I found a traffic light simulator called Green Light District
the file I download included and explanation of how to build the project
and it says the following
Extract the archive to a certain directory,
In that dir do javac gld/*.java
In that dir do java gld.GLDSim
I know * means all but...
first I want to know am I able to compile something like *.java
this is a link to the simulator , if some one can tell how to compile it , it would be really nice
http://sourceforge.net/projects/stoplicht/
The issue occurs due to the fact that "enum" became reserved word in Java 1.5+, so it can no longer be used as a name for variables/methods/classes, but GLD uses enum as a name for some variables.
Once the name is changed - project will compile.
Alternatively one can try to compile it with compiler setting source version 1.4 - this should probably also work, but I suggest to simply rename all variables named enum.
Basically, all the code is in the folder called gld. You need to compile all the .java files inside it. After that, you run the main class gld.GLDSim.
Had the same problem.
You should use Java 1.4, this simulator is quite old, hence uses an old version of Java and some preserved words in more advanced Java versions.
Related
Is IntelliJ compiling all the time since it tells me with red squiggly lines when there is an error? (in addition to the autocomplete features) Or is it doing some sort of psuedo compiling?
If it is doing legit compiling, where does it put these compiled classes? I'de like to point my JRebel to that directory instead of the individual module target folders.
Meo is right, from what I learned when I developed plugins for custom languages, IntelliJ does not compile anything until you explicitly make your project. While you are typing, its lexer/parser detects any invalid token or code construct. In the meantime, it maintains an index of every class and method in your project and its dependencies, along with their signature, etc.
After you stop typing, you'll see a little colored eye in the top part of the right gutter. It indicates that the IDE is running "annotators" and "code inspections". They are able to tell whether or not classes, methods and variable are valid based on the current index and the current state of your file (imports, declarations, etc.). The same goes for unused variables, invalid parameters in method calls, etc.
Pros:
annotators work directly on what they call a PSI tree, which is basically an enhanced AST representing your current file
it may be faster that compiling every time (it uses an index and does not need to recompile every dependent class)
annotators can detect things javac don't care about, such as potential bugs (e.g. using = instead of == in a while condition)
Cons:
that's a loooot of work, basically they need to rewrite the logic to find every error that javac can produce (which is why you can find many issues on their bugtracker labelled "good code is red" or "bad code is green", meaning there is a difference between what they detect and what the compiler would output)
TL;DR: it does not produce any .class until you make your project, everything is done "by hand"
For every module, the compiler output path can be found from Paths tab in Module Settings.
JRebel plugin generates rebel.xml automatically and derives the directory path from Module Settings, so you do not need to point to the locations manually - just generate rebel.xml using the IDE plugin: right click on module in the project view -> JRebel -> generate rebel.xml
Just to add, after compilation, the classes are stored in the target directory if it's a Maven project - otherwise, the directory is specified in IntelliJ's Project Structure, in "Project compiler output":
IntelliJ understands the code, it does not need to compile the code to know what is wrong.
I found my .class files by going to the out/production/main folders from the home directory of the project.
I have deploy my java code on AWS cloud, when I compile it on windows through terminal, I just have to use the command.
javac mainApp.java
it automatically create .class files of all other classes, lets say I have another class
class newProcessClass
who's variable is in mainApp.java, on EC2 when I compile it, it is giving me the error
error: could not find this symbol
newProcessClass npc = new newProcessClass();
same for the other classes. how can I compile it, and run it.
According to your description, I think that might be caused by classpath issue,
So please make sure current path(.) is under your classpath.
You can do this by type the follow into your terminal(pay attention to the little dot please!)
export CLASSPATH=.;$CLASSPATH
If you would like to persistent this setting and avoid set this everytime, you'd better add it to your .bashrc file.
And then when you run the class via java command, please also specify classpath as below
java -cp . mainApp
I recommend use Maven for the life cycle for application java and when you compiled the mainApp.java this action has that compile all file. you can get me more information of error stack?. For other side I think that is best that you use Maven. Best regards
I'm doing some basic java homework for a class on my new laptop - issue is, I can't seem to get the program to compile and run from my batch file using the directions the instructor gave me.
I've set the Path variable to my JDK inside the Environment Variables settings.
My program is a simple shipping program to keep track of shipment information - I have the program working flawlessly in NetBeans (which our instructor advised us to use for developing the code), but he's going to be testing them using batch files, so we're also advised to test them on our systems with one we create prior to turning them in - pretty straightforward.
Issue is, I cannot seem to get this to work. I've never done it before, but I've used .bat files to compile and run C++ programs, as well as using makefiles on a unix system, so I feel like I'm absolutely stupid for not figuring this out on my own, but none of my searches have returned any fruitful solutions that help at all.
My program consists of 3 .java files:
Shipment.java - an interface that contains abstracted methods that are implemented in the ShipmentHW1 class
ShipmentHW1.java - a class that implements the abstracted methods from Shipment and has constructors, etc to create a usable object
TestShipment.java - the main class of this program, which utilizes and creates ShipmentHW1 objects based on preset parameters. This is super duper basic stuff here, and again, it runs perfectly fine inside the NetBeans IDE.
