how to create a .dat file in java

Question

I want to create a .dat file in java which doesn't exist. I don't know how to manually create it either. I know that the following code:

 File f = new File(file); 

is used for the file, but what exactly is the code for a file which doesn't exist. In other words create a new file.

Answer 1

A statement like File f = new File(file); will not create a file on disk. Class java.io.File only represents a file path, not the actual file on disk.

To create a new file, open a FileOutputStream for it, which you can then use to write data to the file.

OutputStream out = new FileOutputStream("C:\\Temp\\filename.dat");
try {
    // Write data to 'out'
} finally {
    // Make sure to close the file when done
    out.close();
}