Messed up java in my Ubuntu 12.04Cannot execute Java program: UnsupportedClassVersionErrorjava MainServer...
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Messed up java in my Ubuntu 12.04
Cannot execute Java program: UnsupportedClassVersionErrorjava MainServer gives java.lang.UnsupportedClassVersionError: Unsupported major.minor version 51.0Java Problem in configurationHow can I uninstall my current java and install sun java 1.6Oracle Java 7 on Linux PowerPCJavac package is missingInstalling JDK.rpm file using alienopenjdk 7 java freeze launchUnable to install Oracle Java JDKJDK11 on Ubuntu 18.04
I will start from the very beginning on how I made a Mess!!
I needed Java programming on my Ubuntu 12.04. so, I downloaded Net Beans setup from the site. When I tried to run the setup, I found that JDK is not installed. i Anyway, as I used to do in Windows,(I am a newbie in Ubuntu), I went to Oracle Java site, downloaded the rpm package.
Next, I found that rpm is by default not installed in Ubuntu, so I downloaded rpm too via terminal. When I tried to install jdk setup through rpm, It gave error for installing something named "alien".
Ok!! Now, I installed alien and finally, something happened to the rpm file. Then a message came "jdk1.70.deb generated". Whoa!!! I knew this extension, its an installer file for Ubuntu, I quickly went to the .deb file via nautilus, n doouble clicked it. My software centre showed that it's already installed. N he was right! I found the jdk folder in /usr/java. But still, javac wasnt running!!!
I wrote java -version and it showed that openjdk is being used n not my new setup.
I searched on net, n found this tutorial by webupd8. tried to do this too, changed the java folder as per the guide in site. But now, when I try to run the javac -version on terminal, it gives an error:
Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lang/Object
n now, even java -version gives the same error!
I was trying to find out, how to uninstall my newly installed java, but havent found anything. N now, java is not working even on my browsers!
Please help. n get me out of this mess!!! :( :(
12.04 java oracle
asked Aug 11 '13 at 5:02
Akshit AroraAkshit Arora
10614
bumped to the homepage by Community♦ 1 min ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
I will start from the very beginning on how I made a Mess!!
I needed Java programming on my Ubuntu 12.04. so, I downloaded Net Beans setup from the site. When I tried to run the setup, I found that JDK is not installed. i Anyway, as I used to do in Windows,(I am a newbie in Ubuntu), I went to Oracle Java site, downloaded the rpm package.
Next, I found that rpm is by default not installed in Ubuntu, so I downloaded rpm too via terminal. When I tried to install jdk setup through rpm, It gave error for installing something named "alien".
Ok!! Now, I installed alien and finally, something happened to the rpm file. Then a message came "jdk1.70.deb generated". Whoa!!! I knew this extension, its an installer file for Ubuntu, I quickly went to the .deb file via nautilus, n doouble clicked it. My software centre showed that it's already installed. N he was right! I found the jdk folder in /usr/java. But still, javac wasnt running!!!
I wrote java -version and it showed that openjdk is being used n not my new setup.
I searched on net, n found this tutorial by webupd8. tried to do this too, changed the java folder as per the guide in site. But now, when I try to run the javac -version on terminal, it gives an error:
Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lang/Object
n now, even java -version gives the same error!
I was trying to find out, how to uninstall my newly installed java, but havent found anything. N now, java is not working even on my browsers!
Please help. n get me out of this mess!!! :( :(
12.04 java oracle
asked Aug 11 '13 at 5:02
Akshit AroraAkshit Arora
10614
bumped to the homepage by Community♦ 1 min ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Ok, first of all, rewind your steps, and you should have read the warning Warning: JDK 7 is available as a developer preview release, so use it at your own risk.. Now, the last thing you did was changing the java directory, did you followed the next steps? "Install Update Java package created by Bruce Ingalls (packages available for Ubuntu 11.10, 11.04, 10.10 and 10.04):"?
– Braiam
Aug 11 '13 at 5:30
yes.. I did that too.. but it didnt helped. javac -version and java -version still gave the same errors
– Akshit Arora
Aug 11 '13 at 6:48
Then work backwards, if the thing say move from to, you move to from, if it's says install, you uninstall.
