Java Platform, Standard Edition Wikipedia. Java Platform, Standard Edition or Java SE is a computing platform for development and deployment of portable code for desktop and server environments. Java SE was formerly known as Java 2 Platform, Standard Edition or J2. SE. The platform uses Java programming language and is part of the Java software platform family. Java SE defines a range of general purpose APIssuch as Java APIs for the Java Class Libraryand also includes the Java Language Specification and the Java Virtual Machine Specification. One of the most well knowncitation needed implementations of Java SE is Oracle Corporations Java Development Kit JDK. Nomenclature, standards and specificationseditThe platform was known as Java 2 Platform, Standard Edition or J2. SE from version 1. Java Platform, Standard Edition or Java SE in version 1. The SE is used to distinguish the base platform from the Enterprise Edition Java EE and Micro Edition Java ME platforms. The 2 was originally intended to emphasize the major changes introduced in version 1. The naming convention has been changed several times over the Java version history. Starting with J2. User Defined Exception In Java Program' title='User Defined Exception In Java Program' />Can anyone help me to find out what can be the issue with this program. In the onCreate method the findViewById returns null for all ids and this causes a null. Picocli is a onefile framework for creating Java command line applications with almost zero code. Supports a variety of command line syntax styles including POSIX. Enter-a-number.gif' alt='User Defined Exception In Java Program' title='User Defined Exception In Java Program' />SE 1. Merlin, Java SE has been developed under the Java Community Process, which produces descriptions of proposed and final specifications for the Java platform called Java Specification Requests JSR. JSR 5. J2. SE 1. 4 and JSR 1. J2. SE 5. 0 Tiger. Java SE 6 Mustang was released under JSR 2. Java Platform, Enterprise Edition Java EE is a related specification that includes all the classes in Java SE, plus a number that are more useful to programs that run on servers as opposed to workstations. Java Platform, Micro Edition Java ME is a related specification intended to provide a certified collection of Java APIs for the development of software for small, resource constrained devices such as cell phones, PDAs and set top boxes. The Java Runtime Environment JRE and Java Development Kit JDK are the actual files downloaded and installed on a computer to run or develop Java programs, respectively. General purpose packageseditjava. The Java packagejava. This includes the root classes that form the class hierarchy, types tied to the language definition, basic exceptions, math functions, threading, security functions, as well as some information on the underlying native system. This package contains 2. Error classes provided in JDK 6. The main classes and interfaces in java. Object the class that is the root of every class hierarchy. Enum the base class for enumeration classes as of J2. SE 5. 0. Class the class that is the root of the Java reflection system. Throwable the class that is the base class of the exception class hierarchy. Error, Exception, and Runtime. Exception the base classes for each exception type. Thread the class that allows operations on threads. String the class for strings and string literals. String. Buffer and String. Builder classes for performing string manipulation String. Builder as of J2. SE 5. 0. Comparable the interface that allows generic comparison and ordering of objects as of J2. SE 1. 2. Iterable the interface that allows generic iteration using the enhanced for loop as of J2. SE 5. 0. Class. Loader, Process, Runtime, Security. Manager, and System classes that provide system operations that manage the dynamic loading of classes, creation of external processes, host environment inquiries such as the time of day, and enforcement of security policies. Math and Strict. Math classes that provide basic math functions such as sine, cosine, and square root Strict. Math as of J2. SE 1. The primitive wrapper classes that encapsulateprimitive types as objects. The basic exception classes thrown for language level and other common exceptions. Classes in java. lang are automatically imported into every source file. The java. lang. ref package provides more flexible types of references than are otherwise available, permitting limited interaction between the application and the Java Virtual Machine JVM garbage collector. It is an important package, central enough to the language for the language designers to give it a name that starts with java. This package was added in J2. SE 1. 