Re: View raw image data and string question

hi, 

I'm answer me self :-) maybe someone have similar problems....

for View Raw Image question:

in HTML5 this way is over Blob and createObjectURL...

under GWT for Blob I found much Implementations (lib-gwt-file, html5gwt, elemental ...)  but I had problems for create new Blob Object..... ( I'm newbie....I don't understand this api ...)  

ok, for create new Blob I write new JSINI

import com.google.gwt.typedarrays.shared.ArrayBuffer;

import org.vectomatic.file.Blob;

public class testjs {

public static native Blob craeteBlob( ArrayBuffer buf) /*-{

return new $wnd.Blob([buf], {type : 'image/jpeg'});

}-*/;

}

on client side 

Blob blob =testjs.craeteBlob(buff);

String objurl = FileUtils.createObjectURL(blob);

but Blob and FileUtils is from 

import org.vectomatic.file.Blob;

import org.vectomatic.file.FileUtils;

I'm ask me now what is difference in between using typedarrays.shared and elemental ? 

maybe some one have a link ?

Am Freitag, 30. Dezember 2016 01:15:40 UTC+1 schrieb Marian S:

Hi,

- String question:

I'm newbie and i'm little surprise aboud String (java) and hashcode .....

If I understand right, on each create string, created a hashcode ?  (true ?)( but I need this only for equal-method ?) 

mostly I don't need hashcode ! 

In web using very often String, for Images and Text and and ....why don't use char[] or byte[] ? 

If I transfer 100kb String Image .... I think this create hashcode, take a much performance ? (or not ?)

What is on the client side, (I don't known javascript ) GWT  translated to similar objects with hashcode ?

what is the best way ? ( today )

for keywords or links I'm very happy ! 

- View Raw Image question:

I have my Images (jpg) in database in raw format and transfer this over websocket (binary) ....now How I can performant show It ?

I see already solution with convert to Base64 ...and decompress it (jpg)  but this is not direct way ? ( take much unnecessary performance....)

what is the best way ? ( today with html5)

for keywords or links I'm very happy ! 

BR Marian

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