Using Ant to compile simple Hello World program in Java, and something isn't working right. I know the Java code is correct, as it runs using javac. Something is wrong with my Any config file, and I can't quite figure out what it is. http://pastebin.com/q50L5b0D
and the command line errors I'm getting:
**Exception in thread "main" java.lang.NoClassDefFoundError: Proj0/class
Caused by: java.lang.ClassNotFoundException: Proj0.class
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: Proj0.class. Program will exit.
**
It just tell you the class Proj0 could not be found when trying to run your application using the ANT target you defined. Are you sure this line is correct ?
<property name="Proj0.class" value="package.names.Proj0"/>
The package.names.Proj0 is a strange name for a package, maybe you wanted something like using the actual value of a property called package.names?
For your javac task need to set the classpath , srcdir properly. As Vincent wrote you are missing the Proj0 class. Please look here for how to set the javac task.
Related
I am trying to run a code with multiple Java class files and a jar file which is from a library I downloaded. I compiled them with the following:
javac -cp "quickfixj-all-.jar" BTCCMarketDataRequest.java Bot.java
The Bot class has the main method and the BTCCMarketDataRequest file has a bunch of other methods in the class. I am not creating any packages.
How should I run it though?
If I do:
java Bot
I get the following output:
Exception in thread "main" java.lang.NoClassDefFoundError: quickfix/Group
at Bot.main(Bot.java:4)
Caused by: java.lang.ClassNotFoundException: quickfix.Group
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
... 1 more
The compiled class (the one in the jar file could not be found, but why? I compiled it.
I am new to Java so I have no idea what's going on.
Thank you!
You need to add the classpath while executing the program as well.
java -cp .:quickfixj-all-.jar Bot
This assumes that the Bot class is in the default package and all the jar and .class dependencies are in the same directory.
I am running a test case using java & fitnesse...
while Clicking on the "Test" button from below image,
It showing error as follows:
Standard Error:
Exception in thread "main" java.lang.NoClassDefFoundError: ":build/classes://////var/www/git/vodaware/java/Build:/root/leadout-tests///////var/www/git/vodaware/java/supportLibs/mockito-all-1/9/5/jar:/root/leadout-tests///////var/www/git/vodaware/java/supportLibs/jsp-api/jar:/root/leadout-tests///////var/www/git/vodaware/java/supportLibs/testng-6/8/7/jar:/root/leadout-tests///////var/www/git/vodaware/java/supportLibs/servlet-api/jar:/root/leadout-tests///////var/www/git/vodaware/java/supportLibs/jcip-annotations-1/0/jar
Caused by: java.lang.ClassNotFoundException: ":build.classes:......var.www.git.vodaware.java.Build:.root.leadout-tests.......var.www.git.vodaware.java.supportLibs.mockito-all-1.9.5.jar:.root.leadout-tests.......var.www.git.vodaware.java.supportLibs.jsp-api.jar:.root.leadout-tests.......var.www.git.vodaware.java.supportLibs.testng-6.8.7.jar:.root.leadout-tests.......var.www.git.vodaware.java.supportLibs.servlet-api.jar:.root.leadout-tests.......var.www.git.vodaware.java.supportLibs.jcip-annotations-1.0.jar
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
Could not find the main class: ":build/classes:../../var/www/git/vodaware.java/Build:/root/leadout-tests/../../var/www/git/vodaware.java/supportLibs/mockito-all-1.9.5.jar:/root/leadout-tests/../../var/www/git/vodaware.java/supportLibs/jsp-api.jar:/root/leadout-tests/../../var/www/git/vodaware.java/supportLibs/testng-6.8.7.jar:/root/leadout-tests/../../var/www/git/vodaware.java/supportLibs/servlet-api.jar:/root/leadout-tests/../../var/www/git/vodaware.java/supportLibs/jcip-annotations-1.0.jar. Program will exit.
What is the cause of this logs? Please anyone help me.
As the error says, the program is not able to find the java class. You need to make sure the
class path is set properly and also make sure the package location is set properly.
Ex:
classpath: foo/bar/
package: jane/doe.class
See to it that you mention the package hierarchy properly while setting it in the fitnesse column.
Hope this helps.
I am trying to run this command on linux... compilation is successfull but while running it gives error.
Executing this command:
java -cp .:/smash/same/hope/ant-launcher-1.6.1.jar src.vp
output
Setting the value for property-debug
Fusion Repository/asd/file/repo
Logs Directory
Running validations
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/tools/ant/Project
at src.vp.call(vp.java:114)
at src.vp.main(vp.java:172)
Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.Project
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:332)
... 2 more
Can some one help me to solve it...
You've included the ant-launcher jar file, but that doesn't contain the whole of ant, I'm sure. Look for the ant jar file that includes the Project class. (I'd expect it to be ant-1.6.1.jar based on the other file you've specified.)
my program is in package pl.edu.uj.tcs.crazySocket; due to some requirements. I work in the crazySocket directory. In order to compile the program I use command
CLASSPATH=~/prog/colosseum/data javac tictactoe.java
and that succeeds. I want to run the program. I change javac to java and get rid of the '.java'. I get
Exception in thread "main" java.lang.NoClassDefFoundError: tictactoe
Caused by: java.lang.ClassNotFoundException: tictactoe
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
when I get up in the tree directory to the ~/prog/colosseum/data and run java pl/edu/uj/tcs/crazySocket/tictactoe all works fine.
What's wrong with the CLASSPATH? Shouldn't it work both with javac and java?
There's nothing wrong with your classpath, it's your call to java that's wrong.
You need to specify the full qualified class name pl.edu.uj.tcs.crazySocket.tictactoe.
I have been trying for what seems like two days now to get my java application to compile from the command line in Ubuntu. I know I have Java installed because I can run my applications in Eclipse & Netbeans and they work fine. But if I want to compile my applications from the command line I get the following error message:
javac Main.java
Everythings fine, no errors or anything. Then I try:
java Main
And I get this error message:
Exception in thread "main" java.lang.NoClassDefFoundError: Main (wrong name: input/Main)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:637)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:336)
Could not find the main class: Main. Program will exit.
Try:
java input.Main
By the looks of your error, your Main class is in package "input". You need to specify package name when running a class, not the filename.
Open terminal and paste this command:
export CLASSPATH=.:/usr/local/tomcat/common/lib/jsp-api.jar:/usr/local/tomcat/common/lib/servlet-api.jar:/home/trenog/javokapi/bin/xmlrpc.jar
This looks like a classic Classpath problem. Eclipse and Netbeans will set up the classpath for you, but when you're writing to the command line, you're on your own.
Assuming you're using BASH, try typing the following into the command line:
CLASSPATH=/path/to/your/java/class/file
Or, alternately, you can do this from the java command line:
java -cp /path/to/your/java/class/file Main
Follow this link for more info.
EDIT: Well, I see you figured it out. Congrats.
The classloader simply can't find the class input.Main.
The class should be located in the directory ./input, the file inside that directory should be called Main.class and the java command should be 'java input.Main'.