Adapter example2

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package com.eric.interfaceAndInnerClass;import java.io.IOException;import java.nio.CharBuffer;import java.util.Random;import java.util.Scanner;

/**Scanner 的构造器需要接受一个实现了Readable接口的类作为构造参数，为了让RandomDouble 可以被Scanner类所处理,所以RandomDouble 实现了Readable接口
这样就可以通过Scaner去处理RandomDouble了*/
public class ScannerRandomDouble {public static void main(String[] args) {Scanner scan = new Scanner(new RandomDouble(10));while (scan.hasNext()) {System.out.println(scan.next());}}}class RandomDouble implements Readable {private static Random    rand = new Random(47);private static final char[]capitals= "ABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();private static final char[]lowers = "abcdefghijklmnopqrstuvwxyz".toCharArray();private static final char[]vowels = "aeiou".toCharArray();private int                count;public RandomDouble(int count) {this.count = count;}public int read(CharBuffer cb) throws IOException {if (count-- <= 0)return -1;for (int i = 0; i < 4; i++) {cb.append(capitals[rand.nextInt(capitals.length)]);cb.append(lowers[rand.nextInt(lowers.length)]);}cb.append(vowels[rand.nextInt(vowels.length)]);cb.append('\n');return 9;}}