COMPLETE JAVA NOTES KARTHIKEYAN NOTES JAVA SYLLABUS 45 Hours Class: 1 1 Introduction of Java language 2 Data types 3 Access specifies 4 Difference between class and methods 5 Conversion or Wrapper classes 6 Basic Programs Class: 2 7 Operators 8 If Condition 9 For Loop 10While 11Do while 12Switch Class: 3 13Array Methods 14String Methods Class: 4 15Class and Object 16Calling method 17Method overloading THANKING YOU CREATED BY A.KARTHIKEYAN
Transcript
COMPLETE JAVA NOTES
KARTHIKEYAN NOTES
JAVA SYLLABUS 45 Hours Class: 1
1 Introduction of Java language2 Data types3 Access specifies4 Difference between class and methods5 Conversion or Wrapper classes6 Basic Programs
Class: 27 Operators8 If Condition9 For Loop10While 11Do while12Switch
Class: 313Array Methods14String Methods
Class: 415Class and Object16Calling method17Method overloading18Method overriding19Constructor20Finalize
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Class: 521Static method and Static members22This keyword23Final keyword24Super keyword
Way to set the java Path:Right click to My computer go to propertiesClick
Go to Environment variables Click
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Goto User variable for Administrator Click New Button
Then click Ok Ok Ok
Go to Dos command check the java path:Start Run Cmd Ok
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Class: 1
Introduction of Java language: Java developed by sun micro system corporation. Java is plat form software Java is a general purpose Java is a pure oops concept Object oriented language was developed by sun micro system of
USA in 1991 Originally it is called as OAK by James gosling, one of the
inventor of the language Java was designed for the development of software for
consumer electronics devices like microwave ovens and remote controls
In the year 1995 .OAK replaced as java then we used to Internet concept
Java is the platform independent language. (It means write once and run anywhere)
Here program name and class name are same Java is the first programming that is not tied to any particular
operating system Java is an Internet programming language Java is a case sensitive
Using software:1. Java any version2. Net bean 6.03. Eclipse 3.0
Java calling steps:Package ClassesMethods
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Java programs divided into 2 types:1. Application programming
That program is based on console-based runner2. Applet programming (used for internet concept)
That program is based on web design and development)
Features of Java1. Platform Independent2. Compiler and interpreter3. OOPs4. Security5. Portability6. Distributed application (RMI, Sockets)7. Multi threading programming
[<Access Specifies>]Public static void main (String arg[] ){
<Statements>;}
}
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PROGRAM EXECUTION:Start notepad type your programSave your program <file name>.java
To see output:Then go to DOS command compile the programThen run the java program in consoleStart RunCmd or command (Enter)Go to your Folder AreaCompileRun See output
Constants of System classesout for outputin for inputerr for errorexit for terminate the program execution
Notes:DataInputStream:Class are first sound letter start with capital letter and every sound also start with capital letter
parseInt():Methods are first sound letter start with small letter and other every sound also start with capital letter
readLine( ):Used to get input from user at run time
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Difference between C++ and JAVA:
C++ JAVA
Operating overloading NotSupports all kinds of
inheritanceOnly single, multi level others achieved by interface concept
Delete operator to destroy the resource
Not available
Support destructor methods There, finalize () is usedSupport pointers Not use
Friend function specifies Not useCout<< System.out.printlnCin>> d.readLine()
Java TypesJDK Java Development KitJVM Java Virtual MachineJSL Java Standard Library
Data types:
Data types ByteInt 4 bytesLong int 8 bytesChar 2 bytesFloat 8 bytesDouble 16 bytesString( S should be capital because default data type is string)
No need
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Access specifies:Public Call any wherePrivate Access within only the function not for other classesProtected only used for Inheritance ConceptPackage Used for calling package access
