validDate Revisited – Java

With the updated Python function, comes an updated Java function, the code now looks like this, similar to the Python function there are two new checks and a final check that daysInMonth is not still zero:

public boolean validDate(int d, int m, int y)
    {
        int[] monthsThirty0 = {4,6,7,11};
        int[] monthsThirty1 = {1,3,5,7,8,10,12};
        int daysInMonth = 0;

        if (y > 0){
            if ((m > 0) && (m <=12)){
                if (d>0){
                    if (inArray(m, monthsThirty0)){
                        daysInMonth = 30;
                    }else if((inArray(m, monthsThirty1))){
                        daysInMonth = 31;
                    }else if(y%4 == 0){
                        daysInMonth = 29;
                    }else{
                        daysInMonth = 28;
                    }
                }
            }
        }

        if (daysInMonth > 0) {
            return (d <= daysInMonth);
        }else{
            return false;
        }
    }

With this function working correctly, I can now continue with developing the GUI.