How to Execute a Bash Shell Script from Java?

How can I execute a Bash shell script from a Java application?

ProcessBuilder processBuilder = new ProcessBuilder("/path/to/script.sh");
processBuilder.inheritIO();
Process process = processBuilder.start();
int exitCode = process.waitFor();
System.out.println("Exited with code: " + exitCode);

Executing a Bash shell script from a Java application can be achieved using the `ProcessBuilder` or `Runtime.exec()` method provided by the JDK. This process allows Java to interact with system commands and scripts, enabling you to harness the power of shell commands seamlessly within your Java applications.

// Example of running a Bash script using ProcessBuilder
try {
    ProcessBuilder processBuilder = new ProcessBuilder("/path/to/your/script.sh");
    processBuilder.inheritIO();
    Process process = processBuilder.start();
    int exitCode = process.waitFor();
    System.out.println("Exited with code: " + exitCode);
} catch (IOException | InterruptedException e) {
    e.printStackTrace();
}

Causes

• Lack of appropriate permissions to execute the script.
• Incorrect path to the script has been provided.
• Environment variables are not configured properly.

Solutions

• Ensure the Bash script has executable permissions by running `chmod +x script.sh`.
• Specify the absolute path of the script in the `ProcessBuilder`.
• Set up any required environment variables in the `ProcessBuilder` before starting the process.

Mistake: Not using the correct path to the shell script.

Solution: Always provide the absolute path to the script to avoid confusion.

Mistake: Script does not have execute permissions.

Solution: Run the command `chmod +x /path/to/your/script.sh` to make it executable.

Mistake: Forgetting to handle the IOException and InterruptedException.

Solution: Ensure to surround your code with try-catch blocks to handle these exceptions properly.