I started to learn swing and downloaded netbeans to work through the tutorials. Unfortunately, when I create a JFrame design view hangs instead of loading and the Navigator and Inspector panes just show up empty.
System details:
Linux Mint Maya
Netbeans version 7.0.1
java 1.6.0_24
Any ideas would be greatly appreciated.
In whatever editor/designer you choose, consider the approach shown here, in which the top-level container is created manually and one or more content panels are maintained in the designer.
look in the Netbeans View menu and choose "IDE log"
There may be an error message / exception there, that might give you a clue.
Reinstalling the nb-javac plugin fixed this issue for me.
I followed the steps here and it resolved my problem.
For me, this was caused by a "FormGuardedBlockError", because at one point in my project I copied all of the source out into Notepad++ and used that to replace the .java file, thereby stripping all of the //GEN-BEGIN and related directives.
You can close NetBeans, open the .java file in a plaintext editor and put these directives back by hand, but it may be easier to merge with an earlier version of your code (if you have one).
For more details, check out http://wiki.netbeans.org/FormGuardedBlockError
Menu->view->show edit toolbar fixed this for me , of course the file you select to edit must have jframe, added to it I think for design tab to appear.
Go to Menu -> Option -> Select "Java" from option windows tool
then Active
Related
So I'm trying to add jar files to a java project.
I've been told the following:
If you want a more beginner-friendly way of adding libraries, you can
also use the Project Manager for Java extension, which is included in
the Java Extension Pack. With it, you can click the + icon on
Referenced Libraries in the JAVA PROJECTS view, as shown in this
example. A quick tip if you need to add many libraries from a folder
is to Shift or Alt + click the + icon, which will let you select an
entire folder containing multiple .jar files.
After installing Project manager extension and creating a new Java project in VS code, I get to this screen.
As mentioned by VS code, I should be able to see the project view tab after creating my java project. The issue is I don't see the project view tab as shown in the image above. VS code says I should see the 3 dots by the explorer subheading to enable it, but again, I don't have these 3 dots as shown in the first image.
I have both project manager and the extension pack installed, so I really don't understand why I cant see or enable project view.
Any suggestions on enabling project view?
Have you tried to open a java file? Because the extension activated depends on the opened filename extension.
You can refer to here.
If it still does not work, could you provide the OS and the versions of the
VSCode and extensions?
I have struggled quite a bit with this and none of the 'obvious' solutions worked.
The way I ended up solving the issue is by creating a new Java Project and looking at the difference in the config of the files.
Especially in the .project file, there were missing entries. Some also in the .settings/*.prefs files
After updating those in my own project, it got detected properly.
As for the 3 dots, here's what I think: different versions may be slightly different, you see, there are no three points in this one enter image description here. So you may update it when you are free.
As for the project view, you may have to open a project before it appears, Steven-MSFT has said it in detail, you can see it first. If you still have questions, you can provide some details again.
Anyway, you can try the following 2 steps:
open a .java file
reboot your vscode
I have the JD-eclipse-plugin installed. I want to decompile the classes within a jar-file. So I select the jar-file within Project-Explorer and click Decompiler in the Menu. However both decompilers (JAD and JD-core) are greyed out.
I also tried the steps shown in this blog on AVAJAVA Web Tutorials. I guess the blog is a bit outdated, however I can see within Windows-->Preferences-->Java-->Decompiler that Jad is correctly set up. But there is no JD-eclipse found within Preferences-->General-->Editors-->File Associations as you can see in the following image.. Now I right click the jar-file within Project-Explorer, but there is no such "Attach Source File".
Did I miss anything to set up the plugin?
EDIT: I´m using the following setup: Eclipse: Mars.1 Release (4.5.1); JadClipse 4.0.0; JDK 1.8
EDIT2: Forgot to mention that I use Tomcat and want to dive into the libraries from /WebContent/WEB-INF/lib. This is not working, I cannot further collapse the jar-files.
For Eclipse 2018-09 , the problem was related to " class without source
"
I had resolved this issue by going to:
Preferences
General
Editors
File Associations
Class without source
and setting decompliler viewer as default : see the following screen shot:
Obviously I mixed the actual JD-eclipse-plugin an a plugin called JadClipse for Eclipse which is a slightly different plugin from eclipse marketplace. Thus when I followed the installation instructions of JD-eclipse, I could set the options for the screenshot posted within the question. So I set JD-eclipse as default for both *.class-files with and those without source-code.
