JAR (Java Archive) file contains a collection of packages and classes. It is used to distribute packages and classes. Jar file is created using JAR.EXE, which is found in BIN directory of JDK. For example the following command creates a jar file with the name srikanth.jar and contains all .class files in the current directory. jar cvf srikanth.jar . To use classes of a jar file one has to keep jar file in CLASSPATH.

You can configure maven-compiler-plugin to exclude your unwanted packages or files to be compiled in the first place. But you will not be able to prevent javac to compile those files if they are referenced by other packages within the source tree. To prevent that, you will need to use antrun plugin ( or write your own custom plugin), bind it to compile phase, and remove unwanted classes in ${project.build.directory}/classes. See similar questions...

Optionally, add -Xmx<#>M to increase megabytes of memory available to Java (i.e., <JRE Path>/bin/java -Xmx512M -jar GIDBClient.jar) See similar questions...

executable jar file is the one with a manifest file specifying which class is to start when user executes it (double clicks it in explorer) or invokes with -jar flag of java ( java -jar test.jar). Assume we have First.class and Second.class to be placed in a jar file test.jar. We want First.class to start execution when user runs test.jar. Create a manifest file with the name test.mf as follows: Main-Class: First Note, we should not mention the .class extesion for the file in Manifest file. See similar questions...

Solution: If your program is an applet compressed in a JAR file, there is only one change you need to make. Normally when you run an applet, your html file would have the following: <applet code=TheApplet.class width=200 height=200> </applet> For a JAR file, you simply have to add an additional archive parameter: <applet code=TheApplet.class archive="applets/TheApplet. See similar questions...

A Jar file has the same format as a zip file. However, WinZip(7.0) does not open Jar files when you double click on the Jar file in the Window Explorer. Instead, you must open WinZip and then either drop the Jar file on WinZip's title bar or you need to use WinZip's File menu. See similar questions...

The quickest way to do this is get the WinZip program. Open up the jar file with WinZip. Locate the files in the meta-inf directory and delete all the signature files. The signature files are basically all the files in the meta-inf directory except the manifest.mf file. They will have extentions of .dsa and .sf. See similar questions...

class Test { public static void main (String args[]) { System.out.println("Loaded Test from:" + Test.class.getProtectionDomain().getCodeSource().getLocation()); } } The above code doesn't work because, by default all floating point constants in Java are treated as double, the float variable f cannot take a double value. The remedy is to convert it using type casting ( (float)10.50) or declare variable f as double. See similar questions...

The best way to do this is to use the method Class.getResourceAsStream() which will give you an input stream from which you can read the text file in the JAR. This technique can be used to get parameter info from a text file for an applet. See www.uq.net.au/~zzcmumme for an example. See similar questions...

keytool -keystore my.keystore -storepass tmaj123 -genkey -alias tmaj -keypass tmaj123 -dname "cn=John Smith, ou=DeMarzo Lab, o=Johns Hopkins University, st=MD, c=US" For additional security, you should leave out the -keypass myPassword option and allow the program to prompt you for it. One source of confusion is 2 passwords in the keystore. Here is the difference. The keystore is actually a collection of keys. It may have one or more keys. See similar questions...

Author: John Zukowski (http://www.jguru.com/guru/viewbio.jsp?EID=7) The Communicator 4.x browsers do not implement the Class.getResource(), ClassLoader.getResource(), and ClassLoader.getSystemResource() methods. You need to use the Class.getResourceAsStream(), ClassLoader.getResourceAsStream(), or ClassLoader.getSystemResourceAsStream() methods instead, respectively. See http://developer.netscape.com/docs/technote/java/getresource/getresource.html for more information. See similar questions...

In an EclipseME project, as part of the project build process, any Java files that are in your source folders are automatically compiled, while all non-Java files that are in your source folders are automatically copied into the build. This is standard Eclipse behavior. Bring up the Project Properties dialog. This may be done either by right-clicking on the project and selecting Properties or by using the Project / Properties menu item. See similar questions...

Yes. Applications can be deployed without packaging in an EAR, WAR, or JAR file by specifying the path to the directory structure containing the application instead of specifying the full path to the packaged deployment file. The directory being used must match the directory structure required as per the application component you are deploying. See similar questions...

The Beans.instantiate() method needs to be passed the proper classloader. Just passing in null is not sufficient for an applet. For instance, if your class... See similar questions...

String imageFileName = "foo.jpg" URL imageURL = getClass().getResource(imageFileName); Toolkit tk = Toolkit.getDefaultToolkit(); Image img = null; try { java.awt.image.ImageProducer I_P; I_P = (java.awt.image.ImageProducer)imageURL.getContent(); img = tk.createImage(I_P); Or equivalently, and possibly simpler, this: String imageFileName = "foo.jpg"; InputStream jpgStream = getClass().getResourceAsStream(imageFileName); Toolkit tk = Toolkit. See similar questions...

These products are not recommended for canning; choose recipes that you can freeze. In fact, most of these products are not really "canned." The directions call for baking in the jar and then closing with a canning lid. Many recipes for quick breads and cakes are low-acid and have the potential for supporting the growth of a bacteria like Clostridium botulinum if it is present inside the closed jar. One university's research showed a high potential for problems. See similar questions...

Often people think that they can save money by buying larger containers of canned food, transferring the contents (or leftovers from the first use) to smaller jars and re-processing it. Others wonder if this is a way to save leftovers from any size can for a longer time than they will keep in the refrigerator. We have no safe tested processes to do this. See similar questions...

In industrial facilities, radioactive substances are available that some people have used to expose old glass in an effort to change its color. Since the radiation in these substances can be especially potent, the change in color may be astonishingly deep. Usually these jars are either dark purple or kind of a sickly dark brown color depending on what chemical originally was used to clarify the glass. See similar questions...

Author: John Zukowski (http://www.jguru.com/guru/viewbio.jsp?EID=7) Question originally posed by krishna murthy kommalapati (http://www.jguru.com/guru/viewbio.jsp?EID=52207 To specify an that an applet loads from a JAR file, instead of from separate classes, add an ARCHIVE attribute to your <APPLET> tag: <APPLET CODE=AppletClass ARCHIVE="foo.jar" WIDTH=200 HEIGHT=200> </APPLET> If you need to specify multiple JAR files, provide a comma separated list. See similar questions...

Beginning in release 0.9.4 of EclipseME, it is necessary to check the "export" box on the Order and Exports tab of the Java Build Path item in the project properties for an included JAR to be deployed. Similarly, the resources in a dependent project that are to be deployed must also be exported. See Adding JAR Files to a MIDlet Suite for more discussion on this. See similar questions...