Basic Programs:Eg://To display my nameclass p1{
public static void main(String s[]){
System.out.print("karthikeyan");}
}Eg://Eg for Data typesclass p2{
public static void main(String arg[]){
int i=10;char c='z';double d=10.00;float f=10.50f;String s="karthikeyan";System.out.println("int value is:"+i);System.out.println("char value is:"+c);System.out.println("double value is:"+d);System.out.println("float value is:"+f);System.out.println("string value is:"+s);
}}
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Conversion or Wrapper classes:Used to convert data type from one data type to another data type
Data type ConversionInt Integer.parsInt(d.readLine());Char Char.parseChar(d.read());
Or(char)d.read();
Float Float .parseFloat(d.readLine( ));Double Double.parseDouble(d.readLine());String No need because default data type is String
Eg://Eg for character conversionimport java.io.*;class p4{
public static void main(String arg[])throws Exception{
char c;DataInputStream d=new DataInputStream(System.in);System.out.print("Enter any character:");c=(char)d.read();System.out.print("characater is:"+c);
}}
Exception:Some abnormal condition an error can be occurring to avoid this error we can use exception conceptEnd the main function use throws ExceptionUsing package import java.io.*;
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Class: 2
Operators:Operator is a Symbol, Which is used to do some arithmetic Operations
Operator Meaning> Greater Than< Lesser than>= Greater than or equal to<= Less than or equal to= = Equal to< > ,! = Not Equal t
Logical Operator:
Operator Meaning&& AND (Both condition True)|| OR (Any one condition True)! NOT
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Assignment Operator:
Operator Meaning+=-=*=/=
Unary Operator:
Operator Meaninga++ Post increment++a Pre Incrementa-- Post Decrement--a Pre Decrement
Conditional Operator:Conditional operator is used to check conditionSyntax:(<Condition>)? <True statement> : <false statement>;
Special Operator:
Operator Meaning{ Left Brace}
Right Brace
( Left Parenthesis) Right Parenthesis[ Left Square Bracket] Right Square Bracket
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Eg://Eg for Arithmetic operatorimport java.io.*;class p3{
public static void main(String arg[])throws Exception{
DataInputStream d= new DataInputStream(System.in);int a,b;System.out.print("Enter the a value:");a=Integer.parseInt(d.readLine());System.out.print("Enter the b value:");b=Integer.parseInt(d.readLine());System.out.println("Addition is:"+(a+b));System.out.println("Subtraction is:"+(a-b));System.out.println("Multiplication is:"+(a*b));System.out.println("Division is:"+(a/b));System.out.println("Modulus is:"+(a%b));
}}
If ConditionIf condition, Else if condition, Ladder If condition, Nested If condition
Syntax for if condition:If (<condition>){
< True statements>;}else{
< False statements>;}
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Eg://Eg for if conditionimport java.io.*;class p5{
public static String u,p;public static void main(String arg[])throws Exception{
DataInputStream d=new DataInputStream(System.in);System.out.print("Enter the user name:");u=d.readLine();System.out.print("Enter the password:");p=d.readLine(); if(u.equals("karthi")&&(p.equals("bss"))){
System.out.print("Login : SUCCESS");}else{
System.out.print("Login : FAILED");}
}}
For Loop:They have 3 function 1) starting value 2) condition 3) inc or Dec
Syntax for normal for loop:for (<variable name> = <starting >; <condition>; <Inc / Dec>){
<Statements>;.
}
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Eg://To display table format by using for loopimport java.io.*;class p6{
public static void main(String arg[])throws Exception{
int n,c,i;DataInputStream d=new DataInputStream(System.in);System.out.print("Enter which table u want::");n=Integer.parseInt(d.readLine());System.out.print("Enter how many number u want:");c=Integer.parseInt(d.readLine());for(i=1;i<=c;i++){
System.out.println(i+"*"+n+"="+(i*n));}
}}
While:
In while first they check condition after given true statements are executed
Syntax for while condition:While (<condition>){
< True statements>;...