Second mistake I did was a pretty silly and obvious one, namely that I wanted to browse the jar-files from within WEB-INF-folder of my Tomcat instead of from within Java Resources. Thus I could not dive into the jar-files at all hindering me to get to the class-level and thus to decompile those classes contained within the jar.
I hope this helps anyone outside also having trouble with the plugin for eclipse.
I had the same problem but "class without source" did have decompliler viewer as default. So all I did was set class file viewer as default and then switched back and that fixed the issue.
I had to update all of my plugins. the Procyon decompiler has this symptom when running under java 11 or later.
I have downloaded the Mars MIPS Simulator .jar file, and I have downloaded the java jdk file from oracle. Whenever I open the jar file, the IDE is there, but everything is greyed-out. I can't even edit the text in the window. When you select "Execute", three cut off windows appear in the box below, one titled "Text Segment", one "Data Segment", and one "Labels". I am thinking it is a failed installation, but I have no idea what else to do. Thank you for any help!
Here is a screenshot:
http://i.imgur.com/8O30Hzh.png
Hey I had the same problem! Just use the toolbar on the top and click paste and the edit window should work. And after you hit assemble, go to settings->Show labels window. Hope it helps!
I can tell you this:
I don't think it's an installation issue. As you said, you installed the JDK and then run the program succesfully. An installation issue would be an unexpected error because of a missing dependency, or something similar.
As this is not a programming question, I don't think StackOverflow is the correct site. You may search in the StackExchange site for an adequate community.
However, try putting the cursor at the bottom of the cut off windows to see if you can modify the size of the container panel.
UPDATE
Seems like the problem is that you are not editing a file, that's why the majority of the buttons are disabled. Try creating a new file: click the first button in the toolbar, the white one. Also, the menu item "file" should give you an option to do it.
The autocomplete of eclipse is not working now and I searched for hours but I couldn't find an answer to solve it. I haven't used it for long time then the first thing after opening it was to install SWT and windows builder even though I had swing installed. What I mean is, it is may possibly be because of some conflict caused by swt and swing(I read something about a conflict but I don't if this is possible).
Strange thing is it doesn't show anything when I press ctrl+space but when I go Edit-> Content Assist -> Default(it says Ctrl+Space nearby it), it shows things needed to be shown/works as desired.
public class Dsada {
String sssss;
public Dsada(){
sss //pressing ctrl+space is not working,Edit->ContentAssist->Default works fine
}
}
The solution is not to tick/untick some stuff under Windows->Preferences->...->Content Assist-> Advanced. I checked if "ctrl+space" is hijacked by some other thing which is not and checked keyboard language which is English(Those are suggested in mkyong).
I read something about a bug but I couldn't understand. I tried to delete eclipse and re-install again but I guess some settings just stayed in the machine so that it didn't work.
This is recurring for me. I'm using Eclipse 2019-03 in Windows 10.
The steps below work for my case, and does not require a restart.
Window->Preferences->Java->Editor->Content Assist->Advanced
The following options are de-selected, and when I set them the autocomplete worked as before. No restart needed.
1. Java Non-Type Proposals
2. Java Proposals
3. Java Type Proposals
4. Java Proposals (Task-focused)
I don't know what's triggering this but it only happens after I've created a new project. Usually doesn't. It simply doesn't happen often enough for me to notice a pattern to follow up on more.
Clearly this problem occurs with a variety of causes, so review the other answers to see if they match your case.
The hot key combination ctrl+space might be conflict with other settings in system if you are using windows.
Try modify this combination like alt+/, i always use this one since the first time i knew eclipse. It works well.
Hope it works for you.
Window->Preferences->Java->Editor->Content Assist->Advanced
The following options have to be selected, then the autocomplete worked . No restart is required.
Java Proposals (must be selected, not sure the follows)
Java Non-Type Proposals
Java Type Proposals
Java Proposals (Task-focused)
I was facing the same issue. If you use OS X Eclipse Ctrl+Space shortcut can be interfering with OS X system's "Selecting previous input source" using Ctrl+Space shortcut as default.
It is necessary to
edit System Preferencies/Keyboard/Shortcuts/Input Source and uncheck the "Selecting previous input source" or change the shortcut on something else. Eclipse should work after that even without restart.
I faced hot key problem with use Ctrl+Space. I tried to fix the issue first by Windows->Preferences->...->Content Assist-> Advanced and selected
Select the proposal kinds contained in the 'default' content assist list:
Other Java Proposals,
List item
SWT Template Proposals
Template Proposals
Type Proposals
but didn't help.
