Java-thinking in Java Chapter 2nd Practice

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 =NewDefaultinit (); 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//Turn The DataOnly code fragments into a program that compiles and runsClass DataOnly {intIDoubleDBooleanbvoidShow () {System.out.println (i);      System.out.println (d);  System.out.println (b); }} Public  class dataonlytest {   Public Static void Main(string[] args) {DataOnly data =NewDataOnly (); DATA.I = -; DATA.D =1.1; DATA.B =false;  Data.show (); }}/*** output:* 47* 1.1* false*///:~

6

//: Storagetest.java/** * Storage bytes * Created by Wangchenlong on 15/7/6. * * Public  class storagetest {    /** * Number of bytes in String * @param s String * @return bytes * *     Public Static int Storage(String s) {returnS.length () *2; } Public Static void Main(string[] args) {String s ="Caroline"; SYSTEM.OUT.PRINTLN (S +"number of bytes occupied:"+ Storage (s)); }/** * Output: * Caroline bytes Occupied://:~}

7

//: Incrementabletest.java/** * Static variable Test * Created by Wangchenlong on 15/7/6. * *Class Statictest {Static inti = -;} Class Incrementable {Static voidIncrement () {statictest.i++; }} Public  class incrementabletest {     Public Static void Main(string[] args)        {incrementable.increment (); System.out.println ("number becomes"+ statictest.i); }}/** * Output: * number changed to * *//:~

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 =NewStatictest (); Statictest s2 =NewStatictest ();//noinspection accessstaticviainstanceSystem.out.println ("s1.i ="+ s1.i +", s2.i ="+ s2.i); Incrementable.increment ();//noinspection accessstaticviainstanceSystem.out.println ("after increment:"+"s1.i ="+ s1.i +", s2.i ="+ s2.i); }}/** * Output: * s1.i = +, s2.i = * after increment:s1.i = $, s2.i = *///:~

9

//: Autoboxtest.java/** * Basic type and wrapper type * Created by C.l.wang on 15/7/6. * * Public  class autoboxtest {     Public Static void Main(string[] args) {Booleanb =false;Charc =' x ';bytet =8; Shorts = -;inti = +;LongL = -;floatf =0.32FDoubleD =0.64;        Boolean B = b; System.out.println ("Boolean b ="+ b); System.out.println ("Boolean B =", e);        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 =", s);        Short S = s; System.out.println ("Short s =", T); System.out.println ("Short S =", t);        Integer i = i; System.out.println ("int i ="+ i); System.out.println ("Integer I =", n);        Long L = l; System.out.println ("Long L =", K); System.out.println ("Long L ="+ L);        Float f = f; System.out.println ("Float f ="+ f); System.out.println ("Float F =", a);        Double d = d; System.out.println ("Double d ="+ D); System.out.println ("Double D =", c); }}/** * Output: * ... * *//:~

10

//: Commentlinetest.java/** * command Line Parameters * 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; The String result =""; for(String S:args) {result + = s +" "; } System.out.println ("Parameters:"+ result); }}/** * Output: * parameter: Caroline Wendy girl *///:~

11

//:allthecolorsoftherainbow/** * Coded style test * Created by C.l.wang on 15/7/6. * * Public  class rainbowtest {     Public Static void Main(string[] args) {Allthecoloroftherainbow ATC =NewAllthecoloroftherainbow (); Atc.changethehusofthecolor ( -); System.out.println ("Thehueofthecolor ="+ Atc.thehueofthecolor); System.out.println ("anintegerrepresentingcolors ="+ Atc.changeanintegerrepresentingcolors ( +)); }}class Allthecoloroftherainbow {intAnintegerrepresentingcolors;intThehueofthecolor;voidChangethehusofthecolor (intNewhue) {thehueofthecolor = Newhue; }intChangeanintegerrepresentingcolors (intThehueofthecolor) {returnAnintegerrepresentingcolors = Thehueofthecolor; }}/** * Output: * Thehueofthecolor = * Anintegerrepresentingcolors = * *//:~

12&13&14&15

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

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Java-thinking in Java Chapter 2nd Practice