How Can I Execute Piped Commands Using Java's Runtime.exec()?

Executing Piped Commands with Runtime.exec()

Despite the inherent cross-platform challenges, the Runtime.exec() method provides limited support for piping in Java. Here's how you can leverage it:

Option 1: Utilizing Shell Scripts

As suggested in the answer, you can create an intermediate script that encapsulates the piping commands. For instance:

#! /bin/sh
ls /etc | grep release

Then execute this script via Runtime.exec():

Process process = Runtime.getRuntime().exec(new String[] {"/path/to/script"});

Option 2: Explicitly Passing Piping Commands

To bypass the shell, you can supply the piping commands within the Runtime.exec() arguments array:

String[] cmd = {
    "/bin/sh",
    "-c",
    "ls /etc | grep release"
};

Process process = Runtime.getRuntime().exec(cmd);

This ensures that the shell is invoked with the explicit commands and will execute them accordingly.

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