– Braiam
Aug 11 '13 at 7:04
add a comment |
I will start from the very beginning on how I made a Mess!!
I needed Java programming on my Ubuntu 12.04. so, I downloaded Net Beans setup from the site. When I tried to run the setup, I found that JDK is not installed. i Anyway, as I used to do in Windows,(I am a newbie in Ubuntu), I went to Oracle Java site, downloaded the rpm package.
Next, I found that rpm is by default not installed in Ubuntu, so I downloaded rpm too via terminal. When I tried to install jdk setup through rpm, It gave error for installing something named "alien".
Ok!! Now, I installed alien and finally, something happened to the rpm file. Then a message came "jdk1.70.deb generated". Whoa!!! I knew this extension, its an installer file for Ubuntu, I quickly went to the .deb file via nautilus, n doouble clicked it. My software centre showed that it's already installed. N he was right! I found the jdk folder in /usr/java. But still, javac wasnt running!!!
I wrote java -version and it showed that openjdk is being used n not my new setup.
I searched on net, n found this tutorial by webupd8. tried to do this too, changed the java folder as per the guide in site. But now, when I try to run the javac -version on terminal, it gives an error:
Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lang/Object
n now, even java -version gives the same error!
I was trying to find out, how to uninstall my newly installed java, but havent found anything. N now, java is not working even on my browsers!
Please help. n get me out of this mess!!! :( :(
12.04 java oracle
asked Aug 11 '13 at 5:02
Akshit AroraAkshit Arora
10614
I will start from the very beginning on how I made a Mess!!
I needed Java programming on my Ubuntu 12.04. so, I downloaded Net Beans setup from the site. When I tried to run the setup, I found that JDK is not installed. i Anyway, as I used to do in Windows,(I am a newbie in Ubuntu), I went to Oracle Java site, downloaded the rpm package.
Next, I found that rpm is by default not installed in Ubuntu, so I downloaded rpm too via terminal. When I tried to install jdk setup through rpm, It gave error for installing something named "alien".
Ok!! Now, I installed alien and finally, something happened to the rpm file. Then a message came "jdk1.70.deb generated". Whoa!!! I knew this extension, its an installer file for Ubuntu, I quickly went to the .deb file via nautilus, n doouble clicked it. My software centre showed that it's already installed. N he was right! I found the jdk folder in /usr/java. But still, javac wasnt running!!!
I wrote java -version and it showed that openjdk is being used n not my new setup.
I searched on net, n found this tutorial by webupd8. tried to do this too, changed the java folder as per the guide in site. But now, when I try to run the javac -version on terminal, it gives an error:
Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lang/Object
n now, even java -version gives the same error!
I was trying to find out, how to uninstall my newly installed java, but havent found anything. N now, java is not working even on my browsers!
Please help. n get me out of this mess!!! :( :(
12.04 java oracle
12.04 java oracle
asked Aug 11 '13 at 5:02
Akshit AroraAkshit Arora
10614
asked Aug 11 '13 at 5:02
Akshit AroraAkshit Arora
10614
asked Aug 11 '13 at 5:02
Akshit AroraAkshit Arora
10614
asked Aug 11 '13 at 5:02
Akshit AroraAkshit Arora
10614
asked Aug 11 '13 at 5:02
Akshit AroraAkshit Arora
10614
10614
bumped to the homepage by Community♦ 1 min ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 1 min ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Ok, first of all, rewind your steps, and you should have read the warning Warning: JDK 7 is available as a developer preview release, so use it at your own risk.. Now, the last thing you did was changing the java directory, did you followed the next steps? "Install Update Java package created by Bruce Ingalls (packages available for Ubuntu 11.10, 11.04, 10.10 and 10.04):"?
– Braiam
Aug 11 '13 at 5:30
yes.. I did that too.. but it didnt helped. javac -version and java -version still gave the same errors
– Akshit Arora
Aug 11 '13 at 6:48
Then work backwards, if the thing say move from to, you move to from, if it's says install, you uninstall.