}
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Eg://Eg for whileclass p7{
public static void main(String arg[]){
int i=1;System.out.println("Display odd number 1 to 10");do{
System.out.println(i);i=i+2;
}while(i<10);
}}
Do while:Do While first given statements are executed after they check conditionDo while statements end with semicolon
Syntax for do while condition:
do{
< True statements>;...
}While (<condition>);
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Eg://Eg for do whileclass p8{
public static void main(String args[]){
int i=1;do{
int j=i*5;System.out.println(i+"*5="+j);i++;
}while(i<=10);
}}
Switch:They check a condition by case formatCase should be end with colon not for semicolon
Syntax for switch:switch(<Exp>){
case <Exp1>:<Statements>;break;case <Exp2>:<Statements>;break;
.default:< default statements>;
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}
Eg://Eg for switchclass p9{
public static void main(String args[]){
int i=1;switch(i){
case 0:System.out.println("The case Zero");break;case 1:System.out.println("The case One");break;default:System.out.println("Default");break;
}}
}
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Class: 3Array Methods:Array means declare one variable store more than one value in same data type as in same variable name is called arrayThey are two types in Array:1) Single Dimensional Array2) Multi Dimensional Array
Syntax for single dimensional array:<Data type> <var1>[ ] = new <data type> [ <size> ];Syntax for Array initialization:<Data type> <var1> [ ] = {<values>};(Or)<Data type> [ ] <var1> = {<values>};Length:Used to find the Total size of arraySyntax for length:<Variable name>.length
Multi dimensional array:Multi dimensional array is mostly used for matrix addition or matrix Subtraction or matrix multiplication Syntax for Multi dimensional array:<Data type> <var1> [ ] [ ] = new <data type> [<size>] [<size>];
";String s4="KARTHIK";System.out.println("Upper case
is:"+s1.toUpperCase());System.out.println("Upper case
is:"+s2.toLowerCase());System.out.println("Length of s1 is:"+s1.length());System.out.println("s1 3 rd position char
is:"+s1.charAt(3));System.out.println("Substring of s1
is:"+s2.substring(2,4));System.out.println("s1 r position is:"+s1.indexOf('k'));System.out.println("s1 r position
is:"+s1.lastIndexOf('k'));//System.out.println("s1+s2 :"+concat(s1,s2));//System.out.println("starts with t
is:"+s1.startsWith('t'));//System.out.println("End with t is:"+s2.endsWith('Y'));System.out.println("Without removing space:"+s3);System.out.println("Removing space:"+s3.trim());if(s1.equalsIgnoreCase(s4)){
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System.out.println("s1 and s4 string are Equal");}else{
System.out.println("s1 and s4 string are Not Equal");
}}
}
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Class: 4Class and Object:Class means collections of methods & members or variablesAn object is an instance of a class which is used to access members of class
Calling Methods:Calling Methods are function that operate on instant of classes are which they are defined object can communicate with each other. Using methods & can call methods in other classes
Syntax for Function or methods Declaration:< Return type> <method name> ( ){
< Statements >;.
