I'm trying to introduce internationalization support for my app...I created it as a netbeans java desktop application. Netbeans automatically introduced the following code :
public class ABC extends FrameView{
//constructor
public ABC(Singleframeapplication app)
{
//introduced by netbeans automatically
ResourceMap resourceMap=getResourceMap();
//
}
}
how do i used this resourcemap object to set the locale(eg. FR) for my entire app?
PS:i have created ABC_FR.properties in /ABC/resources folder
Thanks
I made this work by adding a call to Locale.setDefault() in the main of my app:
public static void main(String[] args) {
System.out.println(Locale.getDefault()); // the JVM defaults to es_ES on my machine, so this prints "es_ES"
Locale.setDefault(Locale.ENGLISH); // set it to English
System.out.println(Locale.getDefault()); // Now it prints "en"
launch(MyNiceApp.class, args); // my app comes up in English now
}
This is documented relatively well here: http://java.sun.com/developer/technicalArticles/J2SE/locale/
The problem with the documentation is that it discusses in detail the most complicated cases, and glosses over the most simple case of putting the whole application in a specific language, which would seem to be what most programmers would want.
Related
I recently upgraded my IDEA and now using IntelliJ IDEA 2022.2 Ultimate Edition.
I found the Complete Current Statement in Scala code behaves differently as in Java code, which is very annoying.
For example in Java code:
public static void main(String[] args) {
String foo = "bar"
}
Press Complete Current Statement shortcut(shift+cmd+enter for me) anywhere in line #2, will add a ; at the end of the line, and an auto-indent will be applied too:
public static void main(String[] args) {
String foo = "bar";
}
Then press Complete Current Statement again will bring you to a new line when there is nothing more to adjust.
public static void main(String[] args) {
String foo = "bar";
}
In previous version of IntelliJ, I roughly remember the behavior is same for Scala code.
But in this version of IntelliJ, when I try to do samething in Scala code, for example:
def foo (): Unit = {
throw new RuntimeException
}
When I press Complete Current Statement in line #2, nothing happens.
Could anyone please help me checkout why or how should I config to align with Java code's behavior? Thank you very much!
You don't need to use that in Scala because semicolons are optional, and almost never used. Actually, your Scala code sample is already what you would call a "complete statement".
For formatting what I do and recommend is having set File -> Settings -> Tools -> Actions on save and check Reformat code and optionally Optimize imports, and it will do both whenever you save your source file using Ctrl + S. I believe it's Cmd + S on your Mac.
This uses the default Intellij Formatter for Scala. Scala also has it's own Formatter called Scalafmt with customizable setups more control of formatting different Scala features based on your preferences. This is located at Settings -> Editor -> Code Style -> Scala.
If for some reason you would still like to use your shortcut key, then the only thing the Complete current statement can do to your Scala code is auto-indenting the current line, which for some reason it doesn't so it seems to be a bug on Intellij's side. But what you can do is replace the Auto-Indent Lines shortcut key to use your Complete current statement shortcut key instead and get the same behavior.
Good day, i have a Processing sketch that i want to use in a web application
i am using jsp and servlets in my web app with tomcat as a server. I am using netbeans and i tried using < applet > tag but i can't get it to work, please help.
CODE:
import processing.core.*;
public class MyProcessingSketch extends PApplet {
public static void main(String args[]) {
PApplet.main(new String[] { "MyProcessingSketch" });
}
public void setup() {
}
#Override
public void draw() {
background (200,0,0);
}
public void settings(){
size(600,240);
}
public void mousePressed(){
exit();
}
}
Applets are not really supported anymore... But you might try p5js. Your HTML page would look like this:
<html>
<script src="http://cdnjs.cloudflare.com/ajax/libs/p5.js/0.4.6/p5.js"></script>
<script>
function setup() {
createCanvas(600, 240);
background(200,0,0);
}
function draw() {
// ...
