java assignment first of OOP-Course

first.java

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package bebooked;

/**
 *
 * @author Hasnain karim
 */
public class FirstWork {
    
    public static void main(String[] args){
        sayHello();
        arithmeticOperator();
    }
    
    static void sayHello(){
        System.out.println("Hell world!");
    }
    
    static void arithmeticOperator(){
        int a , b;
        a = b = 5;
        System.out.println(a+b);
        System.out.println(a-b);
        System.out.println(a*b);
        System.out.println(a/b);
        System.out.println(a%b);
    }
    
    
}