Java Writer cannot call append()

Thu Feb 9 13:05:00 GMT 2006

Hi, 
I did a test on GCJ4.2.0 on file output on Fedro code 3. 
The following lines of java code are the code I am testing: 
Writer output = new BufferedWriter(new FileWriter("out.d"));
output.append("random output");
output.newLine();
if I use gcj to compile the code, the following error will be found:
Client.java:51: error: Can't find method âappend(Ljava/lang/String;)â in type âjava.io.Writerâ.
 output.append("random output");
 ^
Client.java:52: error: Can't find method ânewLine()â in type âjava.io.Writerâ.
 output.newLine();
Any ideas why? 
Thanks 
Rui 