– Braiam
Aug 11 '13 at 7:04
add a comment |
Ok, first of all, rewind your steps, and you should have read the warning Warning: JDK 7 is available as a developer preview release, so use it at your own risk.. Now, the last thing you did was changing the java directory, did you followed the next steps? "Install Update Java package created by Bruce Ingalls (packages available for Ubuntu 11.10, 11.04, 10.10 and 10.04):"?
– Braiam
Aug 11 '13 at 5:30
yes.. I did that too.. but it didnt helped. javac -version and java -version still gave the same errors
– Akshit Arora
Aug 11 '13 at 6:48
Then work backwards, if the thing say move from to, you move to from, if it's says install, you uninstall.
– Braiam
Aug 11 '13 at 7:04
Ok, first of all, rewind your steps, and you should have read the warning Warning: JDK 7 is available as a developer preview release, so use it at your own risk.. Now, the last thing you did was changing the java directory, did you followed the next steps? "Install Update Java package created by Bruce Ingalls (packages available for Ubuntu 11.10, 11.04, 10.10 and 10.04):"?
– Braiam
Aug 11 '13 at 5:30
Ok, first of all, rewind your steps, and you should have read the warning Warning: JDK 7 is available as a developer preview release, so use it at your own risk.. Now, the last thing you did was changing the java directory, did you followed the next steps? "Install Update Java package created by Bruce Ingalls (packages available for Ubuntu 11.10, 11.04, 10.10 and 10.04):"?
– Braiam
Aug 11 '13 at 5:30
yes.. I did that too.. but it didnt helped. javac -version and java -version still gave the same errors
– Akshit Arora
Aug 11 '13 at 6:48
yes.. I did that too.. but it didnt helped. javac -version and java -version still gave the same errors
– Akshit Arora
Aug 11 '13 at 6:48
Then work backwards, if the thing say move from to, you move to from, if it's says install, you uninstall.
– Braiam
Aug 11 '13 at 7:04
Then work backwards, if the thing say move from to, you move to from, if it's says install, you uninstall.
– Braiam
Aug 11 '13 at 7:04
add a comment |
1 Answer
1
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oldest
votes
This is a better howto for getting Oracle Java7 installed on Ubuntu: http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html
answered Nov 1 '13 at 0:27
David PurdueDavid Purdue
1,937714
add a comment |
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This is a better howto for getting Oracle Java7 installed on Ubuntu: http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html
answered Nov 1 '13 at 0:27
David PurdueDavid Purdue
1,937714
add a comment |
This is a better howto for getting Oracle Java7 installed on Ubuntu: http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html
answered Nov 1 '13 at 0:27
David PurdueDavid Purdue
1,937714
add a comment |
This is a better howto for getting Oracle Java7 installed on Ubuntu: http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html
answered Nov 1 '13 at 0:27
David PurdueDavid Purdue
1,937714
This is a better howto for getting Oracle Java7 installed on Ubuntu: http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html
answered Nov 1 '13 at 0:27
David PurdueDavid Purdue
1,937714
answered Nov 1 '13 at 0:27
David PurdueDavid Purdue
1,937714
answered Nov 1 '13 at 0:27
David PurdueDavid Purdue
1,937714
answered Nov 1 '13 at 0:27
David PurdueDavid Purdue
1,937714
1,937714
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Ok, first of all, rewind your steps, and you should have read the warning Warning: JDK 7 is available as a developer preview release, so use it at your own risk.. Now, the last thing you did was changing the java directory, did you followed the next steps? "Install Update Java package created by Bruce Ingalls (packages available for Ubuntu 11.10, 11.04, 10.10 and 10.04):"?
– Braiam
Aug 11 '13 at 5:30
yes.. I did that too.. but it didnt helped. javac -version and java -version still gave the same errors
– Akshit Arora
Aug 11 '13 at 6:48
Then work backwards, if the thing say move from to, you move to from, if it's says install, you uninstall.
– Braiam
Aug 11 '13 at 7:04