Java Static Initializer Block

import java.io.*;

import java.util.*;

import java.text.*;

import java.math.*;

import java.util.regex.*;

public class Solution {

public static int B, H;

public static boolean flag;

static {

Scanner scanner = new Scanner(System.in);

B = scanner.nextInt();

H = scanner.nextInt();

flag = true;

if (B <= 0 || H <= 0) {

System.out.println("java.lang.Exception: Breadth and height must be positive");

flag = false;

}

scanner.close();

}

public static void main(String[] args){

        if(flag){

            int area=B*H;

            System.out.print(area);

        }

        

    }//end of main

}//end of class