}
Argument methods:Functions have any argument that methods have argument methods
Syntax for Arguments:
< Object name>. < method name>(<type1>,<type2>);
Eg://Eg for Calling members and Argument methodsimport java.io.*;class demo{
public static String n,d;public static int s;public static void show(String a,String b,int c){
Method Overriding:Same method name and same types of arguments are called method overriding
Constructor:Constructor when and object is created for class it call automaticallyHere you don’t use return type in front of methods name
Rules of making constructor:Constructor method name must name must be same as class nameConstructor does not return any values. So we don’t use return typeConstructors have argumentsTypes of constructor:
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Default constructor or Empty constructorParameter constructor or Argument constructorHere we don’t use Copy constructor Default constructor or empty constructor:Constructor methods have without any argument is called default constructor or empty constructor
Argument constructor or parameter constructor: Constructor methods have any argument is called argument constructor or parameter constructor
Eg://Eg for Constructorclass demo{
public demo(){
System.out.println("This is empty constructor");}public demo(int x,float f,String s){
System.out.println("X value is:"+x);System.out.println("Float value is:"+f);System.out.println("String s value:"+s);
Finalize:Finalize method or function is contradiction (opposition) to the constructor methodThe finalize method is represented by the keyword “ finalize ”Syntax for finalize:Protected void finalize ( ){
<Statements>;}We use only Boolean data type to check either true or falseEg://Eg for finalize conceptclass demo{
public demo(){
System.out.println("Memory is allocated");}protected void finalize(){
System.out.println("Memory is deallocated");}
}class p18{
public static void main(String arg[]){
while(true){
demo s= new demo();}
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}}
Class: 5Static method and Static members:Static variable can be initializing only onceAll objects that are initialized zero automatically share static membersStatic method only allows a static member or static variablesStatic methods are called without making objectWithout using object we can call function by using static keyword
Class: 6Abstract Class:Abstract class is an incomplete class.It is an collection of abstract behaviors of its sub classesInstance cannot be created using abstract class.Sub classes can in heritance variables & methods from them.Classes that cannot be instantiated directly Abstract classes exist.
Syntax for Abstract Class:abstract class < class name 1>{
abstract <return type > <method name 1>( );//Concrete methods are still allocated in abstract classes
Interface:Interface is a collection of abstract behaviors that individual classes can implementsInterface designed to support dynamic method (random methods) or to access same name methods
Notes:Implements are a keyword that used for implementing an interface a class
Syntax for interface:[<Access specifies>] interface <interface name>{
Inheritance:Creating a new class from an existing classNew class is called as derived or inherited class and the existing class is called as base or super classNotes:Here extends keyword is used to call base class to another derived class
Result s=new Result(); //Object creations. Get1(111);s.Get2(100,100);s.Disp();
}}
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Class: 7Package Creation:Packages are nothing but it is a “class – libraries”Packages are nothing but it is collection of methods and various classes.
Java Package Is 2 Types:1) Java Application Programming Interface Package (API Package)(Or) System Defined package2) User Defined Package
System Defined Packages:import java.lang.* Language Support classes automatically importedimport java.util.* date and time, Vector etcimport java.io.* Input/output Operationsimport java.applet.*Classes for creating and implementing appletsimport java.awt.* Set of classes implementing GUIimport java.net.* Classes for networking
Steps to create package:1) Create a new folder when it has same name of package name2) Here package name and folder name are same3) Include the package command, along with the package name as the first statements in the program name4) Write class declaration5) Save the file in package folder as “Name of class java”6) Set the class path = % class path% ; d:\<package name >7) Compile this file using javacSyntax for package creation:package <package name or folder name> .[<sub package name>];public class <class name >
Eg://To display package methodsimport device.*;public class p49{
public static void main(String arg[ ]){
input s = new input( );output d= new output( );s.show( );d.show( );
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}}
Exception Handling:Some abnormal conditions an error can be occur to avoid this error we can use Exception conceptThey are 5 types:
1) Try2) Catch3) Throw4) Throws 5) Finally
Here all are keywordsTWO BENEFITS:To allow you to fix the errorIt prevents the program from automatically terminatingSOME EXCEPTIONS ARE:
Exception Classes NamesMeaning
ArithmeticException Arithmetic error, such as divide by zero
IOException General problems during input and output operators
ArrayIndexOutOfBoundsException
When array index is out the given range
ArrayStoreExceptionAssignment to the array element
of an incompatible by array index
NullPointerExceptionInvalid use of null reference
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InterruptedIOExceptionOne thread has been interrupted
by another thread
FileNotFoundExceptionWhen a requested file is not
foundEOFException End of file reached exception
error
SQLExceptionWhen error occurs during a
database access
UnknownLostExceptionWhen the host cannot be located
NumberFormatExceptionWhen the string passes is not a
number
General syntax for try catch method:
try{
<Try block statements>;.
