File creation
In this chapter you will learn:
- How to create a physical file on disk
- How to create a temporary file
- How to create a temporary file with the directory you passed in
Create a file
We can create a file once we have a File object. We can also choose to create file or a temp file.
boolean createNewFile()
creates a new file.static File createTempFile(String prefix, String suffix)
creates a file in default temporary-file directory with prefix and suffix.static File createTempFile(String prefix, String suffix, File directory)
creates a file in the specified directory with prefix and suffix.
import java.io.File;
import java.io.IOException;
//from jav a2 s . c om
public class Main {
public static void main(String[] args) {
File aFile = new File("c:/aFolder");
try {
System.out.println(aFile.createNewFile());
} catch (IOException e) {
e.printStackTrace();
}
}
}
Create a temporary file
The following code creates a temporary file under user's home directory.
import java.io.File;
import java.io.IOException;
/*j a v a 2 s. c o m*/
public class Main {
public static void main(String[] args) {
try {
File tempFile = File.createTempFile("abc","txt");
System.out.println(tempFile);
} catch (IOException e) {
e.printStackTrace();
}
}
}
create a temporary file with a directory
The code below creates a temporary file with the directory you passed in:
import java.io.File;
import java.io.IOException;
/*from j a va 2 s . c om*/
public class Main {
public static void main(String[] args) {
try {
File tempFile = File.createTempFile("abc","txt",new File("c:\\"));
System.out.println(tempFile);//
} catch (IOException e) {
e.printStackTrace();
}
}
}
The code above generates the following result.
Next chapter...
What you will learn in the next chapter: