import java.io.; import java.util.;

public class Solution {

static{

        Scanner sc = new Scanner(System.in);
        int b = sc.nextInt();
        int l = sc.nextInt();

        if(b > 0 &&  b<= 100 && l >0 && l<=100){
            System.out.println(l*b);
        }
        else{
            System.out.println("java.lang.Exception: Breadth and height must be positive");
        }

}


public static void main(String[] args) {

}

}

import java.util.*;

public class Solution {

public static void main(String[] args) {
    Scanner Scan = new Scanner(System.in);
    int b = Scan.nextInt();
    int h = Scan.nextInt();
    if(b<=0 || h<=0){
        System.out.println("java.lang.Exception: Breadth and height must be positive");
    }
    else{
        System.out.println(b*h);
    }
}

}

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Here is Java Static Initializer Block solution - https://programmingoneonone.com/hackerrank-java-static-initializer-block-solution.html

import java.io.; import java.util.;

public class Solution {

static int B, H;
static boolean flag = true;

// Static block to initialize and validate B and H
static {
    Scanner sc = new Scanner(System.in);
    B = sc.nextInt();
    H = sc.nextInt();

    if (B <= 0 || H <= 0) {
        flag = false;
        System.out.println("java.lang.Exception: Breadth and height must be positive");
    }
    sc.close();
}

public static void main(String[] args) {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */

    if (flag) {
        int area = B * H;
        System.out.println(area);
    }
}

} **