}catch( Exception <type1>){
<Exception handlers>;.
}catch( Exception <type2>){
<Exception handlers>;.
}finally{
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<Final statements>;}
Try & Catch modelWhenever there is a possibility of an exception being generated in a program. It is a better to handler it explicitlyImmediately the following try block include a catch clause that specifies the exception type that you using the catch
Syntax:try{
<Try block statements>;..
}catch( Exception <type1>){
<Exception handlers>;..
}
Multi catchMore than one catch could be single piece of code. To handle this type of situation you can specify are more than two catchesEach catching different types of Exception
Syntax:try{
<Try block statements>;
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.
.}catch( Exception <type1>){
<Exception handlers>;..
}catch( Exception <type2>){
<Exception handlers>;..
}
ThrowThrow is possible to throw an Exception explicitlyThey are two ways you can obtain a throwable object using a parameter into a catch clause, or creating one with the new operator
Syntax for throw:throw <throwable instance>;
Throws:Throws does not to handle exception using try-catch block. It can use the main( ) method is the program excepts the generation of arithmetic exception but does not want to handle try catch block.
Syntax:throws <Exception name>
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Eg://Eg for try catch methodimport java.io.*;public class p34{
public static int a,b,c;public static void main(String arg[ ]){try
{DataInputStream d= new DataInputStream(System.in);
System.out.println("Enter the a value:");a=Integer.parseInt(d.readLine());System.out.println("Enter the b value:");b=Integer.parseInt(d.readLine());c=a/b;System.out.println("Division of two number is:"+c);}catch(Exception e){System.out.println("You divided zero");}}
}
Eg://Eg for multicatch import java.io.*;class p36{
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public static int i,j=2,c,a[ ]=new int[5];public static void main(String arg[ ]){
Eg://Eg for throw Exceptionimport java.io.*;class p37{
public static void disp( ){
try
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{throw new NullPointerException("disp");}catch(NullPointerException e1){System.out.println(e1);throw( ); //Recall the methods.}
}public static void main(String arg[ ]){
try{
disp( );}catch(NullPointerException e2){
System.out.println(e2);}
}}
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Class: 8Date class:It contains a collection util Framework, collection classes Syntax for Date Class Declaration:GregorianCalendar <obj name>=new GregorianCalendar ();
<obj name>.get(Calendar.DAY_OF_MONTH) Display day of month<obj name>.get(Calendar.DAY_OF_YEAR) Display day of year<obj name>.get(Calendar.DAY_OF_WEEK) Display day of week<obj name>.get(Calendar.AM_PM) Display AM or PM<obj name>.get(Calendar.HOUR_OF_DAY) Display Hour of day
Eg:import java.util.*;public class d1{ public static void main(String s[]) { GregorianCalendar c=new GregorianCalendar();
Vector class:Vector is a dynamic arrayThat can be holding an object as any data type and any number
Syntax for vector class declaration:Vector <obj name> = new Vector(<size>);
SYNTAX METHODS NAME MEANING<obj name>.removeElementAt (<nth>); Remove the item stored
in the nth position<obj name>.addElementAt (<item>); Add the item specified to
the list at the end<obj name>.elementAt(<nth>); Used to find out the nth
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Element or object<obj name>.size( ); Find out the size of
vector<obj name>.removeElement(<item> ); Remove the item stored
in nth position in the list<obj name>.removeAllElements( ); Remove all Elements in
the list<obj name>.insertElementAt(<string>,<pos>);
Insert the string as given position
<obj name>.capacity(); Find out the capacity of vector
<obj name>.add(<string>) Add item to vector
Eg://Eg for vectorimport java.util.*;class v1{ public static void main(String ss[]) {
