Source Code shows as rectangles instead of characters - eclipse

I've a very weird problem:
after upgrading from Ubuntu 10.10. to 11.04 (new installation), I have weird problems with the Eclipse editor.
When writing Java code (new Project was created) I type
System.out.println("bla")
and then "out" is shown as rectangles only. Weird is that for about half a second I see "System.out.println" and then the editor changes it to System.[][][].println (not really [] (here I used two brackets), it is shown as rectangles).
See the attached file for an example.
This is very weird. I've never had this before with any Ubuntu, Java or Eclipse version.
Currently, I use: Ubuntu 11.04. Eclipse 3.6 (latest download from June 7th) and Java 1.6.0_25.
Eclipse and Ubuntu Terminal is set to UTF-8.
The problem also happens when using KDE instead of Gnome.
Any ideas what could be wrong here and how to fix this?

You have syntax highlighting set, and the font or font style for whatever type "out" is classified as in your syntax highlighting (class variable?) cannot be found.

I've solved this problem :)
We should install those packages and restart computer...
sudo apt-get install ttf-mscorefonts-installer mplayer-fonts ttf-xfree86-nonfree xfs cabextract ttf-liberation ttf-mscorefonts-installer
sudo apt-get install ttf-larabie-straight ttf-larabie-deco xfonts-terminus-dos xfonts-terminus xfonts-terminus-oblique xfonts-mona tv-fonts ttf-tuffy ttf-sjfonts ttf-georgewilliams ttf-fifthhorseman-dkg-handwriting ttf-essays1743 ttf-opensymbol ttf-mgopen ttf-freefont ttf-dustin ttf-dejavu-extra ttf-dejavu-core ttf-dejavu ttf-bpg-georgian-fonts equivs ttf-sil-gentium gnome-specimen bsd-mailx dctrl-tools devscripts diffstat dput libapt-pkg-perl libauthen-sasl-perl libdevel-symdump-perl libio-pty-perl libio-stringy-perl libipc-run-perl libparse-debcontrol-perl libpod-coverage-perl libterm-size-perl libtest-pod-perl lintian patchutils postfix wdiff

Related

Cannot launch CDT: java.lang.ClassNotFoundException: org.eclipse.core.runtime.adaptor.EclipseStarter

I am trying to use Eclipse CDT under Ubuntu 18.04 LTS.
I get the same error as many others, but I could not find a solution in what I read.
I try to launch with
$ eclipse &
OpenJDK 64-Bit Server VM warning: Ignoring option MaxPermSize; support was removed in 8.0
and I get
/home/user1/.eclipse/org.eclipse.platform_3.8_155965261/configuration/1551271296090.log
When checking /usr/lib/eclipse/configuration/config.ini (as per this) I found the following lines (among others)
osgi.framework=file\:plugins/org.eclipse.osgi_3.8.1.dist.jar
osgi.bundles=reference\:file\:org.eclipse.equinox.simpleconfigurator_1.0.301.dist.jar#1\:start
org.eclipse.equinox.simpleconfigurator.configUrl=file\:org.eclipse.equinox.simpleconfigurator/bundles.info
As for the first two lines, I have files
$ locate eclipse.osgi_
/usr/share/java/org.eclipse.osgi_3.8.1.dist.jar
$ locate simpleconfigurator_1
/usr/lib/eclipse/plugins/org.eclipse.equinox.simpleconfigurator_1.0.301.dist.jar
Nevertheless:
/usr/share/java/org.eclipse.osgi_3.8.1.dist.jar seems to belong to no package (a remnant of some old package?), since
$ apt-file search /usr/share/java/org.eclipse.osgi_3.8.1.dist.jar
gives no results.
I have ver 3.9.1
$ dpkg -l | grep libequinox-osgi-java
ii libequinox-osgi-java 3.9.1-1 all Equinox OSGi framework
$ dpkg -L libequinox-osgi-java
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/libequinox-osgi-java
/usr/share/doc/libequinox-osgi-java/changelog.Debian.gz
/usr/share/doc/libequinox-osgi-java/copyright
/usr/share/java
/usr/share/java/org.eclipse.osgi-3.9.1.jar
/usr/share/maven-repo
/usr/share/maven-repo/org
/usr/share/maven-repo/org/eclipse
/usr/share/maven-repo/org/eclipse/osgi
/usr/share/maven-repo/org/eclipse/osgi/org.eclipse.osgi
/usr/share/maven-repo/org/eclipse/osgi/org.eclipse.osgi/3.9.1
/usr/share/maven-repo/org/eclipse/osgi/org.eclipse.osgi/3.9.1/org.eclipse.osgi-3.9.1.pom
/usr/share/maven-repo/org/eclipse/osgi/org.eclipse.osgi/debian
/usr/share/maven-repo/org/eclipse/osgi/org.eclipse.osgi/debian/org.eclipse.osgi-debian.pom
/usr/share/java/org.eclipse.osgi.jar
/usr/share/maven-repo/org/eclipse/osgi/org.eclipse.osgi/3.9.1/org.eclipse.osgi-3.9.1.jar
/usr/share/maven-repo/org/eclipse/osgi/org.eclipse.osgi/debian/org.eclipse.osgi-debian.jar
So I do not know if the problem is here.
How can I solve this?
Could not find an answer here
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=891956
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=898086
https://bugs.launchpad.net/ubuntu/+source/eclipse/+bug/1754886
https://ubuntu.pkgs.org/16.04/ubuntu-universe-i386/libequinox-osgi-java_3.8.1-8_all.deb.html
https://askubuntu.com/questions/1031171/eclipse-doesnt-start-on-ubuntu-18-04
You are probably using an older Eclipse version that does not work with Java 9 or higher:
If using Java 9 or newer please use Eclipse 4.7.1a or newer as it contains fixes in Eclipse launcher to add all JVM modules.
Do one of the following to solve the problem:
Use Java 8 to run Eclipse (a JRE/JDK can be put in the subfolder jre of your Eclipse installation or be specified in the eclipse.ini file)
Upgrade Eclipse (recommended).

