Menu
The java.io.Writer interface has two methods called append and write. What are the differences between these two? It even says that
An invocation of this method of the form
out.append(c)behaves in exactly the same way as the invocationout.write(c)
so what is the reason for having two method name variants?
481
Solution. The write mode creates a new file. append mode is used to add the data at the end of the file if the file already exists. If the file is already existing write mode overwrites it.
FileWriter writes directly into Files and should be used only when the number of writes is less. BufferedWriter: BufferedWriter is almost similar to FileWriter but it uses internal buffer to write data into File. So if the number of write operations is more, the actual IO operations are less and performance is better.
FileWriter takes an optional second parameter: append . If set to true, then the data will be written to the end of the file. This example appends data to a file with FileWriter .
The Writer class of the java.io package is an abstract superclass that represents a stream of characters. Since Writer is an abstract class, it is not useful by itself. However, its subclasses can be used to write data.
There are minor differences between append() and write(). All of which you can work out by reading the Javadocs. Hint. ;)
void write is an older style format created before CharSequence was available.
These methods are overloaded so that there is a
write(int) where the int is cast to a char. append(char) must be a char type.write(char[] chars) takes an array of char, there is no equivalent append().
142
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
