I have build a jar file and trying to use it in j2me application. I have included the jar in the build path and imported the required classes as well. But when I run my j2me application I am getting NoClassDefFound Error in the line where I am trying to instantiate the class which is present in the jar.
I can instantiate the classes of the jar in the java project but not in j2me.
Below is the error log:
WARNING - MMA -
C:/Builds/jme-sdk/javacall-javame-sdk-305/implementation/share/jsr135_mmapi/ju_mmconfig.c
line 801: caps: optional settings missing: SuspendBehavior
java.lang.NoClassDefFoundError: com/canvasm/ida/gps/LocationUpdater
- com.test.ida.HelloIDA.(HelloIDA.java:11)
- java.lang.Class.newInstance(), bci=0
- com.sun.midp.main.CldcMIDletLoader.newInstance(), bci=46
- com.sun.midp.midlet.MIDletStateHandler.createMIDlet(), bci=66
- com.sun.midp.midlet.MIDletStateHandler.createAndRegisterMIDlet(), bci=17
- com.sun.midp.midlet.MIDletStateHandler.startSuite(), bci=27
- com.sun.midp.main.AbstractMIDletSuiteLoader.startSuite(), bci=52
- com.sun.midp.main.CldcMIDletSuiteLoader.startSuite(), bci=8
- com.sun.midp.main.AbstractMIDletSuiteLoader.runMIDletSuite(), bci=161
- com.sun.midp.main.AppIsolateMIDletSuiteLoader.main(), bci=26 javacall_lifecycle_state_changed() lifecycle: event is
JAVACALL_LIFECYCLE_MIDLET_SHUTDOWN status is JAVACALL_OK
TestApp(j2me app):
import com.test.gps.LocationUpdater;
public class Hello extends MIDlet {
public Hello() {
LocationUpdater loc = new LocationUpdater();
System.out.println("Loc updater object :"+loc.toString());
}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
// TODO Auto-generated method stub
}
protected void pauseApp() {
// TODO Auto-generated method stub
}
protected void startApp() throws MIDletStateChangeException {
}
}
JAR file main class:
public class LocationUpdater {
private boolean isUpdateSuccess = false;
public static void main(String[] args){
}
public boolean updateLocation(final String serverUrl, final String userMSISDN) throws LocationException{
AppConstants.url = serverUrl;
AppConstants.msisdn = userMSISDN;
LocationCanvas loc = new LocationCanvas();
isUpdateSuccess = loc.getLocation(serverUrl, userMSISDN);
return isUpdateSuccess;
}
}
LocationCanvas class:
public class LocationCanvas {
private Location location;
private LocationProvider locationProvider;
private Coordinates coordinates;
private Criteria criteria;
private Timer tm;
private double lat, lon;
private String posturl;
private boolean status,updateStatus;
public LocationCanvas() {
}
public boolean getLocation(String url, String msisdn) {
tm = new Timer();
criteria = new Criteria();
criteria.setHorizontalAccuracy(500);
try {
locationProvider = LocationProvider.getInstance(criteria);
if (locationProvider != null) {
tm.wait(4000);
try {
location = locationProvider.getLocation(2000);
} catch (Exception e) {
System.out.println(e.getMessage());
}
coordinates = (Coordinates)location.getQualifiedCoordinates();
if (coordinates != null) {
// Use coordinate information
lat = coordinates.getLatitude();
lon = coordinates.getLongitude();
System.out.println("Latitude :"+lat);
System.out.println("Longitude :"+lon);
}
posturl = url + "?IMEI=" + msisdn
+ "&positioningtype=" + "gps" + "&locationdata=" + lat
+ "," + lon;
}else{
//return false.. cos location provider is null
updateStatus = false;
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
return updateStatus;
}
error log:
Exception in thread "main" java.lang.NoClassDefFoundError:
javax/microedition/location/Coordinates
at com.canvasm.ida.gps.LocationUpdater.updateLocation(LocationUpdater.java:17)
at com.test.HelloTest.main(HelloTest.java:10)
Caused by: java.lang.ClassNotFoundException: javax.microedition.location.Coordinates
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
Any help would be appreciated.
It specifies that class file present at compile time is not found at run time.Check for build time and run time classpaths .
