// Paying attention to exceptions
// in constructors.
import java.io.*;
class InputFile {
private BufferedReader in;
InputFile(String fname) throws Exception{
try {
in =
new BufferedReader(
new FileReader(fname));
// Other code that might throw exceptions
} catch(FileNotFoundException e) {
System.err.println(
"Could not open " + fname);
// Wasn't open, so don't close it
throw e;
} catch(Exception e) {
// All other exceptions must close it
try {
in.close();
} catch(IOException e2) {
System.err.println(
"in.close() unsuccessful");
}
throw e; // Rethrow
} finally {
// Don't close it here!!!
}
}
String getLine() {
String s;
try {
s = in.readLine();
} catch(IOException e) {
System.err.println(
"readLine() unsuccessful");
s = "failed";
}
return s;
}
void cleanup() {
try {
in.close();
} catch(IOException e2) {
System.err.println(
"in.close() unsuccessful");
}
}
}
public class Cleanup {
public static void main(String[] args) {
try {
InputFile in =
new InputFile("Cleanup.java");
String s;
int i = 1;
while((s = in.getLine()) != null)
