How to redirect standard output/err to a file?



PrintStream err=null;
PrintStream out=null;
String outputFile="C://output.txt";
String errorFile="C://error.txt";

err=new PrintStream(new FileOutputStream(errorFile));
System.setErr(err);

//append all outputs
out=new PrintStream(new FileOutputStream(outputFile,true));
System.setOut(out);

System.err.print("This is error written to file");
System.out.print("This is output written to file");