javaw

Convert an UploadedFile into a File

℡╲_俬逩灬. 提交于 2019-12-05 02:09:03
I'm using PrimeFaces 3.2 and I should store a file on filesystem. Now, I know that the class FileUploaded creates a temp file so I would convert it into a real file using java.io.File. Here it is my code: String fileName = "D:/upload/file.zip"; //--- this is an example, in my real code it is dynamic UploadedFile uploadedFile; //--- getters and setters InputStream in = uploadedFile.getInputStream(); OutputStream out = new FileOutputStream(new File(fileName)); int read = 0; byte[] bytes = new byte[1024]; while ((read = in.read(bytes)) != -1) { out.write(bytes, 0, read); } in.close(); out.flush()

Eclipse “javaw.exe” High CPU usage

懵懂的女人 提交于 2019-12-04 07:37:58
I have standard Eclipse Kepler with CDT installed. Sometimes when it stays idle for a while the javaw.exe starts eating the CPU up to 30%. Nothing is running in Eclipse, no indexing, no library update, no building or compiling. How can I debug Eclipse to see if something is running in background? Does Eclipse have any console or log so I can see what exactly is being done? Not to mention, I even restarted the Eclipse but it just works for a few moment and then again reaches high CPU usage. What could be the problem? Windows 7 64bit Eclipse Kepler standard (plugins ADT & CDT) Java 7 You can try

Can I find out if the java program was launched using java or javaw

偶尔善良 提交于 2019-11-28 11:15:01
This is related to an earlier question by a different user, asking How to detect that code is running inside eclipse IDE . I noticed that Eclipse always launches programs with javaw rather than java . (This does not imply a program launched with javaw was launched from Eclipse). I can find the arguments passed using RuntimeMXBean RuntimemxBean = ManagementFactory.getRuntimeMXBean(); List<String> lst = RuntimemxBean.getInputArguments(); for (int i = 0; i < lst.size(); i++) System.out.println(lst.get(i)); But this does not tell me whether it was launched using java or javaw . Is there any way to

Start a java program without the console

不问归期 提交于 2019-11-27 17:57:43
I am trying to use this GUI mod for a Minecraft Server. I wrote a batch file so the server can start with more RAM. When I run just the .jar file, no command window opens and it runs just fine (of course with about 256mb ram) I was reading online that javaw starts a jar file without a command-line-console. But when I use javaw, the command console opens, but when I close it the program remains open. this is my batch file: @echo off "%ProgramFiles(x86)%\Java\jre6\bin\javaw.exe" -jar -Xms1024m -Xmx1024m crafty.jar @echo on I don't understand java as well as most, so please try to be as clear as

“Could not find the main class” when double-clicking .jar file

半城伤御伤魂 提交于 2019-11-27 11:48:28
First: I realize that this issue should be quite simple and lots of people seem to have experienced it. However, it appears my issue may be slightly different from existing posts. I'm using NetBeans to compile a Java application. When it's done building, the output goes into the dist\ folder correctly. The jar file is present there. If I go to the command line, navigate to that folder, and call the following: java -jar Prosperity.jar everything works fine. Obviously the name of the application is Prosperity. The following command also works fine: javaw -jar Prosperity.jar However, double

Can I find out if the java program was launched using java or javaw

不打扰是莪最后的温柔 提交于 2019-11-27 06:03:57
问题 This is related to an earlier question by a different user, asking How to detect that code is running inside eclipse IDE. I noticed that Eclipse always launches programs with javaw rather than java . (This does not imply a program launched with javaw was launched from Eclipse). I can find the arguments passed using RuntimeMXBean RuntimemxBean = ManagementFactory.getRuntimeMXBean(); List<String> lst = RuntimemxBean.getInputArguments(); for (int i = 0; i < lst.size(); i++) System.out.println

Find absolute java.exe path programmatically from java code

北城以北 提交于 2019-11-27 02:04:29
If I have a java jar or class file which is launched by the user (assuming java path is set in environment variables), so how can i from within the code, figure out absolute path of java.exe/javaw.exe from which this file is being launched. Like on ubuntu we can run: % which java and it shows the path. However on windows, if i check System.getenv() it may happen that there are multiple path's found e.g for old or new version. If through cmd line, I run java -version it does not show the path. Can you tell me either through pure java or command line on windows how is it possible to find out the

Start a java program without the console

送分小仙女□ 提交于 2019-11-26 19:11:09
问题 I am trying to use this GUI mod for a Minecraft Server. I wrote a batch file so the server can start with more RAM. When I run just the .jar file, no command window opens and it runs just fine (of course with about 256mb ram) I was reading online that javaw starts a jar file without a command-line-console. But when I use javaw, the command console opens, but when I close it the program remains open. this is my batch file: @echo off "%ProgramFiles(x86)%\Java\jre6\bin\javaw.exe" -jar -Xms1024m

Difference between java.exe and javaw.exe

蓝咒 提交于 2019-11-26 17:20:28
Recently I noted that some applications are running on javaw (not in java ). What is the difference between them and how can I run my Swing application on javaw ? java.exe is the command where it waits for application to complete untill it takes the next command. javaw.exe is the command which will not wait for the application to complete. you can go ahead with another commands. Chandra Patni java.exe is the console app while javaw.exe is windows app (console-less). You can't have Console with javaw.exe . The difference is in the subsystem that each executable targets. java.exe targets the

“Could not find the main class” when double-clicking .jar file

a 夏天 提交于 2019-11-26 15:46:36
问题 First: I realize that this issue should be quite simple and lots of people seem to have experienced it. However, it appears my issue may be slightly different from existing posts. I'm using NetBeans to compile a Java application. When it's done building, the output goes into the dist\ folder correctly. The jar file is present there. If I go to the command line, navigate to that folder, and call the following: java -jar Prosperity.jar everything works fine. Obviously the name of the