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Java This will produce the following result: 15 When x is assigned an integer value, the compiler boxes the integer because x is integer object. Later, x is unboxed so that they can be added as an integer. Number Methods Following is the list of the instance methods that all the subclasses of the Number class implements: Sr. No. Methods with Description 1 xxxValue() Converts the value of this Number object to the xxx data type and returns it. 2 compareTo() Compares this Number object to the argument. 3 equals() Determines whether this number object is equal to the argument. 4 valueOf() Returns an Integer object holding the value of the specified primitive. 5 toString() Returns a String object representing the value of a specified int or Integer. 6 parseInt() This method is used to get the primitive data type of a certain String. 7 abs() Returns the absolute value of the argument. 83
Java ceil() 8 Returns the smallest integer that is greater than or equal to the argument. Returned as a double. floor() 9 Returns the largest integer that is less than or equal to the argument. Returned as a double. rint() 10 Returns the integer that is closest in value to the argument. Returned as a double. round() 11 Returns the closest long or int, as indicated by the method's return type to the argument. 12 min() Returns the smaller of the two arguments. 13 max() Returns the larger of the two arguments. 14 exp() Returns the base of the natural logarithms, e, to the power of the argument. 15 log() Returns the natural logarithm of the argument. pow() 16 Returns the value of the first argument raised to the power of the second argument. 84
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Java About the Tutorial Java is a h
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Java 5. Java - Basic Datatypes ....
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Java Java - String Buffer delete()
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Java File Class ...................
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Java The Dictionary Class .........
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Java - Basics
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Java Distributed: Java is designe
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2. Java - Environment Setup Java In
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3. Java - Basic Syntax Java When we
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Java Java Identifiers All Java comp
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Java class const continue default d
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4. Java - Objects & Classes Java Ja
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Java Each time a new object is crea
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Java This will produce the followin
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Java Example This example explains
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Java Import Statements In Java if a
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Java Now, compile both the classes
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Java Example: short s = 10000, sho
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Java Prefix 0 is used to indicate o
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6. Java - Variable Types Java A var
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Page 44 and 45: Java This will produce the followin
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Java Parameters Here is the detail
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Java 11 void setLength(int newLengt
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Java Using String's static format()
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Java 15 int hashCode() Returns a ha
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Java 35 boolean startsWith(String p
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Java Java - String compareTo(Object
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Java } } result = str3.compareTo( s
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Java Example public class Test { }
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Java Example public class Test { pu
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Java Example public class Test{ pub
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Java Parameters Here is the detail
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Java } } }catch( Exception ex){ } S
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Java Example import java.io.*; publ
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Java fromIndex -- the index to sta
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Java Return Value Example This met
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Java System.out.println(Str1.region
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Java Java - String replace() Method
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Java Java - String replaceFirst() M
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Java } } System.out.println(retval)
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Java } } System.out.println(retval)
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Java } } System.out.println(Str.sta
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Java Syntax Here is the syntax of t
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Java Java - String toLowerCase() Me
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Java Java - String toString() Metho
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Java Syntax Here is the syntax of t
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Java valueOf(char[] data, int
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Java The above statement does two t
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Java The foreach Loops JDK 1.5 intr
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Java public static void fill(int[]
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Java 5 int compareTo(Object obj) Op
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Java Simple DateFormat Format Codes
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Java } } // display time and date u
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Java I Two-digit hour (with leading
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Java } } } catch (Exception e) { }
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Java 5 GregorianCalendar(Locale aLo
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Java void roll(int field, boolean u
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Java Example Following example illu
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Java re? Matches 0 or 1 occurrence
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Java Methods of the Matcher Class H
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Java The start and end Methods Foll
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Java } } System.out.println("lookin
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Java PatternSyntaxException Class M
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Java Parameter List: The list of
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Java Example public class ExampleVo
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Java Example The following program
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Java } } You will need to call a co
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Java this(); } //Assigning the loca
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Java } } System.out.println("The ma
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Java out = new FileOutputStream("ou
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Java Standard Streams All the progr
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Java The two important streams are
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Java This method reads upto len num
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Java DataInputStream The DataInputS
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Java FileOutputStream FileOutputStr
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Java public String toString() 3 Con
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Java DataOutputStream The DataOutpu
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Java Example Following is the examp
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Java 3 public File getParentFile()
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Java 18 public String[] list(Filena
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Java Example Following is an exampl
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Java Writes a portion of an array o
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Java Listing Directories You can us
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Java If you try to compile the abov
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Java IllegalMonitorStateException I
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Java Catching Exceptions A method c
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Java return -1; }catch(FileNotFound
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Java Example public class ExcepTest
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Java try(FileReader fr=new FileRead
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Java To demonstrate using our user-
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Java Sorry, but you are short $200.
