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System IO Redirect

import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.PrintStream; public class Redirect {   public static void main(String args[]) throws Exception {     PrintStream origOut = System.out;     PrintStream origErr = System.err;     InputStream stdin = null;     stdin = new FileInputStream("Redirect.in");     PrintStream stdout = null;     stdout = new PrintStream(new FileOutputStream("Redirect.out"));     PrintStream stderr = null;     stderr = new PrintStream(new FileOutputStream("Redirect.err"));     origOut.println("1");     System.out.println("2");     origOut.println("3");     System.err.println("4");     origErr.println("5");     System.setIn(stdin);     System.setOut(stdout);     System.setErr(stderr);     origOut.println("\nR");     System.out.println("T");     origOut.println("Tq");     System.err.println("Tqw");     origErr.println("Test");     origOut.println("\nRedirect:  Round #3");     int inChar = 0;     while (-1 != inChar) {       try {         inChar = System.in.read();       } catch (Exception e) {         // Clean up the output and bail.         origOut.print("\n");         break;       }       origOut.write(inChar);     }     stdin.close();     stdout.close();     stderr.close();     System.exit(0);   } }