Best way to implement the Factory Pattern in Java

Question

I am trying to write a Factory Pattern to create either a MainMode or a TestMode in my program. The code I was previously using to create these objects was:

Answer 1

Try somthing like,

abstract class ModeFactory {

    public static Mode getMode(isMode, numberRanges, numberofGuesses) {
        return isMode ? new MainMode(numberRanges, numberofGuesses) : new TestMode(numberRanges, numberOfGuesses, randNo());
    }

    public static Mode getMode(isMode, numberRanges, numberofGuesses, someNumber) {
        return isMode ? new MainMode(numberRanges, numberofGuesses) : new TestMode(numberRanges, numberOfGuesses, someNumber);
    }

}

The class is abstract just to stop intialization. You could modify it to use final and then create a private constructor.