java-static-intializer-block.java

//Static Initializer Block
/*
You are given a class Solution with a main method. Complete the given code so that it outputs the area of a parallelogram with breadth  and height . You should read the variables from the standard input.

If B<=0 or H<=0 , the output should be "java.lang.Exception: Breadth and height must be positive" without quotes.

Input Format:

There are two lines of input. The first line contains : the breadth of the parallelogram. The next line contains : the height of the parallelogram.

Constraints:
-100<=B<=100
-100<=H<=100

Output Format:

If both values are greater than zero, then the main method must output the area of the parallelogram. Otherwise, print "java.lang.Exception: Breadth and height must be positive" without quotes.

Sample input 1

1
3
Sample output 1

3
Sample input 2

-1
2
Sample output 2

java.lang.Exception: Breadth and height must be positive
*/


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

public class Solution {

static boolean flag = false;
static int B,H;
static{
    //code starts here
     Scanner scanner = new Scanner(System.in);
     B = scanner.nextInt();
     H = scanner.nextInt() ;
    if(B<=0 || H<=0){
        System.out.println("java.lang.Exception: Breadth and height must be positive");
    }
    else
        flag=true;
        //code ends here
}

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

}//end of class