Running a python file via java-CodePudding

ok I am trying to execute a python file (test1.py) with a java program. here's our code:

import java.io.*;
import java.nio.charset.StandardCharsets;

public class pro {
    public Process mProcess;

    public pro() {
        Process process;
        try {
            process = Runtime.getRuntime().exec("test1.py");
            mProcess = process;
        } catch (Exception e) {
            System.out.println("Exception Raised"   e.toString());
        }
        InputStream stdout = (mProcess != null) ? mProcess.getInputStream(): null;
        BufferedReader reader = new BufferedReader(new InputStreamReader(stdout, StandardCharsets.UTF_8));
        String line;
        try {
            while ((line = reader.readLine()) != null) {
                System.out.println("stdout: "   line);
            }
        } catch (IOException e) {
            System.out.println("Exception in reading output"   e.toString());
        }
    }
}

the line process = Runtime.getRuntime().exec(new String[] { "test1.py"}); throws Exception Raisedjava.io.IOException: Cannot run program "test1.py": CreateProcess error=193, %1 is not a valid Win32 application

whats wrong?

CodePudding user response：

The only problem I see is in this line

process = Runtime.getRuntime().exec("test1.py");

test1.py is just a python file, you need to tell exec how to run this file like we do in shell or command prompt

process = Runtime.getRuntime().exec("python test1.py");

CodePudding user response：

Runtime.getRuntime().exec() runs something in the command line. So we changed it to process = Runtime.getRuntime().exec("python .\\test1.py") and it works!