java_Java编程经典.pdf

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1、 Java?Java Java?2010?Java?Java?1?Java?2?Java?3?4?Java Applet?5?Java?6?Java?7?8?9?Java?10?Java?(?11?Java?)?(?12?Java?)?13?Servlet?XML?14?Java?Java?1?Java?1.1 Java?1.2 Java?1.3 Java?1.4 JDK?1.5 Java?1.6?Java?1.1 Java?Java?Java?Java?1.2 Java?1.?Java?Java?Java?Java?Java?Java?Java?Java?2.?Java?Java?3.?Ja

2、va?Java?Java?Java?Java?Java?4.?Java?Java?5.?Java?Java?1.3 Java?1.?Java?GUI?Java?Java?2.Servlets?Java?3.Applets?Applets?HTML?Java?HTML?Applets?Java?1.4 JDK?Java Develop Kit?JDK?Sun?Sun?http:/?JDK?1.02?1.4?Java?JDK?j2sdk-1_4_0_012-windows-i586.exe?C:j2sdk1.4.0_01?D:j2sdk1.4.0_01?Java?1.5 Java?JDK?“?”?

3、“?”?“?”?“?”?“?”?1.1?Java?1.1“?”?Java?“?”?1.2?include?lib?path?JDK?Java?1.2“?”?Java?include?“?”?“?”?1.3?“;D:j2sdk1.4.0_01include”?“;”?JDK?include?1.3?include?Java?1.3?include?Java?lib?“?”?“?”?1.4?“;D:j2sdk1.4.0_01lib”?“;”?JDK?lib?1.4?lib?Java?1.4?lib?Java?path?“?”?“?”?1.5?“;D:j2sdk1.4.0_01bin”?“;”?JD

4、K?bin?1.5?path?Java?1.5?path?Java?1.6?1.1?HelloWorld.java?“Hello World”?/?HelloWorld.java public class HelloWorld public static void main(String args)System.out.println(Hello World);Java?EditPlus?HelloWorld.java?EditPlus?“?”?1.6?“E:_WorkJavasample”?“javac HelloWorld.java”?1.6?HelloWorld.class?.class

5、?“java HelloWorld”?“Hello World”?1.7?Java?1.6?HelloWorld Java?1.7?HelloWorld?Java?Javac?Java?JDK?JDK?bin?javac.exe?.class?Java.exe?Java?Java?1.2?“Hello World?”?1.8?/?HelloApplet.java import java.awt.Graphics;import java.applet.Applet;public class HelloApplet extends Applet public void paint(Graphics

6、 g)g.drawString(Hello World!,50,25);Java?HTML?Java?HelloApplet will appear below in a Java enabled browser.Java?1.8 Applet?“Hello World?”Java?1.?Java?2.?Java?3.?Java?4.?“?Java?”?5.?Applet?“?Java?”?Java?2?Java?2.1 Java?2.2?2.3?2.4?2.5?Java?2.1 Java?2.1.1?Java?1.?JDK?Java?2.?Java?Java?main?Applet?Appl

7、et?Java?“”?“”?Java?2.1?Applet?HTML?appletviewer?“XXX?Java?”?2.1?/?WelcomeApplet.java?import java.applet.*;?import java.awt.*;?import java.awt.event.*;?public class WelcomeApplet extends Applet implements ActionListener?Java?Label lblName;?TextField txtName;?TextField txtDisp;?public void init()?lblN

8、ame=new Label(?);?txtName=new TextField(8);?txtDisp=new TextField(20);?init?add(lblName);?add(txtName);?add(txtDisp);?txtName.addActionListener(this);?Java?public void actionPerformed(ActionEvent e)?actionPerformed txtDisp.setText(txtName.getText()+?Java?);?Java?public static void main(String args)?

