Executing Shell command from Java code
In this post let us learn the way of executing a shell command through a java class.
In JAVA we have a class called “java.lang.Runtime” which is used to interact with Runtime system and has facility to execute any shell commands using Runtime.getRuntime().exec() method.
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; class ExecuteProcess { public void executeCommand() { String command = "ls -ltr"; Runtime run = Runtime.getRuntime(); Process process = null; try { process = run.exec(command); } catch (IOException e) { e.printStackTrace(); } try { process.waitFor(); } catch (InterruptedException e) { e.printStackTrace(); } BufferedReader br = new BufferedReader(new InputStreamReader( process.getInputStream())); String line = ""; try { while ((line = br.readLine()) != null) { System.out.println(line); } } catch (IOException e) { e.printStackTrace(); } } }
Note: This kind of implementations are discourage by java programming language since you will lose platform independence which is why we mostly used JAVA.
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