System IO Redirect : System « Development Class « Java
- Java
- Development Class
- System
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);
}
}
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