Thread: using a seperate class(newb)

Hello, my assignment was to create two classes, digit, and IP,
the function of digit is beeing well.. a digit, and ip needs to check if the ip is valid(digits are >= 0, <=255.
I got it working, however i'm wondering if it could be improved, since i need to type digit1.digit to access them...

code follows below.

Fyi, I asked a couple of questions on stackoverflow, following their rules, they insta banned me for life...
hope this isn't alike

public class IP
{
    private Digit digit1;
    private Digit digit2;
    private Digit digit3;
    private Digit digit4;
 
    public IP()
    {
    }
    public void setIPAddress(int digitA,int digitB, int digitC, int digitD)
    {   
        digit1 = new Digit(digitA);
        digit2 = new Digit(digitB);
        digit3 = new Digit(digitC);
        digit4 = new Digit(digitD);
        System.out.println(digit1.digit + "." + digit2.digit + "." + digit3.digit + "." + digit4.digit);
 
    }
    public Digit getDigit1()
    {
        return digit1;
    }
    public void getIPAddress()
    {
 
 
 
 
    }
 
    public boolean isValid()
    {
     Boolean isValid = false;
        if(digit1.digit >= 0 && digit2.digit >= 0 && digit3.digit >= 0 && digit4.digit >= 0)
        {
            if(digit1.digit <= 255 && digit2.digit <= 255 && digit3.digit <= 255 && digit4.digit <= 255)
            {
 
            System.out.println("IP Adress " + digit1.digit + "." + digit2.digit + "."
                +digit3.digit + "." + digit4.digit + " is valid.");
                isValid = true;
            }   
            else{System.out.println("Invalid adress");}
        }
        return isValid;
    }
}

public class Digit
{
    public int digit;
    public Digit(int newDigit)
    {
        digit = newDigit;
 
    }
 
    public void setDigit(int digit)
    {
 
        this.digit = digit;
 
    }
 
    public int getDigit()
    {
        return digit;
    }
    public void g()
    {
        System.out.println("bla " + digit);
    }
}

isvalid()?

Allright thanks yeah it works/all instructions done.