch==’{’||ch==’[’){ stack.push(1); //stack.display(); str=str.substring(1); } if(ch==’)’||ch==’}’||ch==’]’) { if (stack.isEmpty()) { return false; } stack.pop(); str=str.substring(1); } } if(stack.isEmpty()){ return true; }else{ return false; } }

Hello @S18ML0036,

Please, share your code using some online IDE.
The way you have shared it may introduce many sntax errors to it.

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