What is the Java equivalent of Python's subprocess.Popen()?

import subprocess
import os

prefix =开发者_开发技巧 os.path.expanduser("~/.bin/kb/")
p = subprocess.Popen([(prefix + "koreball"),(prefix + "/data"),'3'])

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Your can try with the Runtime.exec method.

Runtime runtime = Runtime.getRuntime();
Process process = runtime.exec("myprocess");

The method returns a Process that can be used to:

• Retrieve the process output, input and error streams
• Retrieve the process output code
• Kill the process
• Wait for the end of the process execution

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It's not clear what you're asking, but if you're looking for the Java equivalent of Popen(), you want Runtime.exec().

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Use ProcessBuilder e.g.

static void SimpleProcess() throws IOException, InterruptedException {

    ProcessBuilder pb = new ProcessBuilder("ls", ".")
            .inheritIO();

    Process p = pb.start();

    int retval = p.waitFor();
    System.out.println("exited with code "  + retval);
}