Java ProcessBuilder command() Method

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Description

The Java ProcessBuilder command(String... command) method Sets this process builder's operating system program and arguments. This is a convenience method that sets the command to a string list containing the same strings as the command array, in the same order. It is not checked whether command corresponds to a valid operating system command.

Declaration

Following is the declaration for java.lang.ProcessBuilder.command() method

public ProcessBuilder command(String... command)

Parameters

command − A string array containing the program and its arguments

Return Value

This method returns this process builder

Exception

NA

Getting list of process for Notepad from a Process Builder Example

The following example shows the usage of ProcessBuilder command() method. In this program, we've created a list of Strings and added notepad.exe and text.txt to it. Using that list, we've initialized a ProcessBuilder instance. Using command(list) method, we've added a list to the ProcessBuilder. Then we've printed the underlying operating system command name and other details.

package com.tutorialspoint;

public class ProcessBuilderDemo {

   public static void main(String[] args) {

      // create a new list of arguments for our process
      String[] list = {"notepad.exe", "test.txt"};

      // create the process builder
      ProcessBuilder pb = new ProcessBuilder(list);

      // set the command list
      pb.command(list);

      // print the new command list
      System.out.println(pb.command());
   }
}

Output

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

[notepad.exe, test.txt]

Getting list of process for Calculator from a Process Builder Example

The following example shows the usage of ProcessBuilder command() method. In this program, we've created a list of Strings and added calc.exe to it. Using that list, we've initialized a ProcessBuilder instance. Using command(list) method, we've added a list to the ProcessBuilder. Then we've printed the underlying operating system command name and other details.

package com.tutorialspoint;

public class ProcessBuilderDemo {

   public static void main(String[] args) {

      // create a new list of arguments for our process
      String[] list = {"calc.exe"};

      // create the process builder
      ProcessBuilder pb = new ProcessBuilder(list);

      // set the command list
      pb.command(list);

      // print the new command list
      System.out.println(pb.command());
   }
}

Output

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

[calc.exe]

Getting list of process for Explorer from a Process Builder Example

The following example shows the usage of ProcessBuilder command() method. In this program, we've created a list of Strings and added explorer.exe to it. Using that list, we've initialized a ProcessBuilder instance. Using command(list) method, we've added a list to the ProcessBuilder. Then we've printed the underlying operating system command name and other details.

package com.tutorialspoint;

public class ProcessBuilderDemo {

   public static void main(String[] args) {

      // create a new list of arguments for our process
      String[] list = {"explorer.exe"};

      // create the process builder
      ProcessBuilder pb = new ProcessBuilder(list);

      // set the command list
      pb.command(list);

      // print the new command list
      System.out.println(pb.command());
   }
}

Output

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

[explorer.exe]