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CLASSPATH The CLASSPATHenvironment variable tells the Java Virtual Machine and other Java applications (for example, the Java tools located in the jdk1.1.x/bin directory) where to find the class libraries, including user-defined class libraries.
SYNOPSISThe CLASSPATH environment variable is set with the setenvcommand. Using setenv at the command line changes the current value of CLASSPATH. You can also use setenv in your startup file to specify a CLASSPATH at startup. The format is: setenv CLASSPATH path1:path2 ... where a path to a .zip or .jar file must terminate with the filename, and a path to a .class file must terminate with the directory name. The Java interpreter will search the paths for a class by name and load the first one it finds. DESCRIPTIONThe CLASSPATH tells the Java Virtual Machine and other Java applications and tools where to find the class libraries. The class libraries that the CLASSPATH points to may be the JDK classes (contained in the classes.zip file in the lib directory) and/or any classes that you want to use. Default CLASSPATH settingIf you followed the default JDK installation procedure, you probably do not need to set CLASSPATH because the shell scripts automatically append the following to the current CLASSPATH: .:[bin]/../classes:[bin]/../lib/classes.zip In this expression, [bin] is the absolute path to the jdk1.1.x/bin directory. Therefore, if you keep the bin and lib directories at the same directory level, the Java executables will find the JDK classes (contained in the classes.zip file). Note that the default CLASSPATH also includes a path to a classes directory on the same directory level as bin and lib. You can put your own (unzipped) class files in a classes directory that you create, and the Java executables will be able to find them with the default CLASSPATH.You should also be aware that some third-party applications that use the Java Virtual Machine may modify your CLASSPATH environment variable.Setting CLASSPATHYou need to set the CLASSPATH if you move the JDK's classes.zip file or if you want to load a class library that's not in a location specified by the default CLASSPATH. To set CLASSPATH, use the setenv command.
Classes can be saved either in individual class files, such as MyClass.class, or in groups in a file such as classes.zip or classes.jar. When specifying a path to a .zip or .jar file, you must end the path with the filename. When specifying a path to .class files, that path should end with the directory containing the .class files. For example, if you have class files in the directory /home/MyClasses, you could set the CLASSPATH with the following: setenv CLASSPATH /home/MyClasses If you also wanted to include the path /home/OtherClasses, you could use the command: setenv CLASSPATH /home/MyClasses:/home/OtherClasses Note that the two paths are separated by a colon.
The order in which you specify multiple directories in the CLASSPATH variable is important. The Java interpreter will look for classes in the directories in the order they appear in the CLASSPATH variable. In the example above, the Java interpreter will first look for a needed class in the directory /home/MyClasses. Only if it doesn't find a class with the proper name in that directory will the interpreter look in the /home/OtherClasses directory.
If you want to use a class library that is in a zipped file, you must include the name of that file in the CLASSPATH, for example: setenv CLASSPATH /home/MyClasses/myclasses.zip
If you want the CLASSPATH to point to class files that belong to a package, you should specify a path name that includes the path to the directory one level above the directory having the name of your package. For example, suppose you want the Java interpreter to be able to find classes in the package mypackage. If the path to the mypackage directory is /home/MyClasses/mypackage, you would set the CLASSPATH variable as follows: setenv CLASSPATH /home/MyClasses Unsetting CLASSPATHIf your CLASSPATH environment variable has been set to a value that is not correct, or if your startup file or script is setting an incorrect path, you can unset CLASSPATH by using: unsetenv CLASSPATH This command unsets only CLASSPATH's current value. You should also delete or modify the lines in your startup file that may be setting an incorrect CLASSPATH.The Java Runtime Environment (JRE) and CLASSPATHThe wrappers that invoke the Java Runtime Environment (JRE) unset the CLASSPATH variable before starting the Java interpreter. The reason is simple: there might be several Java applications installed on the machine. If you or someone else previously installed a Java development tool that modified the .cshrc or .login script, then CLASSPATH may point at a JDK1.0.2-based Java runtime. If such a CLASSPATH were left intact when the Java interpreter is invoked, then it will be loading 1.0.2 classes. If your app relies on 1.1 features, it will fail. Just as bad, it's unlikely that the classes for your app will even be found in that CLASSPATH. Unsetting CLASSPATH before invoking the JRE interpreter sanitizes your application against unpredictable results.
The default CLASSPATH used by the JRE is: [jre_path]/lib/rt.jar:[jre_path]/lib/i18n.jar:[jre_path]/lib/classes.jar:[jre_path]/lib/classes.zip:[jre_path]/classes where [jre_path] is the absolute path of the jre1.1.x directory (it has bin and lib directories underneath it). The files rt.jar and i18n.jar are used to hold the runtime's (required) core classes and (optional) internationalization classes. While you can store the classes specific to your application in either [jre_path]/lib/classes.jar or as individual class files in the [jre_path]/classessubdirectory, it is better to keep the JRE separate from your application and use CLASSPATH to point the interpreter to your application's class files.Using both JDK 1.0.2 and JDK 1.1.xIf you want to develop in both JDK 1.0.2 and JDK 1.1.x, you must set CLASSPATH separately for each one. To use both JDKs simultaneously, you can run them from separate shell windows each having its own value for CLASSPATH. If you are running only one at a time, you can write a batch script to switch the value of CLASSPATH as appropriate.The Java tools' -classpath optionSome of the Java tools such as java, javac, and javah have a -classpath option which can be used to override the path or paths specified by the CLASSPATH environment variable.
What else can I help you with?
Write a note on the model of management in Indian socio political environment?
answer
What is the difference between a static variable a global variable and a local variable?
A static variable is a variable allocated in static storage. A local variable is a variable declared inside a function. A global variable is a variable declared outside of any class or function. Note that local variables and global variables can both be allocated in static storage.
How do you talk to a shy girl in your class while I'm shy as well?
Write her a note
How can you declare global and local variable in pseudocode?
A local variable is a variable declared inside a construct, such as a class or function, while a global variable is a variable declared outside of any construct.
How can you tell when you to improve your note taking skills?
You're never sure what to write down. You don't know what to write down in class.
How can you tell when you need to improve you note-taking skills?
you dont know what to write down in class
How can you tell when you need to improve your note-taking skills?
You're never sure what to write down. You don't know what to write down in class.
Can you use this operator to refer static variable?
No. A static member variable is local to the class in which it is declared (much like a global, but scoped to the class) and is accessible to all instances of the class. Since it does not belong to any one instance of the class, it cannot be accessed via the this pointer, as you can with non-static members. Implicitly accessing the variable is the same as explicitly accessing it via ::.Note that it is possible to access a static member variable from outside the class by providing an accessor (getter) for it within the class. The accessor should be static as well, but needn't be, but it should return by value, otherwise it is no better than a global.
How to break up with a guy?
Write them in a note before you leave class, work or anything else you too met at.
How do you access private variable in flex?
In Flex, you access a private variable by calling it from within that class. Remember, the "private" modifier means it cannot be directly accessed outside of the class you declare it in (note I say "directly accessed" you can indirectly access it via public functions which I will show below). Example: declare your variable at the top of your class like this: private var myVariable:String; Then, inside one of your functions of that class, you can access the variable and/or assign it this way: public function changeMyVariable(value:String):void { // sets the private variable to a custom string myVariable="test String"; trace("myVariable is set to "+myVariable); // sets the private variable to the argument passed in myVariable = value; trace("myVariable is now set to" +myVariable); }
How do you write a note on environment?
Start by addressing the importance of protecting the environment and the various ways in which we can contribute to its preservation. Include statistics or examples to emphasize the current state of the environment and encourage action. Conclude with a call to action for readers to make small changes in their daily lives to help protect the environment.
Write a short note on inscription?
write a short note on inscriptions
