What is a process in Java?
The Process is an abstract class defined in the java.
lang package that encapsulates the runtime information of a program in execution.
The exec method invoked by the Runtime instance returns a reference to this class instance.
There is an another way to create an instance of this class, through the ProcessBuilder..
How do you start a process in Java?
Process process = Runtime. getRuntime(). exec(“processname”); Both of these will code snippets will spawn a new process, which usually executes asynchronously and can be interacted with through the resulting Process object.
What is runtime class in Java?
Every Java application has a single instance of class Runtime that allows the application to interface with the environment in which the application is running. The current runtime can be obtained from the getRuntime method. An application cannot create its own instance of this class.
How do you terminate a process in Java?
If the process you want to kill has been started by your applicationterminate process with destroy()allow process to exit gracefully with reasonable timeout.kill it with destroyForcibly() if process is still alive.
What is difference between error and exception?
Errors mostly occur at runtime that’s they belong to an unchecked type. Exceptions are the problems which can occur at runtime and compile time. It mainly occurs in the code written by the developers. Exceptions are divided into two categories such as checked exceptions and unchecked exceptions.
What is difference between thread and a process?
A process is a program under execution i.e an active program. A thread is a lightweight process that can be managed independently by a scheduler. Processes require more time for context switching as they are more heavy. Threads require less time for context switching as they are lighter than processes.