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Connect Java to a MySQL database
(14 answers)
Closed 4 years ago.
I'm getting an error at runtime saying that: could not load com.mysql.jdbc.driver
But when I'm setting the classpath then at run time I'm getting an error as could not load main class even though I had set up path in advance setting.
What should I do?
I had this problem recently and had to add the mysql-connector-java-8.0.11.jar to my library. https://mvnrepository.com/artifact/mysql/mysql-connector-java/8.0.11 If you're using maven you can just add it in or else download the jar file.
com.mysql.jdbc.Driver with a capital D. Also Class.forName no longer is needed; the jdbc:mysql: URL suffices.
Related
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How do I resolve ClassNotFoundException?
(28 answers)
Closed 3 years ago.
There are quite a lot similar questions regarding Eclipse exception: java.lang.ClassNotFoundException, but none of them seems work in my case.
The exception is raised during running my java program from Eclipse, with output message like this: "Caused by: java.lang.ClassNotFoundException: com.alibaba.fastjson.JSON".
I have added fastjson-1.2.62.jar in project->properties->java build path->Libraries->Classpath, so the program can build sucessfully.
How can I make the program find the fastjson library at runtime ?
Try this - under properties click "Run/Debug Settings" - pick/click the launch config you're using, and click the edit button. A window to Edit Launch Config Properties should be there.
Check the settings for Classpath.
I'm guessing that your required jar file isn't on the list there.
(Though I'm puzzled why it isn't - possibly other editing prior to this problem?)
Please let me know if this helps (or not). Cheers!
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Could not get resource 'http://...firebase-measurement-connector-impl-17.0.5-javadoc.jar
(3 answers)
Closed 4 years ago.
I was trying to built my android application, but build failed because of this error:
org.gradle.api.resources.ResourceException: Could not get resource 'https://dl.google.com/dl/android/maven2/com/google/firebase/firebase-measurement-connector-impl/17.0.5/firebase-measurement-connector-impl-17.0.5-javadoc.jar'.
Any support to fix this will be really appreciated.
fixed it by upgrading the Gradle distribution to 5.x. Go to gradle-wrapper.properties and update:
distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-all.zip
This question might be a duplicate of:
Could not get resource 'http://...firebase-measurement-connector-impl-17.0.5-javadoc.jar
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Access restriction on class due to restriction on required library rt.jar?
(15 answers)
Closed 8 years ago.
I am making a new Java project in eclipse. The only problem is that I didn't even get five lines in before I got an error that reads:
Access Restriction: The type JFrame is not accessible due to restriction on
required library C:\Program Files\Java\jre8\lib\rt.jar
How do I fix this issue? Please forgive me if someone already asked a similar question. I am still a beginner.
Try removing and readding the Java System Library to your project:
Project Properties -> Build Path -> Libraries -> Remove , and then Add Library -> JRE System Library
Try closing and reopening the Dialog after removing the the Library
This question already has an answer here:
Jira Rest Java Client: missing ApacheHttpClientConfig from Jersey
(1 answer)
Closed 8 years ago.
When i use library(com.sun.jersey.client.apache.config.DefaultApacheHttpClientConfig or another ) returns status 500 with massage
"java.lang.NoClassDefFoundError:
com/sun/jersey/client/apache/config/DefaultApacheHttpClientConfig...",
which means that program don't see this library at runtime(program is a jira plugin which runs on localhost). How i can add this library dynamically to runtime, cause when i build classes at my PC its OK. I tried to configure pom.xml and atlassian-plugin.xml files.
Download the jersey-apache-client.jar with all the dependencies and add it to your classpath.
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Breakpoints in JRE System Library in Eclipse
(3 answers)
Closed 8 years ago.
I have set a break point inside the java.util.ReentrantLock code to understand the functionality in eclipse. However i am getting the following error
"Unable to install breakpoint in java.util.concurrent.locks.ReentrantLock" due to missing line number attributes. Modify compiler options to generate line number attributes.
How to proceed on this ?
Update the build path of the project to use a JDK instead of JRE.
JREs do not include debug information