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What is the purpose of Process class in Java?
The java.lang.Process is a subclass of Object class and it can describe the processes that are started by the exec() method of Runtime class. A Process object controls the process and gets information about it. The Process class is an abstract class, therefore, it cannot be instantiated. The important method s of the Process class are destroy(), exitValue(), getErrorStream(), waitFor(), getInputStream() and getOutputStream().
Syntax
public abstract class Process extends Object
Example
import java.util.concurrent.*;
public class ProcessTest {
public static void main(String[] args) throws Exception {
Runtime runtime = Runtime.getRuntime();
System.out.println("Launching of Notepad Application");
Process process = runtime.exec("Notepad.exe"); // Launch a Notepad application
System.out.println("Wait for 5 seconds");
p.waitFor(5, TimeUnit.SECONDS);
System.out.println("Exit of Notepad Application");
process.destroy(); // destroy the application
}
}In the above program, we are implementing a Process class. Whenever we can call the exec("Notepad.exe") method of Runtime class, it launches the notepad application and destroys the application after 5 seconds.
Output
Launching of Notepad Application Wait for 5 seconds Exit of Notepad Application
Updated on: 10-Feb-2020
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