}
</script>
Like the other answer says, applets are pretty much dead. They currently require you to have a paid signed certificate or for your users to change their security settings. And even then they show a bunch of scary warning dialogs, and it's just a pain in the neck for everybody. Chrome has dropped support for applets, and they'll be deprecated in the next version of Java.
If you're using eclipse, you've got three options:
Deploy as a runnable jar.
Deploy as a packaged executable.
Deploy using webstart.
None of these are embedding an applet in a webpage.
However, if you're using the Processing editor, you can use Processing.js to write the same Processing code but have it deployed as JavaScript, which you can embed in a webpage. Processing.js does the translation for you, so you don't have to change your code into JavaScript code.
You can also use p5.js, but that will require you to completely rewrite your syntax into JavaScript syntax.
In either case, you'll no longer be able to use Java libraries in your code. You'll have to find a JavaScript library that does the same things and use that instead. If you really need to use the Java libraries, then you have to go with deploying using one of the first three options.
I search the web for hours, but could not find a helpful direction.
I need to use Java to create a code that "catches" the source code
that the user is asking from the browser.
The application: (the basic idea)
public static void main(String[] args) {
String sourceCode;
initialize();
start();
waitingForSourceCode();
sourceCode = catchingTheSourceCode();
System.out.println(sourceCode);
}
Behind the scenes:
the application "catches" the source code of the web page.
And print it to console.
How to implement these methods?
waitingForSourceCode();
catchingTheSourceCode();
If you are using a WebDriver, you can get the page source using the getPageSource() method:
catchingTheSourceCode(){
System.out.println(driver.getPageSource());
}
I need to test a webpage via desktop application, I'm trying to use
the selenium IDE, I had sucess to create the test cases, but I'm not
able to execute them on java.
I've been looking for something helpful, but I can't find any help at all.
Thank you
A framework that has been created for just this cause, (it's in Java) can be downloaded here or you can check the project out from github here.
This project was designed to be very simple, yet very effective. This type of framework is a "free version" of my interpretation of a framework that I use every day in production-type environments.
There is a sample test that is enclosed in the project named SampleFunctionalTest.java. Assuming you follow the ReadMe to the T, you should have no problem getting started.
Here is what a test would look like in this framework.
#Config(url = "http://ddavison.github.io/tests/getting-started-with-selenium.htm", browser = Browser.FIREFOX) // You are able to specify a "base url" for your test, from which you will test. You may leave `browser` blank.
public class SampleFunctionalTest extends AutomationTest {
/**
* You are able to fire this test right up and see it in action. Right click the test() method, and click "Run As... jUnit test".
*
* The purpose of this is to show you how you can continue testing, just by taking the semi colon out, and continuing with your test.
*/
#Test
public void test() {
// click / validateAttribute
click(props.get("click"))
.validateAttribute(props.get("click"), "class", "success") // validate that the class indeed added.
// setText / validateText
.setText(By.id("setTextField"), "woot!")
.validateText(By.id("setTextField"), "woot!") // validates that it indeed set.
// check / uncheck
.check(By.id("checkbox"))
.validateChecked(By.id("checkbox")) // validate that it checked
.check(props.get("radio.2")) // remember that props come from <class name>.properties, and are always CSS selectors. (why use anything else, honestly.)
.validateUnchecked(props.get("radio.1")) // since radio 1 was selected by default, check the second one, then validate that the first radio is no longer checked.
// select from dropdowns.
.selectOptionByText(By.xpath("//select[#id='select']"), "Second") // just as a proof of concept that you can select on anything. But don't use xpath!!
.validateText(By.id("select"), "2") // validateText() will actually return the value="" attr of a dropdown, so that's why 2 works but "Second" will not.
.selectOptionByValue(By.cssSelector("select#select"), "3")
.validateText(props.get("select"), "3")
// frames
.switchToFrame("frame") // the id="frame"
.validatePresent(By.cssSelector("div#frame_content"))
// windows
.switchToWindow("Getting Started with Selenium") // switch back to the test window.
.click(By.linkText("Open a new tab / window"))
.waitForWindow("Google") // waits for the url. Can also be the you are expecting. :) (regex enabled too)
.setText(By.name("q"), "google!")
.closeWindow(); // we've closed google, and back on the getting started with selenium page.
}
}
You should create an instance of a WebDriver and call methods on the instance of that object.
An easy example is shown here: http://www.seleniumhq.org/docs/03_webdriver.jsp#introducing-the-selenium-webdriver-api-by-example
I hope you have created the script in webdriver.
Now in the script recorded by the selenium ide you have three methods called
setup, testSomeName and tearDown.
From the very basic: to run this script all you need to do is create a main method in the same class and in that you need to call these methods in the same order as specified above.
After that you just need to run that program.
Here is an example to make it more clear:
public class p_adjcb {
public void setUp() throws Exception {
}
public void testP_adjcb() throws Exception {
}
public void tearDown() throws Exception {
}
public static void main(String[] args) {
p_adjcb obj = new p_adjcb();
try {
obj.setUp();
obj.testP_adjcb();
obj.tearDown();
} catch (Exception ex) {
}
}
}
If you get any compiler error make sure you have downloaded the selenium-standalone-server.jar file and added it to your class path.
This is a very basic start. Later on you may need to use som framework like junit.
Hope it helps.
I have code which uses ScriptEngineManager, ScriptEngine class for executing JavaScript code using Java. But it works fine in Java SE, and doesn't work in Android - SDK show error of missing classes. Is it possible to execute JS code in Android? Thank you.
AndroidJSCore is a great one. And here is another little library I wrote for evaluating JavaScript:
https://github.com/evgenyneu/js-evaluator-for-android
jsEvaluator.evaluate("function hello(){ return 'Hello world!'; } hello();", new JsCallback() {
#Override
public void onResult(final String result) {
// get result here (optional)
}
});
It creates a WebView behind the scenes. Works on Android version 3 and newer.
You can use Webview which inherits View class. Make an XML tag and use findViewById() function to use in the activity. But to use the JavaScript, you can make a HTML file containing the JavaScript code. The example blelow might help.
Webview browser=(Webview) findViewById(R.main.browser); //if you gave the id as browser
browser.getSettings().setJavaScriptEnabled(true); //Yes you have to do it
browser.loadUrl("file:///android_asset/JsPage.html"); //If you put the HTML file in asset folder of android
Remember that the JS will run on WebView, not in native environment, thus you might experience a lag or slow FPS in emulator. However when using on an actual phone, the code may run fast, depending on how fast is your phone.
http://divineprogrammer.blogspot.com/2009/11/javascript-rhino-on-android.html will get you started. ScriptEngine is a java thing. Android doesn't have a JVM but a DalvikVM which is not identical but similar.
UPDATE 2018: AndroidJSCore has been superseded by LiquidCore, which is based on V8. Not only does it include the V8 engine, but all of Node.js is available as well.
Original answer:
AndroidJSCore is an Android Java JNI wrapper around Webkit's JavaScriptCore C library. It is inspired by the Objective-C JavaScriptCore Framework included natively in iOS 7. Being able to natively use JavaScript in an app without requiring the use of JavaScript injection on a bloated, slow, security-constrained WebView is very useful for many types of apps, such as games or platforms that support plugins. However, its use is artificially limited because the framework is only supported on iOS. Most developers want to use technologies that will scale across both major mobile operating systems. AndroidJSCore was designed to support that requirement.
