Is there a possibility of redirecting standard input and output streams?

Yes, it exists.

In Java, this can be done using the methods System.setIn(), System.setOut(), and System.setErr() of the System class. These methods accept objects of classes that extend InputStream, PrintStream, and PrintStream, respectively.

Example of redirecting standard output to a file:

import java.io.PrintStream;
import java.io.FileNotFoundException;

// ...

PrintStream originalOut = System.out; // Save the original stream

try {
    PrintStream fileOut = new PrintStream("output.txt");
    System.setOut(fileOut); // Redirect System.out to a file

    System.out.println("This text will be written to output.txt file");

    fileOut.close(); // Close the file stream

} catch (FileNotFoundException e) {
    e.printStackTrace();
} finally {
    System.setOut(originalOut); // Restore the original System.out stream
}

Example of redirecting standard input from a string:

import java.io.ByteArrayInputStream;
import java.io.InputStream;

// ...

String inputString = "This is a test input string";
InputStream originalIn = System.in; // Save the original stream

try {
    InputStream newIn = new ByteArrayInputStream(inputString.getBytes());
    System.setIn(newIn); // Redirect System.in from the string

    // Now reading from System.in will occur from the `inputString`
    // For example, using Scanner:
    // Scanner scanner = new Scanner(System.in);
    // String readLine = scanner.nextLine();
    // System.out.println("Read from standard input: " + readLine);

} finally {
    System.setIn(originalIn); // Restore the original System.in stream
}