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Java Inner Classes (Non-static Nest
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Java } } Outer_Demo.Inner_Demo inne
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Java Anonymous Inner Class as Argum
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Java 297
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Java Java - Object Oriented 299
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Java Copy and paste the following p
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Java Differentiating the Members If
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Java Invoking Superclass Constructo
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Java Now, if we consider the IS-A r
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22. Java - Overriding Java In the p
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Java } } b.bark(); This will produc
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23. Java - Polymorphism Java Polymo
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Java } public void setAddress(Strin
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Java mailCheck() on e is quite diff
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Java { System.out.println("Construc
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Java Inheriting the Abstract Class
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Java You have to place the abstr
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Java public void setAge( int newAge
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26. Java - Interfaces Java An inter
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Java A class uses the implements ke
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Java The Hockey interface has four
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Java Following package example cont
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Java What happens if the Employee c
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Java Like the .java source files, t
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28. Java - Data Structures Java The
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Java 10 void flip(int startIndex, i
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Java // set some bits for(int i=0;
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Java This constructor accepts an ar
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Java 17 Object get(int index) Retur
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Java 36 void setSize(int newSize) S
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Java static void showpop(Stack st)
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Java boolean isEmpty( ) 3 Returns t
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Java Object put(Object k, Object v)
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Java Hashtable(int size, float fill
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Java Apart from the methods defined
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Java The Collection Interfaces The
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Java boolean equals(Object obj) 6 7
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Java } } //HashMap Map m1 = new Has
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Java Example The above interface ha
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Java Example Set has its implementa
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Java Example SortedSet have its imp
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Java 7 8 int hashCode( ) Returns th
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Java Example SortedMap has its impl
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Java } } Vector dayNames = new Vect
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Java 10 AbstractMap Implements most
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Java Object get(int index) 10 Retur
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Java // remove elements from the li
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Java 6 Object clone() Returns a sha
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Java } } // display the array list
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Java 5 6 7 8 boolean isEmpty() Retu
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Java LinkedHashSet hs = new LinkedH
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Java 11 12 13 Object last() Returns
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Java 3 4 5 boolean containsKey(Obje
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Java 14 15 Object remove(Object key
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Java Following is the list of const
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Java } }; Thread t = new Thread(run
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Java // Put elements to the map lhm
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Java Apart from the methods inherit
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Java } } } System.out.println(); //
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Java 4 Vector(Collection c) Creates
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Java 24 int lastIndexOf(Object elem
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Java v.addElement(new Integer(4));
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Java 4 Enumeration keys( ) Returns
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Java 13 int size( ) Returns the num
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Java boolean containsKey(Object key
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Java Set states; String str; capita
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Java boolean equals(Object bitSet)
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Java System.out.println("Initial pa
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Java 5 static void fill(List list,
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Java 30 31 32 33 34 35 36 37 static
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Java How to Use an Iterator ? Often
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Java int previousIndex( ) 7 Returns
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Java public class Example{ public s
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Java Example Following example illu
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Java return max; // returns the lar
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31. Java - Serialization Java Java
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Java } } System.out.printf("Seriali
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32. Java - Networking Java The term
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Java Returns the port of the URL. 5
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Java URLConnections Class Methods T
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Java } { } try { URL url = new URL(
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Java ServerSocket Class Methods The
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Java public Socket() 5 Creates an u
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Java { String serverName = args[0];
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Java } { System.out.println("Socket
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Java // Get system properties Prope
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Java // Assuming you are sending em
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Java try{ // Create a default MimeM
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34. Java - Multithreading Java Java
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Java void start( ); Example Here is
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Java Step 1 You will need to overri
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Java Thread: Thread-2, 2 Thread: Th
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Java Example The following ThreadCl
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Java System.out.println("Starting t
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Java Multithreading Example without
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Java Counter --- 3 Counter --- 2 Co
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Java This produces the same result
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Java public T1(Chat m1) { this.m =
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Java } synchronized (Lock2) { Syste
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Java } } } } synchronized (Lock2) {
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Java } } catch (InterruptedExceptio
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Java Thread: Thread-2, 7 Suspending
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Java destroy: This method is only
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Java Example HTML applet Tag
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Java Not valid in base, br, frame,
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Java onresize onstorage onundo onun
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Java Media Events Following tags ha
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Java Getting Applet Parameters The
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Java Following are the specific ste
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Java public void mouseExited(MouseE
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Java Playing Audio An applet can pl
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36. Java - Documentation Comments J
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Java @exception Adds a Throws subhe
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Java /** * This is the main method
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