I have completely borked Java

[DrMacintosh]

Hello, just started taking Java classes and I've been trying to get a basic IDE installed. I finally found one that looks halfway decent, but when I try to run even a basic Hello world program, I get a massive string of errors. 

 

Here is what it says:

objc[3074]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/bin/java (0x105b294c0) and /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/jre/lib/libinstrument.dylib (0x105b9f4e0). One of the two will be used. Which one is undefined.
Exception in Application start method
java.lang.reflect.InvocationTargetException
	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.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
	at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
	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 sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
	at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
	at java.lang.Thread.run(Thread.java:745)
Caused by: javafx.fxml.LoadException: 
/Users/ericmelendez/Desktop/out/production/Desktop/sample/sample.fxml:7

	at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
	at javafx.fxml.FXMLLoader.access$700(FXMLLoader.java:103)
	at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:922)
	at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:971)
	at javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:220)
	at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:744)
	at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2707)
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
	at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
	at sample.Main.start(Main.java:13)
	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
	at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
	at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
Caused by: java.lang.ClassNotFoundException: sample.Controller
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:920)
	... 19 more
Exception running application sample.Main

Process finished with exit code 1

 

 

at this point I have no idea if removing my operating system of this garbage is even possible. I have a Time Machine backup from prior to me just trying to make a basic Hello World program. Would that just be easier? 

[TheKDub]

Try Eclipse.

 

What's the hello world code that you've got?

 

Could be broken/bad code, could be that you need to reinstall Java.

[DrMacintosh]

3 minutes ago, TheKDub said:

Try Eclipse.

 

What's the hello world code that you've got?

 

Could be broken/bad code, could be that you need to reinstall Java.

I even verified with generic templet code. The code is perfect.

class Solution {
  public static void main(String args[]) {
    System.out.println("Hello World!");
  }
}

But everything about Java on my Mac seems to be completely broken. I've tried all the IDEs out there, including Eclipse. The farthest I got was with IntelliJ

[Neftex]

when creating the project did you select console application?

 

you should link the tutorial/materials youre using and maybe a screenshot of the ide with code

[Froody129]

I use Netbeans and it works okay. I have concluded Java is trash as a language though. The syntax to me isn't logical, coming from Python, and it's hard to find a good IDE, they all feel tacked together  

[TheKDub]

1 hour ago, DrMacintosh said:

I even verified with generic templet code. The code is perfect.

class Solution {
  public static void main(String args[]) {
    System.out.println("Hello World!");
  }
}

But everything about Java on my Mac seems to be completely broken. I've tried all the IDEs out there, including Eclipse. The farthest I got was with IntelliJ

Must be a wack Java install then. I'd try reinstalling it.

[DrMacintosh]

1 minute ago, TheKDub said:

Must be a wack Java install then. I'd try reinstalling it.

That’s what I tried and I actually managed to get the program to print the line correctly. (though not without the non-error that the program has built in)

 

Thankfully the Java uninstall process through Terminal was rather thorough. 

[wasab]

You are doing more than just hello world. I see javafx and fxml loader on there which shouldn't be there if you are merely printing out hello world. 

[Franck]

1 hour ago, wasab said:

You are doing more than just hello world. I see javafx and fxml loader on there which shouldn't be there if you are merely printing out hello world. 

^--- he's right Eric, you shouldn't have the fx errors showing. Could also be an issue with the environment paths but that's usually all you have to config to use java on any computers.

[Kleine IJsbeer]

16 hours ago, DrMacintosh said:

I even verified with generic templet code. The code is perfect.

class Solution {
  public static void main(String args[]) {
    System.out.println("Hello World!");
  }
}

But everything about Java on my Mac seems to be completely broken. I've tried all the IDEs out there, including Eclipse. The farthest I got was with IntelliJ

Nothing is perfect but I'd say it's functional as it does in fact work:

Spoiler

I'd suggest trying javac [filename.java] in terminal from the folder in which your program is located and running it with java [filename] (no extension like .java or .class) to make sure the java installation works correctly. Because as you might've guessed you don't really need an IDE to make a program in Java, but it makes things a whole lot easier due to having debug tools and it runs the comandline stuff for you

 

1 hour ago, Franck said:

Could also be an issue with the environment paths but that's usually all you have to config to use java on any computers.

I think something like this is in fact the case due to the top line of the error message:

Quote

objc[3074]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/bin/java (0x105b294c0) and /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/jre/lib/libinstrument.dylib (0x105b9f4e0). One of the two will be used. Which one is undefined.

It's about not knowing which path should be used, dunno how this stuff is setup on a mac so wouldn't know how to help much further 

 

 

16 hours ago, Froody129 said:

I use Netbeans and it works okay. I have concluded Java is trash as a language though. The syntax to me isn't logical, coming from Python, and it's hard to find a good IDE, they all feel tacked together  

Java isn't trash for the reasons you give here, it's syntax is similar to C which is (next to java) one of the most used language types there are. It's rather not great because it's ran in a virtual machine which is running in your OS making it not directly aces resources and therefor slower and less flexible than something like C or C++ which are compiled to binary files to run directly on the hardware instead of in the VM. 

[wasab]

18 hours ago, Froody129 said:

I use Netbeans and it works okay. I have concluded Java is trash as a language though. The syntax to me isn't logical, coming from Python, and it's hard to find a good IDE, they all feel tacked together  

Java isnt a trash language but netbeans is a trash IDE and really makes java development a pain in the ass. 

[Mason Fraser]

I'm just checking in here, I know it's a little while down the road, did you ever get your IDE working? I recommend IntelliJ and I may be able to help with your JDK.

[Addvilz]

Let me guess, you are trying to write a desktop application, right?

 

To do things in Java, you only need two things:

1. IntelliJ - fetch the community version from Jetbrains
2. JDK - fetch OpenJ9 from https://adoptopenjdk.net

From there on, create new project (whatever kind you want), point the JDK setting of IntelliJ to Openj9 installation and that should be it.

 

It might be also that your code is somehow broken. Without source of what you are actually doing it's kind of hard to tell what exactly broke there.

[JohnAbrams]

Which IDE did you install?

I've been using IntellijIDEA Community Edition for a long time now and have never had such issues.

[wasab]

This thread is necro...