9、Frame f=new Frame(?);?f.addWindowListener(new WindowAdapter()?public void windowClosing(WindowEvent evt)?System.exit(0);?main?;?WelcomeApplet a=new WelcomeApplet();?a.init();?f.add(Center,a);?f.setSize(400,300);?f.show();?a.start();?Java?2.1?Java?2.1.2?Java?(1)?“;”?(2)?(3)?Java?Java?1.1?Label lblNam

10、e;TextField txtName;TextField txtDisp;?lblName=new Label(?);txtName=new TextField(8);txtDisp=new TextField(20);add(lblName);add(txtName);add(txtDisp);txtName.addActionListener(this);?Java?2.1.3?/?/*?*/?Java?/?WelcomeApplet.java?/*?WelcomeApplet.java*/?/*?WelcomeApplet.java*/Java?2.1.4?Java?(1)?(_)?(

11、$)?(2)?(3)Java?(4)?(5)?Java?Java?public?double?()?2.1?Java?2.1?b t n f r?Tab?Java?2.2?2.2.1?Java?(?2.2)?(byte?short?int?long)?(char)?(double?float)?(boolean)?Java?2.2 Java?byte short int long char float double boolean?8 16 32 64 16 32 64 8?0 0 0 0?u 0000?0.0F 0.0D False?7 7-2?2-1 15 15-2?2-1 31 31-2

12、?2-1 63 63-2?2-1 2 2 1?u 0000?u FFFF?True?False?Java?1.?(1)?2?2?077?0?0 xBAAC?0 x?(2)?int?(3)?“L”?“l”?long?(4)?Java?Java?2.?(1)?16 bit Unicode?(2)?()?(3)?a?t-?u?-?Unicode?Java?3.?double?F?f(float)?D?d(double)?Java?4.?boolean?true?false?boolean flag=true;?flag?boolean?true?Java?2.2.2?=3.1415?Java?pi?

13、s1?i1?l1?ch1?f1?d1?b1?change?main?s2?i2?l2?ch2?f2?d2?b2?main?main?2.2?2.2?/?SetVariable.java public class SetVariable /?Java?static double pi=3.141592654?/?static short s1;static int i1;static long l1;static char ch1;static float f1;static double d1;static boolean b1;public static void main(String a

14、rgs)Java?/?short s2=35;int i2=-32;long l2=34555L;char ch2=A;float f2=897.89F;double d2=34.345;boolean b2=false;/?System.out.println(?pi=+pi);/?Java?System.out.println(*?*);System.out.println(?s2=+s2);System.out.println(?i2=+i2);System.out.println(?l2=+l2);System.out.println(?ch2=+ch2);System.out.pri

15、ntln(?f2=+f2);System.out.println(?d2=+d2);System.out.println(?b2=+b2);/?Java?change();/?System.out.println(*?*);System.out.println(?s1=+s1);System.out.println(?i1=+i1);System.out.println(?l1=+l1);System.out.println(?ch1=+ch1);System.out.println(?f1=+f1);System.out.println(?d1=+d1);System.out.println

16、(?b1=+b1);Java?/?public static void change()s1=125;i1=88;l1=987654321L;ch1=B;f1=3.2590F;d1=-1.04E-5;b1=true;Java?2.2?Java?2.3?Java?Java?2.3.1?Java?+*/%+-?(?)?Java?2.3?2.3?/?NumberOper.java public class NumberOper public static void main(String args)/?int a=30;int b=20;/?int r1,r2,r3,r4,r5,r6,r7,r8,r

17、9;/?r1=a+b;Java?r2=a-b;r3=a*b;r4=a/b;r5=a%b;r6=a+;r7=b-;r8=+a;r9=-b;/?System.out.println(a=+a+b=+b);/a,b?System.out.println(a+b=+r1);System.out.println(a-b=+r2);Java?System.out.println(a*b=+r3);System.out.println(a/b=+r4);System.out.println(a%b=+r5);System.out.println(a+=+r6);System.out.println(b-=+

18、r7);System.out.println(+a=+r8);System.out.println(-b=+r9);Java?2.3?Java?2.3.2?“?”?“?”?Java?=!=b;r4=a=b;r6=a b=+r3);System.out.println(a=b=+r5);System.out.println(a=b=+r6);Java?2.4?Java?2.3.3?2.3?!&|&|?!a a&b a|b a b a&b a|b?a?a?a?b?a?b?a?b?a?b?a?b?a?b?a?b?a?b?a?b?a?b?Java?2.3?Boolean a=false;Boolean