2. Java has an expressive system of references and allows for special behavior for garbage collection. A normal reference in Java is known as a strong reference. The java. Each type of reference is designed for a specific use. A Soft. Reference can be used to implement a cache. An object that is not reachable by a strong reference that is, not strongly reachable, but is referenced by a soft reference is called softly reachable. A softly reachable object may be garbage collected at the discretion of the garbage collector. This generally means that softly reachable objects are only garbage collected when free memory is lowbut again, this is at the garbage collectors discretion. Semantically, a soft reference means, Keep this object when nothing else references it, unless the memory is needed. A Weak. Reference is used to implement weak maps. An object that is not strongly or softly reachable, but is referenced by a weak reference is called weakly reachable. A weakly reachable object is garbage collected in the next collection cycle. This behavior is used in the class java. Weak. Hash. Map. A weak map allows the programmer to put keyvalue pairs in the map and not worry about the objects taking up memory when the key is no longer reachable anywhere else. Another possible application of weak references is the string intern pool. Semantically, a weak reference means get rid of this object when nothing else references it at the next garbage collection. A Phantom. Reference is used to reference objects that have been marked for garbage collection and have been finalized, but have not yet been reclaimed. An object that is not strongly, softly or weakly reachable, but is referenced by a phantom reference is called phantom reachable. This allows for more flexible cleanup than is possible with the finalization mechanism alone. Semantically, a phantom reference means this object is no longer needed and has been finalized in preparation for being collected. Each of these reference types extends the Reference class, which provides the getmethod to return a strong reference to the referent object or null if the reference has been cleared or if the reference type is phantom, and the clear method to clear the reference. The java. lang. ref also defines the class Reference. Queue, which can be used in each of the applications discussed above to keep track of objects that have changed reference type. When a Reference is created it is optionally registered with a reference queue. The application polls the reference queue to get references that have changed reachability state. Reflection is a constituent of the Java API that lets Java code examine and reflect on Java components at runtime and use the reflected members. Classes in the java. Class and java. lang. Package accommodate applications such as debuggers, interpreters, object inspectors, class browsers, and services such as object serialization and Java. Beans that need access to either the public members of a target object based on its runtime class or the members declared by a given class. This package was added in JDK 1. Component Reference. Test Plan. The Test Plan is where the overall settings for a test are specified. Static variables can be defined for values that are repeated throughout a test, such as server names. For example the variable SERVER could be defined as www. SERVER. This simplifies changing the name later. If the same variable name is reused on one of more. User Defined Variables Configuration elements. Such variables should be used for items that may change between test runs. Note that the Test Plan cannot refer to variables it defines. If you need to construct other variables from the Test Plan variables. User Defined Variables test element. Selecting Functional Testing instructs JMeter to save the additional sample information. Response Data and Sampler Data to all result files. This increases the resources needed to run a test, and may adversely impact JMeter performance. If more data is required for a particular sampler only, then add a Listener to it, and configure the fields as required. The option does not affect CSV result files, which cannot currently store such information. Also, an option exists here to instruct JMeter to run the Thread Group serially rather than in parallel. Run tear. Down Thread Groups after shutdown of main threads. Down groups if any will be run after graceful shutdown of the main threads. The tear. Down threads wont be run if the test is forcibly stopped. Test plan now provides an easy way to add classpath setting to a specific test plan. The feature is additive, meaning that you can add jar files or directories. JMeter. Note that this cannot be used to add JMeter GUI plugins, because they are processed earlier. However it can be useful for utility jars such as JDBC drivers. The jars are only added to. JMeter loader, not for the system class loader. JMeter properties also provides an entry for loading additional classpaths. In jmeter. properties, edit user. See JMeters Classpath and. Configuring JMeter for details. Thread GroupA Thread Group defines a pool of users that will execute a particular test case against your server. In the Thread Group GUI, you can control the number of users simulated number of threads, the ramp up time how long it takes to start all the threads, the number of times to perform the test, and optionally, a start and stop time for the test. See also tear. Down Thread Group and set. Up Thread Group. When using the scheduler, JMeter runs the thread group until either the number of loops is reached or the durationend time is reached whichever occurs first. Note that the condition is only checked between samples when the end condition is reached, that thread will stop. JMeter does not interrupt samplers which are waiting for a response, so the end time may be delayed arbitrarily. Since JMeter 3. 