Vector v=new Vector(3); System.out.println("Capacity Of Vector:"+v.capacity()); System.out.println("size of Vector:"+v.size()); v.addElement("Apollo"); v.addElement("Rosi"); v.addElement("supria"); System.out.println("Capacity Of Vector:"+v.capacity()); System.out.println("size of Vector:"+v.size()); v.add("Saranya"); System.out.println("fourth element:"+v.elementAt(3)); System.out.println("Capacity Of Vector:"+v.capacity());
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System.out.println("size of Vector:"+v.size()); v.add(new Integer(10)); v.add(new Float(10.9f)); System.out.println("Capacity Of Vector:"+v.capacity()); System.out.println("size of Vector:"+v.size()); System.out.println(v); v.removeElementAt(3); System.out.println("After Removing One Element Capacity Of Vector:"+v.capacity()); System.out.println("size of Vector:"+v.size()); System.out.println(v); Enumeration e=v.elements(); while(e.hasMoreElements()) { System.out.println(e.nextElement()); } }}ArrayList class:Eg:import java.util.*;class al{ public static void main(String args[]) { Integer i1=new Integer(10); Integer i2=new Integer(20); Integer i3=new Integer(30); Integer i4=new Integer(40); String s1=new String("Hai"); ArrayList a=new ArrayList(); a.add(i1); a.add(i2); a.add(i3);
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a.add(i4); a.add(s1); System.out.println("Array list is:"+a); }}
TCP:TCP (Transmission Control Protocol) is a connection based protocol that provides a reliable flow of data between two computers.
UDP:UDP is not connection – based like TCP.
Protocol:A protocol is a rule or a complete set of rules defining how computers communicate.
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Types of Protocols: 1.Application Protocol 2.Transport Protocol 3.Network ProtocolURL Classes:URL is an acronym for Uniform Resource Locator and is a reference (an address) to a resource on the internetEg:http: //www.yahoo.comhttp:Protocol Identifier.//www.yahoo.com Resource nameUsing package import java.net.*;Using Classes URL <obj name > = new URL(<Web site name>);URLConnection <obj name>= <Url obj name>.openConnection();
Using Methods Meanings<obj name>.getProtocol(); Display the protocol name<obj name>.getHost(); Display the Resource name<obj name>.getFile(); Display the File name<obj name>.getPort(); Display the Port number<obj name>.getRef(); Display the Reference nameEg://Eg for URL Class and methodsimport java.net.*;import java.io.*;class url{
public static void main(String arg[])throws Exception{URL u=new
Class: 11Socket Classes:A socket is one end point of a two-way communication link between two programs running on the networkA socket is bound to port number so that the TCP Layer can identify the application that data is destined to be sentNormally a server runs on a specific computer and has a socket that is bound to a specific port number. The server just waits, listening to the socket for a client to make a connection request
Syntax for Socket Class declaration:Socket <obj name> = new Socket();
Syntax for Socket Methods declaration:<obj name>.accept(); // Accept the Socket values
ServerSocket Classes:Syntax for ServerSocket Class declaration:ServerSocket <Obj name>=new ServerSocket(<port number>);
Syntax for ServerSocket Methods declaration:<obj name>.accept(); // Accept the Socket values
Eg:Eg for Server Socket//Eg for Socketimport java.net.*;import java.io.*;class serversocket
Socket s;ServerSocket ss=new ServerSocket(4000);System.out.println("Server is waiting");for(;;){
s=ss.accept();System.out.println("port number is:"+s);System.out.println("server is Connected");OutputStream os=s.getOutputStream();PrintStream ps=new PrintStream(os);ps.println("Message from Server BSS\n");
}}
}
Eg:Eg for Client Socket://Eg for client socketimport java.net.*;import java.io.*;class clientsocket{
public static void main(String ar[]) throws Exception{
Java Database Connectivity (JDBC) is a programming framework for Java developers writing programs that access information stored in databases
What is ODBC?