19、 b=true;a&b?a?b?b|a?b?a?Java?2.5?2.5?/?TestLogic.java public class TestLogic public static void main(String args)/?boolean a=false;boolean b=true;/?boolean r1,r2,r3,r4,r5,r6;/?Java?r1=!a;r2=a&b;r3=a|b;r4=a b;r5=a&b;r6=a|b;/?System.out.println(a=+a+b=+b);System.out.println(!a=+r1);System.out.println(

20、a&b=+r2);System.out.println(a|b=+r3);System.out.println(ab=+r4);System.out.println(a&b=+r5);System.out.println(a|b=+r6);Java?2.5?Java?2.3.4?Java?&|?xa?x?2?a?x?2.6?/?TestBit.java public class TestBit public static void main(String args)/?int a=36;int b=2;/?int r1,r2;Java?/?r1=a b;r2=a b=+r1);System.o

21、ut.println(ab=+r2);Java?2.6?Java?2.3.5?“=”?“=”?2.4?Java?Java?2.4?+=?a+=b a?=b a*=b a/=b a%=b a&=b a|=b a=b a=b a=b?a=a+b a=a-b a=a*b a=a/b a=a%b a=a&b a=a|b a=a b a=a b a=a b -=*=/=%=&=|=Java?2.3.6?(?:)?x?y:z?x?y?z?int x=5;int a=(x3)?5:3;?a?5?x=2?a?3?Java?(instanceof)?(true)?(false)?boolean b=userOb

22、ject instanceof Applet?userObject?Applet?Java?2.3.7?2.5?1 2 3 4 5 6 7 8 9 10 11 12 13 14?+*/()%;,?!(?)*?*?*?-+-+=instanceof=!=&|&|?:=*=/=%=+=?=&=|=Java?2.4?(if-else?)?(switch?)?(for?)?(while?)?Java?2.4.1?1.if-else?if-else?if(?)?1;else?2;Java?(1)?true?false?(2)?true?1?if-else?(3)?false?1?else?2?Java?

23、2.7?if-else?x10?x?x=10?2.7?/?TestIf.java public class TestIf /?x static int x;public static void main(String args)x=12;if(x10)Java?System.out.println(x=+x+?);else System.out.println(x=10+?);change();System.out.println(?x?);if(x10)System.out.println(x=+x+?);else System.out.println(x=10+?);Java?/chang

24、e?x?public static void change()x=5;Java?2.7?Java?2.switch?switch?switch(?1)case?2:?2;break;case case?3:3:?3;break;case?4:?4;break;default:?5;break;Java?(1)?1?(2)?case?(3)?2?3?4?(4)?case?(5)?break?Java?2.8?switch?x=1?2?3?1?2?3?x?x?2.8?/?TestSwitch.java public class TestSwitch public static void main(

25、String args)/?x int x;x=12;Java?System.out.println(x=12?);choose(x);x=3;System.out.println(x=3?);choose(x);/choose?switch?public static void choose(int x)switch(x)Java?case 1:System.out.println(1);break;case 2:System.out.println(2);break;case 3:System.out.println(3);break;default:System.out.println(

26、x);Java?2.8?Java?2.4.2 for?for?for(?;?;?)?;Java?(1)?(2)?true?false?for?(3)?Java?2.9?for?1?100(?100)?2.9?/?TestFor.java public class TestFor public static void main(String args)int sum=0;for(int i=1;i=100;i+)sum+=i;System.out.println(1?100(?100)?+sum);Java?2.9?Java?2.4.3 while?while?while(?)?;?true?w

27、hile?Java?for?while?int sum=0;int i=1;while(i=100)sum+=i;i+;System.out.println(1?100(?100)?+sum);Java?2.4.4 do?do?do?;while(?)Java?while?true?while?do?do?int sum=0;int i=1;do sum+=i;i+;while(i=100);System.out.println(1?100(?100)?+sum);Java?2.5?2.5.1?(1)?(2)?(3)?0?Java?int a?/?a pencil b?/?pencil?b J