Therefore, I tried another solution. There would be multiple languages on your computer which could be eating up your Ctrl command. To solve this Go to Control Panel -> Region and Language -> Keyboards and Languages (tab) and then Change Keyboards.
You’ll see a list of languages installed – remove any that you don’t want (click the language and then click the Remove button) until you only have the ones you want left. That fixed it for me, but you can also check the Advanced Key Settings tab to make sure that none of the keyboard short-cuts that are set include Ctrl-Space.
Once you’ve done that, Ctrl-Space should work nicely!!!!
I had the same Problem on Ubuntu 14.04. The problem for me was that ibus used Ctrl+Space as a shortcut. I solved it by starting the program ibus-setup and chaning the shortcut to something else than Ctrl+Space.
Go to Windows >> Preferences » Java » Editor » Content Assist. Then Check the Auto activation triggers for java, Add this in the text box .abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
Recently, I also faced this issue. When I install neon version eclipse.
By (1) deleting respective class, (2) restoring defaults appearance and (3) restarting eclipse, solved the problem for me.
Hope it will help someone.
Go to Preferences » Java » Editor » Content Assist » Advanced. Make sure Other Java Proposals is ticked/checked.
I checked windows has no conflict of ctrl+space (of eclipse autosuggestion) with windows.
This is mere configuration issue of eclipse. reinstallation would fix it.
Thanks.
I select all the parameters in Preferences -> Java -> Editor -> Content Assist -> Advanced.
It help me and resolve the my problem.
Cltr+space work using this step.
Saving my work and restarting Eclipse solved this for me. I hadn't shut down Eclipse in a while, maybe weeks.
I had the same problem (MacOS Monterey, Eclipse 06-2022). Turned out it works with pressed fn button.
For Mac user, you can try : Preferences -> Java > Editor > Content Assist and then :
tick the field "Enable auto activation"
in the field Auto activation trigger for Java, you can input the text alphabet ".abcdefghijklmnopqrstuvwxyz"
I have a problem with Eclipse Indigo regarding library source code. When I open a library class (e.g. from the JDK, but also from some other included libraries, such as Guava), either using the Open Type dialogue or simply through Ctrl+ click on the class name or some of its methods, once in a while (not always) something breaks.
Don't get me wrong, the source is always displayed without any problem (either JDK source shipped with the JDK itself or Guava source downloaded by Maven). What actually stops to work:
When I open the Quick Outline popup in that given class using Ctrl + O, the list of methods and fields displays normally, but when I click on any of them, Eclipse doesn't move the view on it as it should. Also Ctrl + clicking any of the methods or fields of that class in my code doesn't bring me directly to it, but simply at the top of the source file.
When I hover over that said class or its methods, no JavaDoc appears in the popup as you can see in the attached image. I am in the HashSet class, the source is clearly there, but it isn't displayed in the popup.
I found out that this can be fixed by opening the Outline View and briefly clicking through the class's methods and fields. After a few clicks, Eclipse catches on and starts to work correctly, but only for this one class, not for all which are broken in this way at the moment.
Has anybody met this kind of bug? Is it tracked at Eclipse Bugzilla? Thanks in advance for any advice.
For completeness, this is my configuration:
Windows 7 Professional x64
Oracle JDK 1.7 Update 2 32b
Eclipse Indigo for Java EE Developers 32b
your issue #2 may be resolved by following these steps :
Go to http://java.sun.com/j2se/1.5.0/download.jsp and choose to
download the JDK 5.0 Source Code.
For JDK 5.0, select Download(SCSL source).
Download JDK (SCSL) 5.0 (1.5.0). This will give you a file jdk-1_5_0-src.scsl.zip. You do not need to unzip this file; Eclipse likes it the way it is.
In Eclipse, go to Projects -> Properties -> Java Build Path -> Libraries and expand JRE System Library [jre 1.5.0], then rt.jar. Select Source attachment and click Edit...
Select the above zip file. and Finish by exiting the dialog boxes.
source
Hope this helps..
Sounds like wrong sources are attached to the libs inside Eclipse.
I had similar symptoms in a project where a class exist in both: inside a lib and in the project's src folder. Same canonical class name, but different implementations.
I would recommend to verify (or reinstall) your JDK-Installation and re-configurating it in Eclipse.
Hitting Ctrl+Shift+T and typing HashSet and taking a screenshot of that window may help here, too.
To answer my own question, I didn't find out how to solve the problem in Indigo, but updating to Juno fixed it.