/**
* After this method is called, input will be read from inputStream, provided it is non-null. If
* inputStream is null, then this method has the same effect as calling readStandardInput(); that
* is, future input will come from the standard input stream.
*/
public static void readStream(Reader inputStream) {
if (inputStream == null) readStandardInput();
else {
if (inputStream instanceof BufferedReader) in = (BufferedReader) inputStream;
else in = new BufferedReader(inputStream);
inputFileName = null;
readingStandardInput = false;
inputErrorCount = 0;
}
}
/**
* Opens a file with a specified name for input. If the file name is null, this has the same
* effect as calling readStandardInput(); that is, input will be read from standard input. If an
* error occurs while trying to open the file, an exception of type IllegalArgumentException is
* thrown, and the input source is not changed. If the file is opened successfully, then after
* this method is called, all of the input routines will read from the file, instead of from
* standard input.
*/
public static void readFile(String fileName) {
if (fileName == null) // Go back to reading standard input
readStandardInput();
else {
BufferedReader newin;
try {
newin = new BufferedReader(new FileReader(fileName));
} catch (Exception e) {
throw new IllegalArgumentException(
"Can't open file \"" + fileName + "\" for input.\n" + "(Error :" + e + ")");
}
if (!readingStandardInput) { // close current input stream
try {
in.close();
} catch (Exception e) {
}
}
in = newin;
readingStandardInput = false;
inputErrorCount = 0;
inputFileName = fileName;
}
}
/**
* After this method is called, input will be read from inputStream, provided it is non-null. If
* inputStream is null, then this method has the same effect as calling readStandardInput(); that
* is, future input will come from the standard input stream.
*/
public static void readStream(InputStream inputStream) {
if (inputStream == null) readStandardInput();
else readStream(new InputStreamReader(inputStream));
}