28、ava?2.5.2?new?a=new int10?/?10?a b=new pencil20?/?20?pencil?b?a?0?Java?Java?(1)?a0=5;a1=4;a9=10;(2)?int a=4,5,1,3,4,20,2;?7?Java?2.10?2.10?/?TestArray.java public class TestArray public static void main(String args)/?int a;char b;/?Java?a=new int3;b=new char2;/?for(int i=0;i3;i+)ai=i*3;b0=a;b1=b;/?i

29、nt c=0,1*3,2*3;/?System.out.print(?an);Java?for(int i=0;i2;i+)System.out.print(bi+);System.out.print(n?cn);for(int i=0;i3;i+)System.out.print(ci+);Java?2.10?Java?1.?(1)3+42*4&488/4+2(2)abc&123|82(4)2*4&02|4%2 2.?1001?1002?2001?3001?2.11?Java?2.11?2.2?Java?3.?90?“?XXXX?”?80?90?“?XXXX?”?70?80?“?XXXX?”

30、?60?70?“?XXXX?”?60?“?XXXX?”?4.?Java?3?3.1?3.2?3.3?Java?3.1?3.1.1?Java?3.1?apple?SetApple?3.1?Java?/?SetApple.java public class SetApple public static void main(String args)apple a=new apple();/?apple?a.appleweight=0.5;/?System.out.println(?1?);System.out.println(a.bite();/?a.appleweight=5;System.out

31、.println(?5?);System.out.println(a.bite();Java?/?class apple /?long applecolor;/?double appleweight;/?boolean eatup;/?/?public boolean bite()if(appleweight5000)str=?:+name+else str=?:+name+Salary:?5000;Salary:+salary;Java?return str;class Employee public String name;/?public int salary;/?public stat

32、ic String getSalary(String name,int salary)String str;str=?:+name+return str;Salary:+salary;Java?public static String getSalary2(String name,int salary)String str;str=?:+name+return str;Salary:+salary;Java?Employee?getSalary?getSalary2?TextExtend?getSalary?5000?“?5000”?getSalary2?3.2?Java?3.2?Java?3

33、.1.3?super?this?1.super?extends?super?3.3?super?3.3?/?UseSuper.java public class UseSuper Java?public static void main(String args)Manager m=new Manager();m.name=?;m.salary=10000;m.department=?;System.out.println(m.getSalary();class Employee Java?public String name;/?public int salary;/?/?public Str

34、ing getSalary()String str;str=?:+name+nSalary:+salary;return str;class Manager extends Employee Java?public String department;/?/?public String getSalary()/?super?return super.getSalary()+nDepartment:+department;Java?3.3?super?Java?2.this this?str=?:+name+nSalary:+salary;?str=?:+this.name+nSalary:+t

35、his.salary;?Java?this?Day d=new Day(this);Java?3.1.4?3.4?3.3?3.3?/?UseConstruct.java public class UseConstruct public static void main(String args)Java?Manager m=new Manager(?,10000,?);/?System.out.println(m.getSalary();class Employee private String name;/?private int salary;/?/?public Employee(Stri

36、ng _name,int _salary)Java?name=_name;salary=_salary;public String getSalary()String str;str=?:+name+nSalary:+salary;return str;class Manager extends Employee private String department;Java?/?public Manager(String _name,int _salary,String _department)super(_name,_salary);department=_department;public

37、 String getSalary()return super.getSalary()+nDepartment:+department;Java?3.1.5?Java?Company?Employee(?)?Manager(?)?Department(?)?Package?;Java?Package?(1)Package?(2)?(3)?import?import?import?.?import?(.)?Java?3.5?Company?Manager.java?/?Manager.java package Company;/?Company class Employee public Str

38、ing name;/?public int salary;/?public String getSalary()Java?String str;str=?:+name+nSalary:+salary;return str;public class Manager extends Employee public String department;/?public String getSalary()return super.getSalary()+nDepartment:+department;Java?Manager.class?UsePackage.java?/?UsePackage.ja

