How to run windows exe and bat files using java?

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This is example of run exe and batch files from java code and catch response from them in java.

Then create four java files in com.narayanatutorial.main package.

1. RunExeMain.java
2. RunWithParamMain.java
3. RunBatchMain.java
4. GetResponseMain.java

1) RunExeMain.java

This file run exe file (Here cmd.exe) using java program.

     public class RunExeMain {
        //This is Example that display how to run exe using java
        public static void main(String args[])
        {
            String filePath = "C:/Windows/cmd.exe";
            try{
                  Process p = Runtime.getRuntime().exec(filePath);  
            } catch(Exception e) {
                e.printStackTrace();
            }
            
        }
    }

2) RunWithParamMain.java
This file run exe file and pass some parameter to it (Here we run notepad.exe and pass test.txt file to open) using java program.

    public class RunWithParamMain { 
        //This is Example that display how to run exe and pass parameter using java
        public static void main(String args[])
        {   
            String filePath = "C:/Windows/Notepad.exe D:/test.txt";
            try {
                Process p = Runtime.getRuntime().exec(filePath);
             } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

3) RunBatchMain.java
This file run batch file (Here test.bat) using java program.

     public class RunBatchMain {
        //This is Example that display how to run batch using java
        public static void main(String args[])
        {
            //Run batch file using java
            String filePath = "D:/test.bat";
            try {            
                Process p = Runtime.getRuntime().exec(filePath);
              } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

4) GetResponseMain.java
This file run test.bat file and catch response from it using java program.

test.bat will contain the following data

@echo off
echo “this is test example”

    public class GetResponseMain {
        public static void main(String args[])
        {
            String filePath = "D:/test.bat";
            try {
               Process p = Runtime.getRuntime().exec(filePath);
                p.waitFor();
                InputStream in = p.getInputStream();
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                 
                int c = -1;
                while((c = in.read()) != -1){
                    baos.write(c);
                }
                 
                String response = new String(baos.toByteArray());
                System.out.println("Response From Exe : "+response);
                 
            } catch (Exception e) {
                e.printStackTrace();
            }
             
        }
    }

  Output :
    Response From Exe : “this is test example”