Find the error(s) in the following code, which is supposed to read a line from some- file.txt, convert the line to uppercase, then append it to somefile.txt.

Question

```
1 String file = "someFile.txt";
2 String contents;
3
4 File someFile = new File( file );
5 FileReader inputFile = new FileReader( someFile );
6 BufferedReader input = new BufferedReader( inputFile );
7
8 contents = input.readLine();
9
10 contents = contents.toUpperCase();
11
12 input.close();
13
14 FileWriter outputFile = new FileWriter( someFile, false );
15 PrintWriter output = new PrintWriter( outputFile );
16
17 output.println( contents );
18 output.close();
```

Answer 1

There are two problems with the code above. The first is that the FileWriter is passed a second argument of false, so any new data written to someFile.txt will overwrite previous data. The other problem is that the code above must be placed within a try block, with a corresponding catch block, in case an IOException is thrown.

```
1 String file = "somefile.txt";
2 String contents;
3
4 try
5 {
6 File someFile = new File( file );
7 FileReader inputFile = new FileReader( someFile );
8 BufferedReader input = new BufferedReader( inputFile );
9
10 contents = input.readLine();
11
12 contents = contents.toUpperCase();
13
14 input.close();
15
16 FileWriter outputFile = new FileWriter( someFile, true );
17 PrintWriter output = new PrintWriter( outputFile );
18
19 output.println( contents );
20 output.close();
21 }
22 catch( IOException exception )
23 {
24 JOptionPane.showMessageDialog( this, "IOException occured." );
25 }
```