Usually not. Java is used by many programs, including with each piece of Java software, much more hard disk space will be used than necessary, and a whole new instance of JVM must be loaded for each of them. In addition, each piece of software must be updated whenever a security flaw is discovered. Therefore, it is often installed only once, often shortly after installing a new computer or installing the OS.
Sometimes a software package may be developed without assuming Java on the system; therefore, it may include its own. Sometimes he may also need an individual JVM.
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