Java Static Initializer Block

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    import java.io.; import java.util.; import java.text.; import java.math.; import java.util.regex.*;

    public class Solution {

    public static int B;
    public static int H;
    public static boolean flag;
    
    static{
        flag=true;
        Scanner s= new Scanner(System.in);
        B=s.nextInt();
        H=s.nextInt();
    
        if (B <= 0 || H <= 0) {
            flag = false;
            System.out.println("java.lang.Exception: Breadth and height must be positive");
        }
    }
    

    public static void main(String[] args){ if(flag){ int area=B*H; System.out.print(area); }

    }//end of main
    

    }//end of class