Finally able to solve the issue.
The problem was not in the code. It was due to the compilation issue.
First of all To solve the NoClassDefFoundError , I had to right click on the project and in the build path-> order and export -> check the jar that you have added.
Later while running I faced classFormatError 56.
The jar file which was created, was compiled using 1.6v.
And the j2me application was getting compiled with 1.3v.
I had to recompile my library project with 1.3v and create a jar out of it and used it in the j2me application.
Here is the link to guide: Build a Project from the Command Line - Java ME SDK
Related
I am not able to understand what is required as parameter, can anyone help me with this.
I have written below code:-
#Test(groups = "cucumber", description = "Runs Cucumber Feature", dataProvider = "features")
public void feature(CucumberFeatureWrapper cucumberFeature) throws Exception {
testNGCucumberRunner.runCucumber(cucumberFeature.getCucumberFeature());
}
#AfterMethod(alwaysRun = true)
public void tearDown(Scenario scenario) {
scenario.write("Finished Scenario");
if (scenario.isFailed()) {
String screenshotName = scenario.getName().replaceAll(" ", "_");
try {
File sourcePath =((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);
File destinationPath = new File(System.getProperty("user.dir") + "/Screenshots/" + screenshotName + ".png");
Files.copy(sourcePath, destinationPath);
Reporter.addScreenCaptureFromPath(destinationPath.toString());
} catch (IOException e) {
}
driver.close();
}
}
And I am getting below error:-
FAILED CONFIGURATION: #AfterMethod tearDown
org.testng.TestNGException: Method tearDown requires 1 parameters but
0 were supplied in the #Configuration annotation.
You cannot pass a Cucumber Scenario object to a TestNg configuration method. The AfterMethod will be called by TestNg and will not be able to inject the Scenario object. For a list of objects that are injected automatically refer to this - http://testng.org/doc/documentation-main.html#native-dependency-injection
Either use the After annotation of Cucumber and pass the Scenario object.
#cucumber.api.java.After
public void tearDown(Scenario scenario)
Or use the AfterMethod of TestNg and pass the ITestResult object.
#org.testng.annotations.AfterMethod
public void tearDown(ITestResult result)
I am working on a JavaFx application, there i have a script that extract a zip followed by some other operation like updating files etc.
I want to have a textArea that displays whats going on in background, like "Zip extracting...", "Updating xyz file" etc.
Till now i have tried following way:
MyTask<String> task;
task = new MyTask<String>() {
#Override
protected String call() throws Exception {
File path = new File(exportTo.getAbsolutePath());
updateMessage("Extracting modular app to target directory...");
patcher.unZip(appPath.getAbsolutePath(), path.getAbsolutePath());
if (path.exists()) {
AppInfo info = getAppInfo();
patcher.patchAndroid(info, resourceZip, new File(path.getAbsolutePath() + "/" + appPath.getName().substring(0, appPath.getName().lastIndexOf("."))), this);
showOkAlert("Build completed!");
} else {
showOkAlert("Modular app folder not found");
}
return "";
}
#Override
protected void updateProgress(double workDone, double max) {
patcher.reportLogs(message);
}
private String message;
#Override
public void updateMessage(final String message) {
Platform.runLater(() -> patcher.reportLogs(message));
this.message = message;
//updateProgress(0, 0);
}
};
task.run();
MyTask class
abstract class MyTask<T> extends Task<T> {
abstract public void updateMessage(String message);
}
I have tried using updateProgress method, Platform.runLater() but nothing is working.
All the message i printed in textArea are printed after all operation is done.
Please help.
As javadoc for Task states you need to manually create a Thread to execute your Task:
Thread th = new Thread(task);
th.start();
Currently your task is being run on Application UI thread and blocks UI updates.
I created an Interface class:
package userclasses;
import com.codename1.system.NativeInterface;
public interface NativeJ2MEInterface extends NativeInterface {
public void pollBackground();
}
This is the native class - after I edited it:
package userclasses;
import userclasses.StateMachine;
public class NativeJ2MEInterfaceImpl {
public void pollBackground() {
try {
Date now = new Date();
long timeToRun = now.getTime() + (1000 * 60 );
System.out.println("RUNNNNNNN forest runnn!");
PushRegistry.registerAlarm(StateMachine.class.getName(), timeToRun);
}
catch (Exception e) {
System.out.println("EXC-1:"+e.getMessage());
}
}
public boolean isSupported() {
return true;
}
}
I want to call the javax.microedition.io.PushRegistry registerAlarm method, but my Codename One J2ME build fails saying:
error: cannot find symbol
PushRegistry.registerAlarm(StateMachine.class.getName(), timeToRun);
I added a midp_2.1.jar to the native j2me directory, but it did not work.
How can I get this to work? Or how can I directly access j2me alarm API?
Don't add the jar, it will get packaged into the final build.
Try setting the build argument j2me.ashaNative=true.
I wanted to debug the Seed() method in my Entity Framework database configuration class when I run Update-Database from the Package Manager Console but didn't know how to do it. I wanted to share the solution with others in case they have the same issue.
Here is similar question with a solution that works really well.
It does NOT require Thread.Sleep.
Just Launches the debugger using this code.
Clipped from the answer
if (!System.Diagnostics.Debugger.IsAttached)
System.Diagnostics.Debugger.Launch();
The way I solved this was to open a new instance of Visual Studio and then open the same solution in this new instance of Visual Studio. I then attached the debugger in this new instance to the old instance (devenv.exe) while running the update-database command. This allowed me to debug the Seed method.
Just to make sure I didn't miss the breakpoint by not attaching in time I added a Thread.Sleep before the breakpoint.
I hope this helps someone.
If you need to get a specific variable's value, a quick hack is to throw an exception:
throw new Exception(variable);
A cleaner solution (I guess this requires EF 6) would IMHO be to call update-database from code:
var configuration = new DbMigrationsConfiguration<TContext>();
var databaseMigrator = new DbMigrator(configuration);
databaseMigrator.Update();
This allows you to debug the Seed method.
You may take this one step further and construct a unit test (or, more precisely, an integration test) that creates an empty test database, applies all EF migrations, runs the Seed method, and drops the test database again:
var configuration = new DbMigrationsConfiguration<TContext>();
Database.Delete("TestDatabaseNameOrConnectionString");
var databaseMigrator = new DbMigrator(configuration);
databaseMigrator.Update();
Database.Delete("TestDatabaseNameOrConnectionString");
But be careful not to run this against your development database!
I know this is an old question, but if all you want is messages, and you don't care to include references to WinForms in your project, I made some simple debug window where I can send Trace events.
For more serious and step-by-step debugging, I'll open another Visual Studio instance, but it's not necessary for simple stuff.
This is the whole code:
SeedApplicationContext.cs
using System;
using System.Data.Entity;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;
namespace Data.Persistence.Migrations.SeedDebug
{
public class SeedApplicationContext<T> : ApplicationContext
where T : DbContext
{
private class SeedTraceListener : TraceListener
{
private readonly SeedApplicationContext<T> _appContext;
public SeedTraceListener(SeedApplicationContext<T> appContext)
{
_appContext = appContext;
}
public override void Write(string message)
{
_appContext.WriteDebugText(message);
}
public override void WriteLine(string message)
{
_appContext.WriteDebugLine(message);
}
}
private Form _debugForm;
private TextBox _debugTextBox;
private TraceListener _traceListener;
private readonly Action<T> _seedAction;
private readonly T _dbcontext;
public Exception Exception { get; private set; }
public bool WaitBeforeExit { get; private set; }
public SeedApplicationContext(Action<T> seedAction, T dbcontext, bool waitBeforeExit = false)
{
_dbcontext = dbcontext;
_seedAction = seedAction;
WaitBeforeExit = waitBeforeExit;
_traceListener = new SeedTraceListener(this);
CreateDebugForm();
MainForm = _debugForm;
Trace.Listeners.Add(_traceListener);
}
private void CreateDebugForm()
{
var textbox = new TextBox {Multiline = true, Dock = DockStyle.Fill, ScrollBars = ScrollBars.Both, WordWrap = false};
var form = new Form {Font = new Font(#"Lucida Console", 8), Text = "Seed Trace"};
form.Controls.Add(tb);
form.Shown += OnFormShown;
_debugForm = form;
_debugTextBox = textbox;
}
private void OnFormShown(object sender, EventArgs eventArgs)
{
WriteDebugLine("Initializing seed...");
try
{
_seedAction(_dbcontext);
if(!WaitBeforeExit)
_debugForm.Close();
else
WriteDebugLine("Finished seed. Close this window to continue");
}
catch (Exception e)
{
Exception = e;
var einner = e;
while (einner != null)
{
WriteDebugLine(string.Format("[Exception {0}] {1}", einner.GetType(), einner.Message));
WriteDebugLine(einner.StackTrace);
einner = einner.InnerException;
if (einner != null)
WriteDebugLine("------- Inner Exception -------");
}
}
}
protected override void Dispose(bool disposing)
{
if (disposing && _traceListener != null)
{
Trace.Listeners.Remove(_traceListener);
_traceListener.Dispose();
_traceListener = null;
}
base.Dispose(disposing);
}
private void WriteDebugText(string message)
{
_debugTextBox.Text += message;
Application.DoEvents();
}
private void WriteDebugLine(string message)
{
WriteDebugText(message + Environment.NewLine);
}
}
}
And on your standard Configuration.cs
// ...
