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  2. Exit status - Wikipedia

    en.wikipedia.org/wiki/Exit_status

    In Java, any method can call System.exit(int status), unless a security manager does not permit it.This will terminate the currently running Java Virtual Machine. "The argument serves as a status code; by convention, a nonzero status code indicates abnormal termination."

  3. Database connection - Wikipedia

    en.wikipedia.org/wiki/Database_connection

    A connection is required to send commands and receive answers, usually in the form of a result set. Connections are a key concept in data-centric programming. Since some DBMS engines require considerable time to connect, connection pooling was invented to improve performance. No command can be performed against a database without an "open and ...

  4. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    As the HTTP/1.0 standard did not define any 1xx status codes, servers must not [note 1] send a 1xx response to an HTTP/1.0 compliant client except under experimental conditions. 100 Continue The server has received the request headers and the client should proceed to send the request body (in the case of a request for which a body needs to be ...

  5. Working directory - Wikipedia

    en.wikipedia.org/wiki/Working_directory

    Where available, it can be called by a process to set its working directory. There are similar functions in other languages. For example, in Visual Basic it is usually spelled CHDIR(). In Java, the working directory can be obtained through the java.nio.file.Path interface, or through the java.io.File class. The working directory cannot be changed.

  6. Select (SQL) - Wikipedia

    en.wikipedia.org/wiki/Select_(SQL)

    SELECT is the most common operation in SQL, called "the query".SELECT retrieves data from one or more tables, or expressions.Standard SELECT statements have no persistent effects on the database.

  7. Exception handling (programming) - Wikipedia

    en.wikipedia.org/wiki/Exception_handling...

    In an interactive log-file browser, the right thing to do might be to return the entry unparsed, so the user can see it—but in an automated log-summarizing program, the right thing to do might be to supply null values for the unreadable fields, but abort with an error, if too many entries have been malformed.

  8. List of Java bytecode instructions - Wikipedia

    en.wikipedia.org/wiki/List_of_Java_bytecode...

    push the constant 0.0 (a double) onto the stack dconst_1 0f 0000 1111 → 1.0 push the constant 1.0 (a double) onto the stack ddiv 6f 0110 1111 value1, value2 → result divide two doubles dload 18 0001 1000 1: index → value load a double value from a local variable #index: dload_0 26 0010 0110 → value load a double from local variable 0 ...

  9. Comparison of programming languages (basic instructions ...

    en.wikipedia.org/wiki/Comparison_of_programming...

    Arithmetic operations support polymorphic arguments and return the result in the most appropriate compact representation. ^j Ada range types are checked for boundary violations at run-time (as well as at compile-time for static expressions).