0, you can run a selection of Thread Group by selecting them and right clicking. A popup menu will appear. Popup menu to start a selection of Thread Groups. Notice you have 3 options to run the selection of Thread Groups. Start Start the selected thread groups only. Start no pauses Start the selected thread groups only but without running the timers. Validate Start the selected thread groups only using validation mode. Per default this runs the Thread Group in validation mode see belowValidation Mode. This mode enables rapid validation of a Thread Group by running it with 1 thread, 1 iteration, no timers and no Startup delay set to 0. Behaviour can be modified with some properties by setting in user. Number of threads to use to validate a Thread Group, by default 1testplanvalidation. Ignore timers when validating the thread group of plan, by default 1testplanvalidation. Number of iterations to use to validate a Thread Grouptestplanvalidation. Wether to force Throughput Controller in percentage mode to run as if percentage was 1. Defaults to false. Parameters. Attribute. Description. Required. Name. Descriptive name for this element that is shown in the tree. Action to be taken after a Sampler error. Determines what happens if a sampler error occurs, either because the sample itself failed or an assertion failed. The possible choices are. Bowers Wilkins Asw610 Manual. Continue ignore the error and continue with the test. Start Next Loop ignore the error, start next loop and continue with the test. Stop Thread current thread exits. Stop Test the entire test is stopped at the end of any current samples. Stop Test Now the entire test is stopped abruptly. Any current samplers are interrupted if possible. Number of Threads. Number of users to simulate. Yes. Ramp up Period. How long JMeter should take to get all the threads started. If there are 1. 0 threads and a ramp up time of 1. Yes. Loop Count. Number of times to perform the test case. Alternatively, forever can be selected causing the test to run until manually stopped. Yes, unless forever is selected. Delay Thread creation until needed. If selected, threads are created only when the appropriate proportion of the ramp up time has elapsed. This is most appropriate for tests with a ramp up time that is significantly longer than the time to execute a single thread. I. e. where earlier threads finish before later ones start. If not selected, all threads are created when the test starts they then pause for the appropriate proportion of the ramp up time. This is the original default, and is appropriate for tests where threads are active throughout most of the test. Yes. Scheduler. If selected, enables the scheduler. Yes. Start Time. If the scheduler checkbox is selected, one can choose an absolute start time. When you start your test, JMeter will wait until the specified start time to begin testing. Note the Startup Delay field over rides this see below. No. End Time. If the scheduler checkbox is selected, one can choose an absolute end time. When you start your test, JMeter will wait until the specified start time to begin testing, and it will stop at the specified end time. Note the Duration field over rides this see below. No. Duration seconds. If the scheduler checkbox is selected, one can choose a relative end time. JMeter will use this to calculate the End Time, and ignore the End Time value. No. Startup delay seconds. If the scheduler checkbox is selected, one can choose a relative startup delay. JMeter will use this to calculate the Start Time, and ignore the Start Time value. No. Work. BenchThe Work. Bench simply provides a place to temporarily store test elements while not in use, for copypaste purposes, or any other purpose you desire. When you save your test plan, Work. Bench items are not saved with it by default unless you check Save Workbench option. Your Work. Bench can be saved independently, if you like right click on Work. Bench and choose Save. Certain test elements are only available on the Work. Bench. Parameters. Attribute. Description. Required. Save Work. Bench. Allow to save the Work. Benchs elements into the JMX file. No. SSL Manager. The SSL Manager is a way to select a client certificate so that you can test. Public Key Infrastructure PKI. It is only needed if you have not set up the appropriate System properties. Choosing a Client Certificate. You may either use a Java Key Store JKS format key store, or a Public Key. Certificate Standard 1. PKCS1. 2 file for your client certificates. There. is a feature of the JSSE libraries that require you to have at least a six character. To select the client certificate, choose from the menu bar. You will be presented with a file finder that looks for PKCS1.