w3hJava

This is a good feature for all those developer who do a lot of file reading, writing stuff. Java SE 6.0 gives us the feature to set file read only. There are lot of place where its correct and valid to set file as read only rather than leaving it read-write. Like you are writing some version repository or some file that should not be changed.

Here is a small code to change the file read mode:

import java.io.File;
import java.io.IOException;

public class FileReadOnly {

public static void main(String[] args) throws IOException {

File file = new File(”test.txt”);

file.createNewFile();
System.out.println(”Before. canWrite?” + file.canWrite());

file.setWritable(false);
System.out.println(”After. canWrite?” + file.canWrite());
}
}

So, from next time don’t forget to use this.

If liked it, then why not share!

Take care of disk space when you are writing a big program :). Use JDK 6 features:

import java.io.File;

public class DiskSpaceCheck {
public DiskSpaceCheck() {
File file = new File("E:");
System.out.println("E:");
System.out.println("Total:  " + file.getTotalSpace());
System.out.println("Free:   " + file.getFreeSpace());
System.out.println("Usable: " + file.getUsableSpace());

file = new File("E://movie");
System.out.println("E://movie");
System.out.println("Total:  " + file.getTotalSpace());
System.out.println("Free:   " + file.getFreeSpace());
System.out.println("Usable: " + file.getUsableSpace());

file = new File("/");
System.out.println("n/");
System.out.println("Total:  " + file.getTotalSpace());
System.out.println("Free:   " + file.getFreeSpace());
System.out.println("Usable: " + file.getUsableSpace());
}

public static void main(String[] args) {
new DiskSpaceCheck();
}
}

I was actually very suprised that why this feature came so late.

If liked it, then why not share!