Java ProcessBuilder command() Method

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Description

The Java ProcessBuilder command() method returns this process builder's operating system program and arguments. The returned list is not a copy. Subsequent updates to the list will be reflected in the state of this process builder.

Declaration

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

public List<String> command()

Parameters

NA

Return Value

This method returns this process builder's program and its arguments

Exception

NA

Getting process details 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 to it. Using that list, we've initialized a ProcessBuilder instance. Now using command() method, we've printed the underlying operating system command name and other details.

package com.tutorialspoint;

import java.util.ArrayList;
import java.util.List;

public class ProcessBuilderDemo {

   public static void main(String[] args) {

      // create a new list of arguments for our process
      List<String> list = new ArrayList<>();
      list.add("notepad.exe");
      
      // create the process builder
      ProcessBuilder pb = new ProcessBuilder(list);
      
      // get the command list
      System.out.println(pb.command());
   }
}

Output

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

[notepad.exe]

Getting process details 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. Now using command() method, we've printed the underlying operating system command name and other details.

package com.tutorialspoint;

import java.util.ArrayList;
import java.util.List;

public class ProcessBuilderDemo {

   public static void main(String[] args) {

      // create a new list of arguments for our process
      List<String> list = new ArrayList<>();
      list.add("calc.exe");
      
      // create the process builder
      ProcessBuilder pb = new ProcessBuilder(list);
      
      // get the 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 process details for Windows 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. Now using command() method, we've printed the underlying operating system command name and other details.

package com.tutorialspoint;

import java.util.ArrayList;
import java.util.List;

public class ProcessBuilderDemo {

   public static void main(String[] args) {

      // create a new list of arguments for our process
      List<String> list = new ArrayList<>();
      list.add("explorer.exe");
      
      // create the process builder
      ProcessBuilder pb = new ProcessBuilder(list);
      
      // get the command list
      System.out.println(pb.command());
   }
}

Output

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

[notepad.exe]