Exception: java.io.IOException - /theme.res not found

[balakrishna501]

SourceChangeWatcher running. Watching directories [D:\UberEatsClone-master\common\src\main\java]
[EDT] 0:0:0,17 - Codename One revisions: 7dd4e7d08b3442d90959477ee52a5ae8c4361b29

[EDT] 0:0:0,17 - Exception: java.io.IOException - /theme.res not found
java.io.IOException: /theme.res not found
at com.codename1.ui.util.Resources.open(Resources.java:756)
at com.codename1.ui.util.Resources.openLayered(Resources.java:720)
at com.codename1.ui.util.Resources.openLayered(Resources.java:684)
at com.codename1.demos.grub.Grub.init(Grub.java:243)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.codename1.impl.javase.Executor$4$1.run(Executor.java:308)
at com.codename1.ui.Display.processSerialCalls(Display.java:1368)
at com.codename1.ui.Display.mainEDTLoop(Display.java:1155)
at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)
at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)
java.lang.NullPointerException
at com.codename1.demos.grub.views.AccountView.(AccountView.java:89)
at com.codename1.demos.grub.controllers.AccountController.(AccountController.java:49)
at com.codename1.demos.grub.Grub.actionPerformed(Grub.java:90)
at com.codename1.demos.grub.Grub.actionPerformed(Grub.java:48)
at com.codename1.ui.util.EventDispatcher.fireActionEvent(EventDispatcher.java:349)
at com.codename1.rad.controllers.Controller.dispatchEvent(Controller.java:159)
at com.codename1.demos.grub.Grub.start(Grub.java:287)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.codename1.impl.javase.Executor$4$1.run(Executor.java:314)
at com.codename1.ui.Display.processSerialCalls(Display.java:1368)
at com.codename1.ui.Display.mainEDTLoop(Display.java:1155)
at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)
at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)

[balakrishna501]

i have just checkout code and run mvn install

im getting above error,plz help on this..i have wasted 2 days on this error

[danielsxavier]

Same issue here. I tried on linux and windows.

[shai-almog]

Make sure you're using JDK 11 to compile the project.
Alternatively you can use a newer JDK but would need to update the maven pom to the latest version.

[danielsxavier]

Thanks @shai-almog ! I changed to jdk 11 and works like a charm.