Database that another program links to called a data source. Many data sources, including products produced by Microsoft and Oracle, already use a standard called Open Database Connectivity (ODBC)
Connection between Ms Access to java with ODBC:
Step: 1
Create the database table to MSACCESS for connecting the table
MS ACCESS:
Start run Msaccess (type) ok
Select blank access database (Select your directory) (db1) database THANKING YOU
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name createclose the windows
Step: 2
Start Run control panel (type)ok Administrator tools Data Source (ODBC) user DSNAdd Microsoft access driver [*.mdb] finish
Data source name karthi
Click select optionselect the database name (db1.mdb)okokok
cn=DriverManager.getConnection("jdbc:odbc:karthi");System.out.println("Connection is created");Statement st=cn.createStatement();System.out.println("Statement is created");String s1="create table report(name text,designation
text,salary number)";st.execute(s1);System.out.println("Table Created ");cn.commit();
st.close();cn.close();
}}
Eg://To insert into report databaseimport java.sql.*;class insert{
public static void main(String args[]) throws Exception{
DriverManager.getConnection("jdbc:odbc:karthi");Statement st = cn.createStatement();ResultSet rs;rs = st.executeQuery("select * from report");System.out.println("Name\tDesignation\tSalary");while(rs.next()){
DriverManager.getConnection("jdbc:odbc:karthi");Statement st = cn.createStatement();st.executeUpdate("delete * from report");System.out.println("All Record deleted");cn.commit();st.close();cn.close();
}}
Eg://To drop table from report data baseimport java.sql.*;class drop{
public static void main(String ar[])throws Exception {
cn=DriverManager.getConnection("jdbc:odbc:karthi");System.out.println("Connection is created");Statement st=cn.createStatement();System.out.println("Statement is created");st.execute("drop table report");cn.commit();
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System.out.println("Table dropped"); st.close();
cn.close();}
}
Class: 14Introduction to Applet:Applet is mainly used for create web pagesAn applet is a dynamic interactive program that can run inside a web page.Displayed by a java capable such as hot java, Netscape, Opera, Mozilla Fire fox, I.E (Internet Explorer)
Advantage of applet:
Run inside a java browserJava applet has restricted to ensure security & prevent them from being affected by the virus.
Syntax for color class:Color <obj name> = new Color ( );OrColor <obj name> = new Color (<color name>);OrColor <obj name> = new Color (<red int >, <green int >, <blue int>);
Method for color classes:setForeground (Color <obj name>);setBackground (Color <obj name>);setColor(Color <obj name>);
Notes: Here set color is a graphics class method so we call the graphics object
Standard colors:
Color name Rgb values
Color. White 255,255,255
Color. Black 0,0,0
Color. Lightgray 192,192,192
Color. Gray 128,128,128
THANKING YOUCREATED BY A.KARTHIKEYAN
COMPLETE JAVA NOTES
Color. Darkgray 64,64,64
Color. Red 255,0,0
Color. Green 0,255,0
Color. Blue 0,0,255
Color. Yellow 255,255,0
Color. Cyan 0,255,255Color. Magenta 255,0,255
Color. Pink 255,175,175Color. Orange 255,200,0
Eg://Eg for Color classimport java.applet.*;import java.awt.*;public class p2 extends Applet{
public Color b=new Color(255,255,0);public Color f=new Color(0,0,255);public void init(){
Font Class:Syntax for font class:Font <obj name> = new Font (<name>, <style>, <size>);Methods for font classes:setFont <obj name>; //To apply fontHere:setFont also one of the graphics method.
Some font name:EG:Times New RomanMonotype Corsiva
Style:Font. BOLDFont. ITALICFont. PLAIN
Eg://Eg for Font classimport java.applet.*;import java.awt.*;public class p3 extends Applet{
public Color b=new Color(255,255,0);public Color f=new Color(0,0,255);public Font ff=new Font("Monotype Corsiva",Font.BOLD,26);public void init(){
