Add java dumper

[nitzano]

Is your feature request related to a problem? Please describe.

Yes, there is only java parser at the moment without the ability to dump to java.

Describe the solution you'd like

A java dumper.

Additional context

[liron-navon]

@nitzano
Since the project started by converting enums from javascript and python, it included numeric and boolean values in them, In Java Enums simply don't have that kind of logic, for example here is a python enum, lets see how we can convert it manually:

from enum import Enum, auto, IntEnum

class Colors(Enum):
    Green = 1
    Yellow = auto()
    Blue = 'Blue'
    Red = True

Enums in python/javascript also have types, while in java, enums are of their own type (in python - auto()), there are work arounds, but they are not straight foreward, for instance we can do this, which includes a lot of boiler plate code for type conversions:

enum Colors{
    Green(1), Yellow("Yellow"), Blue("Blue"), Red(true);

    private boolean b;
    private int i;
    private String s;

    Colors(int n) {
        this.n= n;
    }

    Colors(boolean b) {
        this.b= b;
    }

    Colors(String s) {
        this.s= s;
    }

    public int numeric() {
        return n;
    }

    public boolean bool() {
        return b;
    }

    public String string() {
        return s;
    }
}

which will assert like this:

Int greenValue = Colors.Green.numeric(); // 1
String greenName= String.valueOf(Colors.Green); // "Green"

// and we also get Enum typing which could be important for java development
public class Test{
   public paint(Colors color) {/* do something with the color here*/}
}

Test t = new Test();
t.paint(1) // type error
t.paint(Colors.Green) // acceptable

But I didn't find another way to create enums with types in java... Is this a valid solution?
It could probably be better to do an object with static constants, But It is not a real "Enum" (with a type of an enum), so that is a question...

public class Colors {
   final static int Green = 1;
   final static String Yellow= "Yellow ";
   final static String Blue = "Blue ";
   final static boolean Red  = true;
}

[nitzano]

thanks! see CONTRIBUTING.md for general help.