itft-Overview of java language

itft-Overview of java language

• 1.
  OVERVIEW OF LANGUAGE
• 2.
  Contents • Introduction • SimpleJava Program • More of Java • An application With Two classes
• 3.
  Introduction • JAVA isa general purpose object oriented language. • We can develop two types of JAVA programs:- • Stand-alone Application:- these are java programs that are used to carry out a certain task at a stand- alone local computer. • Web Applets:- Web applets are the small java programs used to develop web applications.
• 4.
  Introduction continue.. • Executinga Stand- alone application involve two steps • Compile the source code into byte code(javac compiler). • Executing the byte code program(java interpreter). • Executing a Web Applets also involve two steps • Compile the source code into byte code(javac compiler). • Executing the byte code with java enabled browser.
• 5.
  Simple Java Program •Let us look at a simple code that would print the words Hello World. public class MyFirstJavaProgram { /* This is my first java program. This will print 'Hello World' as the output */ public static void main(String []args) { System.out.println("Hello World");//prints Hello World } }
• 6.
  Simple Java Program •Let us look at a simple code that would print the words Hello World. public class MyFirstJavaProgram  Class Declaration { /* This is my first java program. This will print 'Hello World' as the output */ public static void main(String []args) { System.out.println("Hello World");//prints Hello World } }
• 7.
  Simple Java Program •Let us look at a simple code that would print the words Hello World. public class MyFirstJavaProgram  Class Declaration {  Opening Brace /* This is my first java program. This will print 'Hello World' as the output */ public static void main(String []args) { System.out.println("HelloWorld");//prints HelloWorld } }
• 8.
  Simple Java Program •Let us look at a simple code that would print the words Hello World. public class MyFirstJavaProgram  Class Declaration {  Opening Brace /* This is my first java program. This will print 'Hello World' as the output */ public static void main(String []args)  the main line { System.out.println("HelloWorld");//prints HelloWorld } }
• 9.
  Simple Java Program •Let us look at a simple code that would print the words Hello World. public class MyFirstJavaProgram  Class Declaration {  Opening Brace /* This is my first java program. This will print 'Hello World' as the output */ public static void main(String []args)  the main line { System.out.println("HelloWorld");//prints HelloWorld  output line } }
• 10.
  More of java importjava.lang.Math; public class Exercise { public static void main(String[] args) { double x = 16; double y; y= Math.sqrt(x); System.out.println("The square root of " +y); } }
• 11.
  More of java importjava.lang.Math; public class Exercise { public static void main(String[] args) { double x = 16; double y; y= Math.sqrt(x);  math function System.out.println("The square root of " +y); } }
• 12.
  An application WithTwo classes class Room { float length; float breadth; void getdata(float a, float b) { length= a; breadth= b; } }
• 13.
  Continue.. class RoomArea { public staticvoid main(String args[]) { float area; Room room1= new Room (); //creates an object room1 room1.getdata(14,10);//assign value to length and breadth area = room1.length * room1.breadth; System.out.println(“Area =”+area); } }