Java-Buddy

This example demonstrate how to run system commnad ("dir" in Windows) from Java code, and read the output of the command, using Runtime.getRuntime().exec().

package java_process;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
 *
 * @web java-buddy.blogspot.com
 */
public class Java_Process {
 public static void main(String[] args) {
 // Example to run "dir" in Windows
 String[] command = {"cmd", "/c", "dir"};
 StringBuilder cmdReturn = new StringBuilder();
 try {
 Process process = Runtime.getRuntime().exec(command);
 try (InputStream inputStream = process.getInputStream()) {
 int c;
 while ((c = inputStream.read()) != -1) {
 cmdReturn.append((char) c);
 }
 }
 System.out.println(cmdReturn.toString());
 } catch (IOException ex) {
 Logger.getLogger(Java_Process.class.getName())
 .log(Level.SEVERE, null, ex);
 }
 }
}

Related:
- ProcessBuilder to create operating system processes

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