Re: Translating Java into D

2019-11-16 Thread Jacob Carlborg via Digitalmars-d-learn

On 2019-11-14 20:50, NonNull wrote:
Greetings, Java seems to be almost a subset of D in various ways. Has 
there been any work done to automatically translate Java source into D?


Yes, I'm working on a tool, JPort [1], for automatically translating 
Java to D. It's not done yet and there's been a couple of years now 
since I last worked on the project.


[1] https://github.com/d-widget-toolkit/jport/tree/dev

--
/Jacob Carlborg


Re: Translating Java into D

2019-11-16 Thread Jacob Carlborg via Digitalmars-d-learn

On 2019-11-16 08:13, GreatSam4sure wrote:

I am of the opinion that D is much more powerful than Java since I am 
familiar with the language to some extent. I am even to start a GUI app 
in java due to the fact I have no find a GUI toolkit in D that meet all 
my need.


There's DWT [1], which is a port of the Eclipse SWT Java library.

[1] https://github.com/d-widget-toolkit/dwt

--
/Jacob Carlborg


Re: Translating Java into D

2019-11-16 Thread Alexandru Ermicioi via Digitalmars-d-learn

On Friday, 15 November 2019 at 03:29:16 UTC, Heromyth wrote:

On Thursday, 14 November 2019 at 19:50:22 UTC, NonNull wrote:
Greetings, Java seems to be almost a subset of D in various 
ways.
No, it's not exactly right. Java is more powerful than D as for 
a language. Many things that Java can do can't be done by D. 
For example, reflection, full meta info for a type  in runtime, 
type deduction for a template, template member override.


See:
https://stackoverflow.com/questions/4829631/unusual-generic-syntax-arrays-stringaslist
https://www.baeldung.com/java-executor-service-tutorial

Has there been any work done to automatically translate Java 
source into D?


We ported some projects in Java by hand.


Regarding template member override. Generics in java are mainly 
compile time thing that boils down to auto generated casts when 
working with generic types (in bytecode), and therefore a 
templated method in java is actually a standard method that just 
works with Object class under the hood, hence it is possible to 
override in implementor of interface/class. It can be done in D 
too you'll just need to strip out generics part in method 
declaration and just use casts from root Object for worst case.


Also what do you mean by "type deduction for a template"?

Best regards,
Alexandru.


Re: Translating Java into D

2019-11-15 Thread GreatSam4sure via Digitalmars-d-learn

On Friday, 15 November 2019 at 03:29:16 UTC, Heromyth wrote:

On Thursday, 14 November 2019 at 19:50:22 UTC, NonNull wrote:
Greetings, Java seems to be almost a subset of D in various 
ways.
No, it's not exactly right. Java is more powerful than D as for 
a language. Many things that Java can do can't be done by D. 
For example, reflection, full meta info for a type  in runtime, 
type deduction for a template, template member override.


See:
https://stackoverflow.com/questions/4829631/unusual-generic-syntax-arrays-stringaslist
https://www.baeldung.com/java-executor-service-tutorial

Has there been any work done to automatically translate Java 
source into D?


We ported some projects in Java by hand.



?
I really sure of this? Can this be true
? Pls I need more clarity on this by professional in this group.


I am of the opinion that D is much more powerful than Java since 
I am familiar with the language to some extent. I am even to 
start a GUI app in java due to the fact I have no find a GUI 
toolkit in D that meet all my need.


I will appreciate detail analysis of this claim


Re: Translating Java into D

2019-11-15 Thread DanielG via Digitalmars-d-learn

Potentially relevant old thread:

https://forum.dlang.org/thread/ssdcoqhylmskfytfi...@forum.dlang.org



Re: Translating Java into D

2019-11-15 Thread Heromyth via Digitalmars-d-learn

On Friday, 15 November 2019 at 13:15:29 UTC, Andre Pany wrote:

On Friday, 15 November 2019 at 03:29:16 UTC, Heromyth wrote:

On Thursday, 14 November 2019 at 19:50:22 UTC, NonNull wrote:
Greetings, Java seems to be almost a subset of D in various 
ways.
No, it's not exactly right. Java is more powerful than D as 
for a language. Many things that Java can do can't be done by 
D. For example, reflection, full meta info for a type  in 
runtime, type deduction for a template, template member 
override.


See:
https://stackoverflow.com/questions/4829631/unusual-generic-syntax-arrays-stringaslist
https://www.baeldung.com/java-executor-service-tutorial

Has there been any work done to automatically translate Java 
source into D?


We ported some projects in Java by hand.


With the compile time reflection capabilities of D you can 
build a runtime reflection system. Therefore I would say D has 
reflection.


The other points I do not have enough knowledge what Java 
provides.


Kind regards
Andre


Yes, you can do everything with D in theory. The fact is that 
there are many stuff waiting for you to implement them when you 
are porting a project from Java to D, like the different or 
missing APIs, language features etc.


See what we got from the portings:

Containers: 
https://github.com/huntlabs/hunt/tree/master/source/hunt/collection
Threading: 
https://github.com/huntlabs/hunt/tree/master/source/hunt/concurrency




Re: Translating Java into D

2019-11-15 Thread Andre Pany via Digitalmars-d-learn

On Friday, 15 November 2019 at 03:29:16 UTC, Heromyth wrote:

On Thursday, 14 November 2019 at 19:50:22 UTC, NonNull wrote:
Greetings, Java seems to be almost a subset of D in various 
ways.
No, it's not exactly right. Java is more powerful than D as for 
a language. Many things that Java can do can't be done by D. 
For example, reflection, full meta info for a type  in runtime, 
type deduction for a template, template member override.


See:
https://stackoverflow.com/questions/4829631/unusual-generic-syntax-arrays-stringaslist
https://www.baeldung.com/java-executor-service-tutorial

Has there been any work done to automatically translate Java 
source into D?


We ported some projects in Java by hand.


With the compile time reflection capabilities of D you can build 
a runtime reflection system. Therefore I would say D has 
reflection.


The other points I do not have enough knowledge what Java 
provides.


Kind regards
Andre


Re: Translating Java into D

2019-11-14 Thread Heromyth via Digitalmars-d-learn

On Thursday, 14 November 2019 at 19:50:22 UTC, NonNull wrote:
Greetings, Java seems to be almost a subset of D in various 
ways.
No, it's not exactly right. Java is more powerful than D as for a 
language. Many things that Java can do can't be done by D. For 
example, reflection, full meta info for a type  in runtime, type 
deduction for a template, template member override.


See:
https://stackoverflow.com/questions/4829631/unusual-generic-syntax-arrays-stringaslist
https://www.baeldung.com/java-executor-service-tutorial

Has there been any work done to automatically translate Java 
source into D?


We ported some projects in Java by hand.


Translating Java into D

2019-11-14 Thread NonNull via Digitalmars-d-learn
Greetings, Java seems to be almost a subset of D in various ways. 
Has there been any work done to automatically translate Java 
source into D?