public class InputFileRead {
private File readFile = null;
private FileReader reader = null;
private String inputFilePath = null;
private final String DEFAULT_FILE_PATH = "c:\\somedirectory\\";

public InputFileRead() {
inputFilePath = DEFAULT_FILE_PATH;

}

public void setInputFile(String inputFile) {
/* Assume appropriate validation / encoding is used and privileges / permissions are preserved */

}

public void readInputFile() {
try {
reader = new FileReader(readFile);
...

} catch (RuntimeException rex) {
System.err.println("Error: Cannot open input file in the directory " + inputFilePath);
System.err.println("Input file has not been set, call setInputFile method before calling readInputFile");


} catch (FileNotFoundException ex) {...}

}

}