Download Java and java Official Website

Download Java and java Official Website
Thinking in Java1

//: object/HelloDate.java/** * Default initialize class. * @author C.L.Wang * @author Caroline Wendy * @version 1.0 */public class Main extends ShowProperties {    /**     * Entrv point to class & application.     * @param args array of string arguments     * @throws java.lang.Exception No exceptions thrown     */    public static void main(String[] args) {        DefaultInit di = new DefaultInit();        System.out.println("default int = " + di.i + ", default char = " + di.c);    }    /**     * Output:     * default int = 0, default char =     *///:~}

2

//: object/HelloDate.java/** * Say Hello World * @author C.L.Wang * @author Caroline Wendy * @version 1.0 */public class Main extends ShowProperties {    /**     * Entrv point to class & application.     * @param args array of string arguments     * @throws java.lang.Exception No exceptions thrown     */    public static void main(String[] args) {        System.out.println("Hello, World");    }    /**     * Output:     * Hello, World     *///:~}

3

public class ATNTest {   public static void main(String[] args) {      class ATypeName {         int i;         double d;         boolean b;         void show() {            System.out.println(i);            System.out.println(d);            System.out.println(b);         }      }      ATypeName a = new ATypeName();      a.i = 3;      a.d = 2.7;      a.b = false;      a.show();   }}

4 & 5

//: object/DataOnlyTest.java// TIJ4 Chapter Object Exercise 4 page 90// Turn the DataOnly code fragments into a program that compiles and runsclass DataOnly {  int i;  double d;  boolean b;  void show() {      System.out.println(i);      System.out.println(d);      System.out.println(b);  }}public class DataOnlyTest {  public static void main(String[] args) {      DataOnly data = new DataOnly();      data.i = 47;      data.d = 1.1;      data.b = false;      data.show();  }}/*** Output:* 47* 1.1* false*///:~

6

//: StorageTest. java/*** Number of stored bytes * Created by wangchenlong on 15/7/6. */public class StorageTest {/*** number of bytes of the String * @ param s String * @ return number of bytes */public static int storage (String s) {return s. length () * 2;} public static void main (String [] args) {String s = "Caroline"; System. out. println (s + "bytes occupied:" + storage (s);}/*** Output: * Caroline bytes occupied: 16 *///:~}

7

//: IncrementableTest. java/*** static variable test * Created by wangchenlong on 15/7/6. */class StaticTest {static int I = 47;} class Incrementable {static void increment () {StaticTest. I ++ ;}} public class IncrementableTest {public static void main (String [] args) {Incrementable. increment (); System. out. println ("the number is changed to" + StaticTest. i) ;}}/*** output: * The number is 48 *///:~

8

//: OneStaticTest. java/*** static variable single instance test * Created by C. l. wang on 15/7/6. */public class OneStaticTest {public static void main (String [] args) {StaticTest s1 = new StaticTest (); StaticTest s2 = new StaticTest (); // noinspection AccessStaticViaInstance System. out. println ("s1. I =" + s1. I + ", s2. I =" + s2. I); Incrementable. increment (); // noinspection AccessStaticViaInstance System. out. println ("af Ter increment: "+" s1. I = "+ s1. I +", s2. I = "+ s2. I) ;}/ *** output: * s1. I = 47, s2. I = 47 * after increment: s1. I = 48, s2. I = 48 *///:~

9

//: AutoBoxTest. java/*** basic type and package type * Created by C. l. wang on 15/7/6. */public class AutoBoxTest {public static void main (String [] args) {boolean B = false; char c = 'X'; byte t = 8; short s = 16; int I = 32; long l = 64; float f = 0.32f; double d = 0.64; Boolean B = B; System. out. println ("boolean B =" + B); System. out. println ("Boolean B =" + B); Character C = c; System. out. println ("char c =" + C); System. out. println ("Character C =" + C); Byte T = t; System. out. println ("byte t =" + t); System. out. println ("Byte T =" + T); Short S = s; System. out. println ("short s =" + s); System. out. println ("Short S =" + S); Integer I = I; System. out. println ("int I =" + I); System. out. println ("Integer I =" + I); Long L = l; System. out. println ("long l =" + l); System. out. println ("Long L =" + L ); Float F = f; System. out. println ("float f =" + f); System. out. println ("Float F =" + F); Double D = d; System. out. println ("double d =" + d); System. out. println ("Double D =" + D) ;}}/*** Output :*... *///:~

10

//: CommentLineTest. java/*** command line parameter * Created by C. l. wang on 15/7/6. */public class CommandLineTest {public static void main (String [] args) {if (args. length! = 3) {System. out. println ("less than 3 parameters"); return;} String result = ""; for (String s: args) {result + = s + "";} System. out. println ("parameter:" + result) ;}}/*** Output: * parameter: caroline wendy girl *///:~

11

//: AllTheColorsOfTheRainbow/*** encoding style test * Created by C. l. wang on 15/7/6. */public class RainbowTest {public static void main (String [] args) {AllTheColorOfTheRainbow atc = new AllTheColorOfTheRainbow (); atc. changeTheHusOfTheColor (16); System. out. println ("theHueOfTheColor =" + atc. theHueOfTheColor); System. out. println ("anIntegerRepresentingColors =" + atc. changeAnIntegerRepresentingColors (32 ));} } Class Identifier {int identifier; int theHueOfTheColor; void changeTheHusOfTheColor (int newHue) {theHueOfTheColor = newHue;} int identifier (int theHueOfTheColor) {return identifier = theHueOfTheColor ;}} /*** Output: * theHueOfTheColor = 16 * anIntegerRepresentingColors = 32 *///:~

12 & 13 & 14 & 15

Reference: http://blog.csdn.net/caroline_wendy/article/details/46779719

Copyright Disclaimer: This article is an original article by the blogger and cannot be reproduced without the permission of the blogger.