The instructions given to us state to have the batch file inside the package directory (which in this case I've set aside a seperate folder on my desktop titled "shipping", which is the package name - shouldn't be any issues there), where the 3 .java files are located as well.
They say if you don't need to explicitly list the path to the JDK, then you can simply have
javac TestShipment.java
java TestShipment.java
pause
Afterwards I get errors talking about how it "cannot find symbol Shipment s = new ShipmentHW1();"
I've tried adding imports, but since they're in the same package it shouldn't even be an issue.
Directory path is
C:\Users\X\Desktop\shipping
All 7 files are contained within:
TestShipment.java
TestShipment.class
Shipment.java
Shipment.class
ShipmentHW1.java
ShipmentHW1.class
doHW1.bat
Does anyone have any idea? I can provide more information if I've been too vague
Also, I'm on Windows 8 if that makes any difference
Solved
Batch file now reads
javac TestShipment.java Shipment.java ShipmentHW1.java
cd ..
java shipment.TestShipment
pause
and it works like a charm. Anyone have any ideas why I had to call the package.class instead of just compiling it regularly?
Try doing
javac TestShipment.java
java TestShipment
pause
Without seeing the contents of TestShipment.java, I'll assume you have some dependency on the Shipment and ShipmentHW1 classes. As such, when you execute a program that uses the TestShipment class, you need to have the .class files for each of the three (and any other dependencies).
So you will have to compile Shipment.java and ShipmentHW1.java as well before running your java command. If they are in the same package, you're good, if not, you will have to specify an appropriate value for the -cp option.
When running java with a class name, you need to specify the fully qualified class name.
If your .java files are declared to be in the 'shipping' package, then you probably need to be running java from the parent directory of 'shipping', e.g.
cd <path>/shipping
javac TestShipment.java
cd ..
java shipping/TestShipment
We are developing a fairly large project and have many dependencies. Recently, we ran into an issue with a conflict between two of them, agileAPI.jar and axis.jar. Both are 3rd party libraries.
The code in question depends directly on agileAPI.jar. If I build it with just that in the build path, everything that depends on it works correctly.
As soon as I add axis.jar to the build path (just adding it, not writing code that depends on it), everything goes wrong. Some of the code that depended on the first library is now throwing exceptions from the 2nd library. It is as if the first library is picking and choosing methods to call from the 2nd library, instead of whereever it was calling them from prior.
I have code in the project that needs axis.jar directly, so I can't just remove it from the build path. I need to find a way to have these two exist in the same build path, but ignore each other.
It should be noted that both libraries coexisted prior to a recent upgrade with agile. I have been working with Oracle's support team to try and resolve this. After two weeks, though, I am looking for other sources of help.
Our environment is Windows and Eclipse, although in testing this, it also occurs when running java from a command line. Our JDK is 1.5.0_22.
Any help would be appreciated.
Thank you,
David
EDIT:
As requested, here are the stack traces that we see. The first stack trace is printed in the code beyond my control:
java.lang.NoSuchMethodError: org.apache.axis.description.OperationDesc.setStyle(Lorg/apache/axis/constants/Style;)V
at com.agile.webfs.components.fileserver.client.FileServerSoapBindingStub._initOperationDesc1(FileServerSoapBindingStub.java:37)
at com.agile.webfs.components.fileserver.client.FileServerSoapBindingStub.<clinit>(FileServerSoapBindingStub.java:20)
at com.agile.webfs.components.fileserver.client.FileServerWSServiceLocator.getFileServer(FileServerWSServiceLocator.java:43)
at com.agile.webfs.client.IFSLocator.getRemoteFileServer(IFSLocator.java:128)
at com.agile.webfs.client.IFSLocator.getConnection(IFSLocator.java:101)
at com.agile.api.pc.EJBLookup.createFileSession(EJBLookup.java:444)
at com.agile.api.pc.EJBLookup.getFileSession(EJBLookup.java:432)
at com.agile.api.pc.attachment.IFSOutputStream.getFileSession(IFSOutputStream.java:133)
at com.agile.api.pc.attachment.IFSOutputStream.copyFrom(IFSOutputStream.java:87)
at com.agile.api.pc.attachment.IFSOutputStream.copyFrom(IFSOutputStream.java:115)
at com.agile.api.pc.TableAttachment.uploadFile(TableAttachment.java:886)
at com.agile.api.pc.TableAttachment$AddFiles2Action.doSdkAction(TableAttachment.java:724)
at com.agile.api.common.SDKAction.run(SDKAction.java:23)
at com.agile.api.common.OracleAuthenticator.doAs(OracleAuthenticator.java:131)
at com.agile.api.common.Security.doAs(Security.java:54)
at com.agile.api.common.Security.doAs(Security.java:109)
at com.agile.api.pc.TableAttachment.addFiles2(TableAttachment.java:483)
at com.agile.api.pc.TableAttachment.createNewBlob2(TableAttachment.java:459)
at com.agile.api.pc.TableAttachment.doCreateServerRowWithParam(TableAttachment.java:363)
