Writing Files - Beginning Java - page 477

import java.util.*; // Formatter and

EnumSet
import java.io.IOException;

public class UsingAFormatter {
public static void main(String[] args) {
String[] phrases = {"Rome wasn't burned in a day.",
"It's a bold mouse that sits in the cat's

ear.",

"An ounce of practice is worth a pound of

instruction."

};
String separator = System.lineSeparator(); // Get line

separator
Path file = Paths.get(System.getProperty("user.home")).
resolve("Beginning Java
Stuff").resolve("Phrases.txt");
try {
// Make sure we have the directory
Files.createDirectories(file.getParent());
} catch (IOException e) {
e.printStackTrace();
System.exit(1);

}
System.out.println("New file is: " + file);

try (WritableByteChannel channel = Files.newByteChannel(
file, EnumSet.of(WRITE, CREATE,

APPEND))) {

ByteBuffer buf = ByteBuffer.allocate(1024);
CharBuffer charBuf = buf.asCharBuffer(); // Create a view buffer
System.out.println("Char view buffer:");
System.out.printf("position = %2d Limit = %4d capacity =
%4d%n",

charBuf.position(),charBuf.limit(),charBuf.capacity());

Formatter formatter = new Formatter(charBuf);

// Write to the view buffer using a formatter
int number = 0; // Proverb number

for(String phrase : phrases) {
formatter.format("Proverb%2d: %s%s", ++number, phrase,
separator);
System.out.println("\nView buffer after loading:");
System.out.printf("position = %2d Limit = %4d capacity =

%4d%n",

charBuf.position(),
charBuf.limit(),charBuf.capacity());

charBuf.flip(); // Flip the view buffer
System.out.println("View buffer after flip:");