For example, you can share Java objects and make async calls:
public interface IAsyncObj {
public void callMeMaybe(Integer ms, JSValue callback) throws JSException;
}
public class AsyncObj extends JSObject implements IAsyncObj {
public AsyncObj(JSContext ctx) throws JSException { super(ctx,IAsyncObj.class); }
#Override
public void callMeMaybe(Integer ms, JSValue callback) throws JSException {
new CallMeLater(ms).execute(callback.toObject());
}
private class CallMeLater extends AsyncTask<JSObject, Void, JSObject> {
public CallMeLater(Integer ms) {
this.ms = ms;
}
private final Integer ms;
#Override
protected JSObject doInBackground(JSObject... params) {
try {
Thread.sleep(ms);
} catch (InterruptedException e) {
Thread.interrupted();
}
return params[0];
}
#Override
protected void onPostExecute(JSObject callback) {
JSValue args [] = { new JSValue(context,
"This is a delayed message from Java!") };
try {
callback.callAsFunction(null, args);
} catch (JSException e) {
System.out.println(e);
}
}
}
}
public void run() throws JSException {
AsyncObj async = new AsyncObj(context);
context.property("async",async);
context.evaluateScript(
"log('Please call me back in 5 seconds');\n" +
"async.callMeMaybe(5000, function(msg) {\n" +
" alert(msg);\n" +
" log('Whoomp. There it is.');\n" +
"});\n" +
"log('async.callMeMaybe() has returned, but wait for it ...');\n"
);
}
I was also looking for a way to run javascript on Android and came across j2v8 library. This is a java wrapper for Google's v8 engine.
To use it add a dependency:
compile 'com.eclipsesource.j2v8:j2v8_android:3.0.5#aar'
It has pretty simple api, but I haven't found any docs online apart from javadoc in maven repository. The articles on their blog are also useful.
Code sample from this article:
public static void main(String[] args) {
V8 runtime = V8.createV8Runtime();
int result = runtime.executeIntegerScript(""
+ "var hello = 'hello, ';\n"
+ "var world = 'world!';\n"
+ "hello.concat(world).length;\n");
System.out.println(result);
runtime.release();
}
The javax.script package is not part of the Android SDK. You can execute JavaScript in a WebView, as described here. You perhaps can use Rhino, as described here. You might also take a look at the Scripting Layer for Android project.
You can use Rhino library to execute JavaScript without WebView.
Download Rhino first, unzip it, put the js.jar file under libs folder. It is very small, so you don't need to worry your apk file will be ridiculously large because of this one external jar.
Here is some simple code to execute JavaScript code.
Object[] params = new Object[] { "javaScriptParam" };
// Every Rhino VM begins with the enter()
// This Context is not Android's Context
Context rhino = Context.enter();
// Turn off optimization to make Rhino Android compatible
rhino.setOptimizationLevel(-1);
try {
Scriptable scope = rhino.initStandardObjects();
// Note the forth argument is 1, which means the JavaScript source has
// been compressed to only one line using something like YUI
rhino.evaluateString(scope, javaScriptCode, "JavaScript", 1, null);
// Get the functionName defined in JavaScriptCode
Object obj = scope.get(functionNameInJavaScriptCode, scope);
if (obj instanceof Function) {
Function jsFunction = (Function) obj;
// Call the function with params
Object jsResult = jsFunction.call(rhino, scope, scope, params);
// Parse the jsResult object to a String
String result = Context.toString(jsResult);
}
} finally {
Context.exit();
}
You can see more details at my post.
Given that ScriptEngineManager and ScriptEngine are part of the JDK and Android SDK is not the same thing as the JDK I would say that you can't use these classes to work with JavaScript under Android.
You can check the Android SDK's reference documentation/package index to see what classes are included (what can you work on Android out of the box) and which of them are missing.
I just found the App JavaScript for Android, which is the Rhino JavaScript engine for Java. It can use all Java-classes, so it has BIG potential. The problem is it might be slow, since it is not really optimized (heavy CPU load). There is another JavaScript engine named Nashorn, but that unfortunately doesn't works on Google's DalvikVM Java engine (does not support the optimizations of Oracle Java engine). I hope Google keeps up with that, I would just love it!
If you want to run some javascript code on chrome browser as per the question copy this code and paste it into address bar:
data:text/html, <html contenteditable> <title> Notepad </title> <script> alert('Abhasker Alert Test on Mobile'); </script> </html>