File IO problem

[Mauro Iotti]

I need some help with a quite simple (not for me) problem...
I'm working with JBuilder and I wanna check if a file exists or not.
If not I wanna create it and then write some data in it, if yes I wanna
append the data.

Can someone help me?
Thank you!!

-PK

 

[Michael Borgwardt]

I need some help with a quite simple (not for me) problem...
I'm working with JBuilder and I wanna check if a file exists or not.
If not I wanna create it and then write some data in it, if yes I wanna
append the data.

Read the API: http://java.sun.com/j2se/1.4.1/docs/api/index.html

In this case, specifically that of the java.io.File class for testing existence
of files and the java.io.FileWriter and java.io.FileOutputStream classes
for writing to files. Creation is implicit, appending an option.

 

[VisionSet]

I need some help with a quite simple (not for me) problem...
I'm working with JBuilder and I wanna check if a file exists or not.
If not I wanna create it and then write some data in it, if yes I wanna
append the data.

Can someone help me?
Thank you!!

And please don't multi post!!

 

[Joe55]

Here is a code snippet, which I hope will help you:

try{

myFile = new File(sDirectory);

if (myFile.exists()){

//append the text to the existing
//use the constructor with the second parameter for append = true
fw = new FileWriter(sDirectory, true);
fw.write("file did already exist");
fw.close();

}else{

fw = new FileWriter(sDirectory);
fw.write("Here is some text");

//close the FileWriter
fw.close();
}
}catch (IOException e) {
System.out.println("Error writing to " + sDirectory);
}

 

[Joe55]

Here is a code snippet which I hope will help you:

//create a file object with the directory of the file
String sDirectory = "c:\\SampleDirectory\\Sample.txt";
File myFile;
FileWriter fw;

try{

myFile = new File(sDirectory);

if (myFile.exists()){

//append the text to the existing
//use the constructor with the second parameter for append = true
fw = new FileWriter(sDirectory, true);
fw.write("file did already exist");
fw.close();

}else{

fw = new FileWriter(sDirectory);
fw.write("Here is some text");

//close the FileWriter
fw.close();
}
}catch (IOException e) {
System.out.println("Error writing to " + sDirectory);
}