Error in matcaffe installation

The above error showed up when I tried to install matcaffe in ubuntu. I switched to caffe root directory, and ran the following commands:
$ cd /home/naved/Desktop/caffe-master
$ make all matcaffe
$ make mattest
My matlab version is 2011a.
After running make mattest, the error above showed up.
What should I do to solve this problem?
I believe that the functionality for custom unit test caffe(and specifically the package matlab.unittest.TestCase) was introduced in version R2015a of MATLAB, and that if you're on an older version it won't be available

Why is this error showing when I try to use javaws?

When I try to use an application with the following command on Ubuntu:
javaws http://example.com.br/remote_example.jnlp
or simply type
javaws
The followin error shows up:
Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/lib/jvm/java-6-oracle/jre/lib/amd64/libdeploy.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
I've searched on Google, but didn't find the answer. I'm sure i'm using 64 bit Ubuntu with 64 bit 1.6 jdk, my coworkers are using the same set up but have no idea what this message is about.
The problem is the java 6 loading screen pops up but after that no signal of the application being opened.
I've installed execstack with apt-get and run execstack -c on the library, the message doesn't show up anymore, but the application still won't open.
Running this on the command line solved the problem:
update-alternatives --config javaws
And then selecting the 1.6 jdk instead of any other appearing there.
For some reason it was using the my java 8 jdk even though my $JAVA_HOME variable was set to jdk 1.6 path.

The JDK is missing and is required to run some NetBeans modules

Complete error message:
The JDK is missing and is required to run some NetBeans modules
Please use the --jdkhome command line option to specify a JDK installation or see http://wiki.netbeans.org/FaqRunningOnJre for more information.
Some details: I just installed Netbeans on Linux mint for the first time and when I start it when its turning on modules this error message appears. But I do have jdk installed.
$ java -version
java version "1.8.0_66"
Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)
$ javac -version
javac 1.8.0_66
Find the file [netbeans installation directory]/etc/netbeans.conf
Luckily, Linux has a find helper like
find /home/ -name "netbeans.conf,
in which you can change the /home/ to a location where you want to search.
I found it at /usr/local/netbeans-8.1/etc/netbeans.conf
Once, you found the file, the following property needs to be set:
netbeans_jdkhome="[jdk_path]"
where you can find the jdk_path using:
update-alternatives --config java
In my case, I found it at /opt/java/jdk1.8.0_191
[Solved] For Mac OSX 10.11 (El Capitan).
Solution may be similar for other Unix-based systems.
The problem may have occurred because I inadvertently installed the jre
prior to installing the jdk. I uninstalled the jre, installed the jdk
and reinstalled NetBeans but the problem (popup window) remained.
However, the fix was fairly simple.
1. Make sure NetBeans is not running.
2. Make sure the jdk is installed.
3. Determine the location of the jdk:
The jdk location can be determined by entering the following (in Terminal):
$ /usr/libexec/java_home
For my system, the output was:
/Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home
4. Edit the NetBeans configuration file to indicate the location of the jdk.
Near the bottom of this Netbeans configuration file (or equivalent for your NetBeans version):
/Applications/NetBeans/NetBeans 8.2.app/Contents/Resources/NetBeans/etc/netbeans.conf
Comment out the following line (insert a # before the first character):
#netbeans_jdkhome="/Applications/NetBeans/NetBeans 8.2.app/Contents/Resources/NetBeans/bin/jre"
Then, add the following line (or equivalent for your jdk version):
netbeans_jkdhome="/Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home"
Then, save and exit the editor.
5. Start NetBeans (no more popup window indicating that the jdk is missing).
When netbeans has problems trying to find the path of the jdk, it's mainly because the version of the jdk does not match. Open the file C:\Program Files\NetBeans 8.2\etc\netbeans.conf, and verify that netbeans_jdkhome = "C:\Program Files\Java\jdk1.8.0_111".
Open netbeans.conf
sudo nano "/usr/lib/jvm/java-8-oracle/netbeans.conf"
Set proper sdk path:
netbeans_jdkhome="/usr/lib/jvm/java-8-oracle"
Exit Ctrl + X and to save changes Ctrl + T
This error showed up when I updated the Mac to Mojave. To fix, I edited the netbeans.conf file with the current jdk by using Terminal to find the correct jdk. Type
/usr/libexec/java_home -V
Here was my output.
Matching Java Virtual Machines (4):
1.8.311.11 (x86_64) "Oracle Corporation" - "Java" /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
1.8.0_131 (x86_64) "Oracle Corporation" - "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home
1.8.0_25 (x86_64) "Oracle Corporation" - "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home
1.7.0_79 (x86_64) "Oracle Corporation" - "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home
/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
Entering the first jdk listed did not work.
I edited the conf file with the second one listed:
netbeans_jdkhome="/Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home"
Restarted Netbeans. That fixed it.
This worked for me
1. install full JDK
2. either edit <netbeans-IDE-installation>/etc/netbeans.conf
2.1 unmark netbeans_jdkhome
2.2 link to JDK location e.g. /usr/local/share/java/jdk1.6.0_07/
3. or use --jdkhome command-line option e.g. ./bin/netbeans --jdkhome /usr/local/share/java/jdk1.6.0_07/
take care with the "/" at the end
More info in http://wiki.netbeans.org/FaqRunningOnJre
Ubuntu 16.04 LTS:
Uninstall the netbeans you have.
Delete .cache/netbeans folder
Download http://www.oracle.com/technetwork/java/javase/downloads/jdk-netbeans-jsp-142931.html
Install your download
I have this problem to. But now i resolove this problem with edit one line.
Find and open this file /etc/netbeans.conf
If you see netbeans_jdkhome="C:\Program Files\Java\jre1.8.0_151" replace netbeans_jdkhome="C:\Program Files\Java\jdk1.8.0_131"
Save as adminstrator
Problem reseloved
In mid April 2019, Oracle has changed the JDK's licence. However, I was still able to solve this issue with NetBeans 11 and the JDK 12's open source build on my Windows machine. Just downloaded the open source JDK from https://jdk.java.net/ and extracted it. Then, in my NetBeans config file, I typed in the path to the extracted directory (NOT the "bin" folder!).
I resolved this problem by changing default version of JRE and JDK that I'm using to 11.x.x with following commands:
sudo update-alternatives --config java
sudo update-alternatives --config javac

GLIBC_2.7 not found

I am getting the following error when trying to run several executables:
/lib/libc.so.6: version `GLIBC_2.7' not found (required by .tools/bridge/bridge)
I have recently upgraded from CentOS 5.3 to 5.7 (I am required to run these tools on CentOS 5, so I can't upgrade to 6).
I recompiled the whole code but this error still appears.
Has anyone encountered this type of error?
Thanks,
Claudiu
The error means that you built .tools/bridge/bridge on a system with glibc-2.7 (or later), and are trying to run it on a system that has glibc-2.6 or earlier.
Linux (and most UNIXes) does not support "build on later, run on earlier"; only the reverse scenario is supported.
See also this answer.
The 'glibc' is not the latest version, and you can try to update glibc package.
yum install glibc
or
yum install glibc-2.7