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Demonstrates standard IO redirection

// : c12:Redirecting.java // Demonstrates standard I/O redirection. // {Clean: test.out} // From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002 // www.BruceEckel.com. See copyright notice in CopyRight.txt. import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintStream; public class Redirecting {   // Throw exceptions to console:   public static void main(String[] args) throws IOException {     PrintStream console = System.out;     BufferedInputStream in = new BufferedInputStream(new FileInputStream(         "Redirecting.java"));     PrintStream out = new PrintStream(new BufferedOutputStream(         new FileOutputStream("test.out")));     System.setIn(in);     System.setOut(out);     System.setErr(out);     BufferedReader br = new BufferedReader(new InputStreamReader(System.in));     String s;     while ((s = br.readLine()) != null)       System.out.println(s);     out.close(); // Remember this!     System.setOut(console);   } } ///:~