Java Runtime Environment (JRE) - Runtime Environment created by Sun Microsystems that allows to run and use applications written in the programming language Java. It consists of a virtual machine - Java Virtual Machine and Java-library classes. Written in the Java language a lot of programs and games, especially those for whom mobility is important. Some Web pages are also using Java. One of the advantages of Java is its cross-platform, that is, applications written in this language can be used on different operating systems where you installed Java Runtime Environment (JRE) .
Key features:
Automatic memory management;
advanced exception handling;
rich set of filtering I / O;
a set of standard collections such as array, list, stack, and so on;
availability of simple tools for building network applications (including the protocol RMI);
existence of classes that perform HTTP-requests and process responses;
built into the language tools for creating multi-threaded applications;
unified access to databases:
at the level of SQL-queries - based on JDBC, SQLJ;
at the concept of objects that are able to store in a database - based on Java Data Objects (English) and the Java Persistence API (English);
template support (version 1.5); parallel execution of programs.
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