Why is Java\'s Runtime Exec() Method Not Redirecting Output?

Java's Runtime Exec() Method Not Redirecting Output

When attempting to redirect the output of a script executed with Runtime.getRuntime().exec(), users may encounter an issue where the redirection is ineffective and no output file is generated.

To resolve this problem, ProcessBuilder should be employed for redirection. The following code snippet demonstrates the correct approach:

<code class="java">ProcessBuilder builder = new ProcessBuilder("sh", "somescript.sh");
builder.redirectOutput(new File("out.txt"));
builder.redirectError(new File("out.txt"));
Process p = builder.start(); // may throw IOException</code>

This approach ensures that both standard output and error output from the script are redirected to the specified file, ensuring that the script's output is successfully captured.

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