using System.Windows.Forms;
using Data.Persistence.Migrations.SeedDebug;
// ...
namespace Data.Persistence.Migrations
{
internal sealed class Configuration : DbMigrationsConfiguration<MyContext>
{
public Configuration()
{
// Migrations configuration here
}
protected override void Seed(MyContext context)
{
// Create our application context which will host our debug window and message loop
var appContext = new SeedApplicationContext<MyContext>(SeedInternal, context, false);
Application.Run(appContext);
var e = appContext.Exception;
Application.Exit();
// Rethrow the exception to the package manager console
if (e != null)
throw e;
}
// Our original Seed method, now with Trace support!
private void SeedInternal(MyContext context)
{
// ...
Trace.WriteLine("I'm seeding!")
// ...
}
}
}
Uh Debugging is one thing but don't forget to call:
context.Update()
Also don't wrap in try catch without a good inner exceptions spill to the console.
https://coderwall.com/p/fbcyaw/debug-into-entity-framework-code-first
with catch (DbEntityValidationException ex)
I have 2 workarounds (without Debugger.Launch() since it doesn't work for me):
To print message in Package Manager Console use exception:
throw new Exception("Your message");
Another way is to print message in file by creating a cmd process:
// Logs to file {solution folder}\seed.log data from Seed method (for DEBUG only)
private void Log(string msg)
{
string echoCmd = $"/C echo {DateTime.Now} - {msg} >> seed.log";
System.Diagnostics.Process.Start("cmd.exe", echoCmd);
}
# first I thought it wasn't firing, but saw this
So I waited and now I get Unhandled Exception: MonoTouch.Foundation.You_Should_Not_Call_base_In_This_Method: Exception of type 'MonoTouch.Foundation.You_Should_Not_Call_base_In_This_Method' was thrown. in the failed handler.
I have defined a CLLocationManager, here is FinishedLaunching & CLLocationManagerDelegate
public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
// If you have defined a view, add it here:
// window.AddSubview (navigationController.View);
_locationManager = new CLLocationManager();
_locationManager.Delegate = new LocationManagerDelegate(this);
_locationManager.StartUpdatingLocation();
window.MakeKeyAndVisible ();
return true;
}
private class LocationManagerDelegate : CLLocationManagerDelegate
{
private AppDelegate _appd;
public LocationManagerDelegate(AppDelegate appd)
{
_appd = appd;
Console.WriteLine("Delegate created");
}
public override void UpdatedLocation(CLLocationManager manager
, CLLocation newLocation, CLLocation oldLocation)
{
Console.WriteLine("Lat: " + newLocation.Coordinate.Latitude.ToString());
}
public override void Failed (CLLocationManager manager, NSError error)
{
//_appd.labelInfo.Text = "Failed to find location";
Console.WriteLine("Failed to find location");
base.Failed (manager, error);
}
}
I am using the latest monodevelop, monotouch, xcode and iphone SDK, just installed a coupla days ago. Any suggestions?
Regards
_Eric
The exception is saying you should not call base.Failed in the overridden "Failed" method.