java

A class can only have one compareTo method but you can define as many comparators as you like for it. This is useful to define different orderings which is not such an uncommon requirement.

I would say do these steps, 1 – figure out first and last day of the week Get current week start and end date in Java – (MONDAY TO SUNDAY) 2 – check if the date falls in between that range or not Java: how do I check if a Date is within a certain … Read more

You should use a numeric data type for arithmetic operations (not Object). With out seeing the code in add() my recommendation is to store the total price in a double primitive. double price =0; for(int x = 0; x < rprice.size(); x++) { //you may need to cast/convert here price += (double)rprice.get(x); //what does this … Read more

In public void A1(int a,int b){ c = this.a+this.b; } You are ignoring the parameters you are passing to your method, and add the instance variables this.a and this.b instead. Change it to public void A1(int a,int b){ c = a+b; } in order to add the two arguments.

If your common statement same location xxx doesn’t need to be in if-else then put it out of the if-else. I guess you want this. if{ condition fails move it } else{ execute different condition and move it } same location xxx