39、va import Company.Manager;/?public class UsePackage public static void main(String args)Manager m=new Manager();m.name=?;m.salary=10000;m.department=?;System.out.println(m.getSalary();Java?3.4?3.4?Company?Manager.java?UsePackage.java?UsePackage?Java?3.4?Java?3.2?Java?(1)?(2)?public interface?extends

40、?Java?3.6?Product.java?/?Product.java public interface Product static final String MAKER=?;static final String ADDRESS=?;public int getPrice();Java?/?UseInterface.java public class UseInterface public static void main(String args)Computer p=new Computer();System.out.print(p.ADDRESS+p.MAKER);System.o

41、ut.println(?+p.getPrice()+?);Java?class Computer implements Product public int getPrice()return 1;Java?“javac Product.java”?“javac.UseInterface.java”?“java UseInterface”?3.5?3.5?Java?3.3?3.3.1 Vector?Vector?(1)?Vector?(2)Vector?Vector?public Vector();?Vector?Java?public Vector(int initialCapacity);?

42、initialCapacity?Vector?public Vector(int initialCapacity,int capacityIncrement);?initialCapacity?Vector?capacityIncrement?Java?(1)Vector?public void add(int index,Object element)?index?element?public boolean add(Object o)?Vector?o?public Object remove(int index)?index?Java?(2)Vector?public Object ge

43、t(int index)?index?public Object set(int index,Object element)?index?element?Java?(3)?public String toString()?public int size()?Java?3.7?Vector?3.6?/?UseVector.java import java.util.Vector;/?JDK?Vector?public class UseVector public static void main(String args)Java?Vector vScore=new Vector();vScore

44、.add(86);/?vScore.add(98);/?vScore.add(1,99);/?/?for(int I=0;I vScore.size();I+)System.out.print(vScore.get(i)+);vScore.set(1,77);/?vScore.remove(0);/?Java?System.out.println(?n?);for(int I=0;I vScore.size();I+)System.out.print(vScore.get(i)+);System.out.println(n?n+vScore.toString();Java?3.6?Vector

45、?Java?3.3.2 Hashtable?Hashtable?-?Hashtable?public Hashtable()?public Hashtable(int initialCapacity)?initialCapacity?public int size()Java?public Object remove(Object key)?key?value?public Object put(Object key,Object value)?key?value?public Object get(Object key)?key?public String toString()?Java?3

46、.8?Hashtable?3.7?/?UseHashtable.java import java.util.Hashtable;public class UseHashtable public static void main(String args)Hashtable hScore=new Hashtable();hScore.put(?,86);Java?hScore.put(?,98);hScore.put(?,99);System.out.println(?+hScore.toString();hScore.put(?,77);hScore.remove(?);System.out.p

47、rintln(?);System.out.println(?+hScore.toString();Java?3.7?Hashtable?Java?3.3.3 Enumeration?Enumeration?nextElement()?public boolean hasMoreElements()?public Object nextElement()?Enumeration?Vector?Hashtable?Vector?Hashtable?for(Enumeration e=v.elements();e.hasMoreElements();)System.out.println(e.nex

48、tElement();Java?3.9?Enumeration?Vector?Hashtable?3.8?/?UseEnumeration.java import java.util.*;public class UseEnumeration public static void main(String args)Vector vScore=new Vector();vScore.add(86);vScore.add(98);Java?vScore.add(1,99);System.out.println(Vector?+vScore.toString();for(Enumeration e=

49、vScore.elements();e.hasMoreElements();)System.out.println(e.nextElement();Hashtable hScore=new Hashtable();hScore.put(?,86);hScore.put(?,98);hScore.put(?,99);System.out.println(Hashtable?+hScore.toString();Java?for(Enumeration e=hScore.keys();e.hasMoreElements();)String str=(String)e.nextElement();S

50、ystem.out.print(str+?);System.out.println(hScore.get(str);Java?3.8?Enumeration?Java?3.3.4 Date?Date?public Date()?public String toString()?public long getTime()?Java?3.10?(?)?3.9?/?UseDate.java import java.util.Date;public class UseDate public static void main(String args)Date dOld=new Date();long l