Java.lang.Process.getErrorStream() Method

Description

The java.lang.Process.getErrorStream() method gets the error stream of the subprocess. The stream obtains data piped from the error output stream of the process represented by this Process object.

Declaration

Following is the declaration for java.lang.Process.getErrorStream() method

public abstract InputStream getErrorStream()

Parameters

NA

Return Value

This method returns the input stream connected to the error stream of the subprocess.

Exception

NA

Example

The following example shows the usage of lang.Process.getErrorStream() method.

package com.tutorialspoint;

import java.io.InputStream;

public class ProcessDemo {

   public static void main(String[] args) {
      try {
         // create a new process
         System.out.println("Creating Process...");
         Process p = Runtime.getRuntime().exec("notepad.exe");

         // get the error stream of the process and print it
         InputStream error = p.getErrorStream();
         for (int i = 0; i < error.available(); i++) {
            System.out.println("" + error.read());
         }

         // wait for 10 seconds and then destroy the process
         Thread.sleep(10000);
         p.destroy();

      } catch (Exception ex) {
         ex.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

Creating Process...