at com.agile.api.pc.Table.createTableRow(Table.java:238)
at com.agile.api.pc.TableAttachment.createTableRow(TableAttachment.java:169)
at com.agile.api.pc.Table.createRow(Table.java:202)
at com.[snip].updateAttachments(VaultImportService.java:3068)
at com.[snip].processIncorporatedFile(VaultImportService.java:926)
at com.[snip].processPdxFile(VaultImportService.java:532)
at com.[snip].processPdxRequest(VaultImportService.java:388)
at com.[snip].<init>(VaultImportService.java:299)
at com.[snip].main(VaultImportService.java:3660)
After the exception bubbles up and we catch it, the stacktrace that we print looks like:
at com.agile.api.pc.Session.createError(Session.java:1772)
at com.agile.api.pc.EJBLookup.createFileSession(EJBLookup.java:454)
at com.agile.api.pc.EJBLookup.getFileSession(EJBLookup.java:432)
at com.agile.api.pc.attachment.IFSOutputStream.getFileSession(IFSOutputStream.java:133)
at com.agile.api.pc.attachment.IFSOutputStream.copyFrom(IFSOutputStream.java:87)
at com.agile.api.pc.attachment.IFSOutputStream.copyFrom(IFSOutputStream.java:115)
at com.agile.api.pc.TableAttachment.uploadFile(TableAttachment.java:886)
at com.agile.api.pc.TableAttachment$AddFiles2Action.doSdkAction(TableAttachment.java:724)
at com.agile.api.common.SDKAction.run(SDKAction.java:23)
at com.agile.api.common.OracleAuthenticator.doAs(OracleAuthenticator.java:131)
at com.agile.api.common.Security.doAs(Security.java:54)
at com.agile.api.common.Security.doAs(Security.java:109)
at com.agile.api.pc.TableAttachment.addFiles2(TableAttachment.java:483)
at com.agile.api.pc.TableAttachment.createNewBlob2(TableAttachment.java:459)
at com.agile.api.pc.TableAttachment.doCreateServerRowWithParam(TableAttachment.java:363)
at com.agile.api.pc.Table.createTableRow(Table.java:238)
at com.agile.api.pc.TableAttachment.createTableRow(TableAttachment.java:169)
at com.agile.api.pc.Table.createRow(Table.java:202)
at com.[snip].updateAttachments(VaultImportService.java:3068)
at com.[snip].processIncorporatedFile(VaultImportService.java:926)
at com.[snip].processPdxFile(VaultImportService.java:532)
at com.[snip].processPdxRequest(VaultImportService.java:388)
at com.[snip].<init>(VaultImportService.java:299)
at com.[snip].main(VaultImportService.java:3660)
In both cases, the line "at com.agile.api.pc.Table.createRow(Table.java:202)" is the agileAPI call that I am making. I have removed our package structure, as it identifies the company that I work for. They value privacy and security.
I'd advise you to check these two things first:
Open the axis.jar file with some zip utility, like 7-Zip or WinRar. See if there's a folder called "services" in the META-INF folder in the jar. If there is, it's possible that the axis.jar file specifies implementations for specific interfaces that somehow don't interoperate with agileAPI. Also do the same for agileAPI.jar, since it might itself declare an interface implementation that axis doesn't like.
Open both agileAPI.jar and axis.jar with a zip utility, then check if there's packages with the same name. If there's none, it won't be a naming conflict. If there's one or more, open the corresponding folders and do the same check recursively. If you end up with at least one class with the same name in the same package across the two jars, it's probably a naming conflict.
That should catch the most obvious issues. If none of this is the case, we'll need to look deeper.
A way to solve such classpath issues is to use a module system such as OSGi or the NetBeans Platform module system where each module has its own classloader.
I have a text (.txt) file that contains Java code! I want to create a method that includes this Java code and then call that method through the program.
Can anybody suggest a way to do this?
let consider this example what it does actually load the source code, compile and execute the java code by simpler program by using JavaCompiler API.
Use the JavaCompiler. It can compile code from a String, so I'm sure it could handle code from a text file.
Do you think instead of putting it in the main method I can put it in for example test method and call method like this?
Put it wherever you like. E.G. see the STBC & especially the source code. It provides a GUI and can compile the code in the text area on button click.
this program need tools.jar but jre 7 doesnt have this!!
Did you try reading the documentation that is provided for the STBC? Notably:
System Requirements
STBC will run on any computer with a version 1.6+ Java Plug-In* JDK (AKA SDK).
(*) The API that STBC uses is merely a public interface to the compiler in the tools.jar that is distributed only with JDKs (though the 'public JRE' of the JDK also seems to acquire a tools.jar). This leads to some unusual requirements in running either the native jar, or the web start app.
Or shorter, no JRE will have a JavaCompiler, only JDKs have them.
Change the .txt file to a .java file,
add it to your java project
Compile the code
Execute the methods
Load the file in through standard java IO and then have Groovy evaluate it for you:
http://groovy.codehaus.org/Embedding+Groovy
it's something like quine:
http://www.nyx.org/%7Egthompso/quine.htm