/**
* After this method is called, output will be sent to outputStream, provided it is non-null. If
* outputStream is null, then this method has the same effect as calling writeStandardOutput();
* that is, future output will be sent to the standard output stream.
*/
public static void writeStream(PrintWriter outputStream) {
if (outputStream == null) writeStandardOutput();
else {
out = outputStream;
outputFileName = null;
outputErrorCount = 0;
writingStandardOutput = false;
}
}
/**
* Opens a file with a specified name for output. If the file name is null, this has the same
* effect as calling writeStandardOutput(); that is, output will be sent to standard output. If an
* error occurs while trying to open the file, an exception of type IllegalArgumentException is
* thrown. If the file is opened successfully, then after this method is called, all of the output
* routines will write to the file, instead of to standard output. If an error occurs, the output
* destination is not changed.
*
* <p>NOTE: Calling this method starts a GUI user interface thread, which can continue to run even
* if the thread that runs the main program ends. If you use this method in a non-GUI program, it
* might be necessary to call System.exit(0) at the end of the main() routine to shut down the
* Java virtual machine completely.
*/
public static void writeFile(String fileName) {
if (fileName == null) // Go back to reading standard output
writeStandardOutput();
else {
PrintWriter newout;
try {
newout = new PrintWriter(new FileWriter(fileName));
} catch (Exception e) {
throw new IllegalArgumentException(
"Can't open file \"" + fileName + "\" for output.\n" + "(Error :" + e + ")");
}
if (!writingStandardOutput) {
try {
out.close();
} catch (Exception e) {
}
}
out = newout;
writingStandardOutput = false;
outputFileName = fileName;
outputErrorCount = 0;
}
}
/**
* After this method is called, output will be sent to outputStream, provided it is non-null. If
* outputStream is null, then this method has the same effect as calling writeStandardOutput();
* that is, future output will be sent to the standard output stream.
*/
public static void writeStream(OutputStream outputStream) {
if (outputStream == null) writeStandardOutput();
else writeStream(new PrintWriter(outputStream));
}
