"Thinkinginjava" 44, Data generator

<pre name= "code" class= "java" >//: net/mindview/util/generator.java//A Generic Interface.package Net.mindview.util;public interface Generator<t> {T next ();}///:~

/*** Book: Thinking in Java * Function: Data Generator--Strategy design mode * File: countinggenerator.java* time: April 29, 2015 19:05:09* Author: cutter_point*/ Package Net.mindview.util;public class countinggenerator{//A Boolean static class public static classes Boolean implements Generator <java.lang.boolean>{private Boolean value = false; @Overridepublic Java.lang.Boolean Next () {// Returns a value that is the opposite of values value =!value;return value;}} Static class of byte type public static classes byte implements Generator<java.lang.byte>{private byte value = 0; @Overridepublic Java.lang.Byte Next () {///Next is add a bit and return the previous value of return value++;}} The static character array contains all the letters static char[] chars = ("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"). ToCharArray ();/ Character-type public static class Character implements Generator<java.lang.character>{int index = -1;//indexes @override// Get a string of characters inside the public Java.lang.Character next () {index = (index + 1)%chars.length;//look at the next character in all the letters of the first return Chars[index];}} String type public static class string implements Generator<java.lang.string>{private int length = 7; Generator<java.lang.Character> CG = new Character ();p ublic string () {}public string (int length) {this.length = length;} Public java.lang.String Next () {char[] buf = new Char[length];for (int i = 0; i < length; ++i) {Buf[i] = Cg.next ();} return new java.lang.String (BUF);}} Data public for short type static class short implements Generator<java.lang.short>{private short value = 0;@ Overridepublic Java.lang.Short Next () {return value++;}} public static class Integer implements Generator<java.lang.integer>{private int value = 0; @Overridepublic Java.lang.Integer Next () {return value++;}}    public static class Float implements Generator<java.lang.float> {private Float value = 0;      Public Java.lang.Float Next () {Float result = value;      Value + = 1.0;    return result; }}public Static class Double implements generator<java.lang.double>{private Double value = 0.0;public Java.lang.Double Next () {Double result = Value;value + = 1.0;return result;}} public static void MaiN (java.lang.string[] args)//{//byte B = new Byte (),//int i = B.next ();//system.out.println (i);////system.out.println ( New Character (). Next ());////string s = new String (9);////system.out.println (S.next ());/}}

/*** book: "Thinking in Java" * Function: Data Generator--strategy design mode--Test class * File: countinggenerator.java* time: April 29, 2015 19:05:09* Author: cutter_point* /package Lesson16arrays;import Net.mindview.util.countinggenerator;import Net.mindview.util.generator;public class generatorstest{public static int size = 10;public static void Test (Class<?> surroundingclass) {for (class<?> Type:surroundingClass.getClasses ())//Get the class inside this class object {//Get an array of this type System.out.println (Type.getsimplename () + ":"); try{ generator<?> g = (generator<?>) type.newinstance (); Gets an instantiated object//output his count for (int i = 0; i < size; ++i) {System.out.printf (G.next () + "");} System.out.println ();} catch (Exception e) {e.printstacktrace ();}}} public static void Main (string[] args) {test (countinggenerator.class);}}

Output:

Boolean:
True false to False to true false true false if
Byte:
0 1 2 3 4 5 6 7 8 9
Character:
A b c d e F g h i J
Double:
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
Float:
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
Integer:
0 1 2 3 4 5 6 7 8 9
Short:
0 1 2 3 4 5 6 7 8 9
String:
ABCDEFG hijklmn opqrstu vwxyzab cdefghi jklmnop qrstuvw xyzabcd Efghijk LMNOPQR

"Thinkinginjava" 44, Data generator