1.3 Java Sample Programming

Java Program

class ClassName

{

public static void main(String args[])

{

-

-

}

}

class -> its a keyword.

ClassName -> Alpha numeric should being with Alphabet.

Notes:-

    1. print -> System.out.println("for Displaying");

    2. javac filename.java -> for compilation.

    3. java ClassName -> for execute.

Sample Programming Example1:

clas Program1

{

public static void main(String args[])

{

System.out.println("welcome to Java StudyPoint");

}

} 

To execute the program step by step through command prompt:

step1 -> first save the program file with any name and with java extension.

            eg:- Program1.java

step2: using command prompt we have to change directory of file location.

stem3: compile program using command "javac filename.java"

        eg:- javac Program1.java

step4: execute the program using command "java ClaasName"

        eg:- java Program1

Sample Program Example2:

class Program2

{

public static void main(String args[])

{

System.out.println(12345);

System.out.println(23.45);

System.out.println(''j);

System.out.println(true);

System.out.println("Java StudyPoint");

}

}

Sample Program Example3:

class Program3

{

public static void main(String args[])

{

System.out.println(12+24); //addition

System.out.println("java"+ "developer"); //concatenation

}

}

Sample Program Example 4 :

class Program4

{

public static void main(String args[])

{

System.out.println(20+20); //addition

System.out.println("numbe is"+20); //concatenation

System.out.println("numbe is"+20+20); //concatenation

System.out.println(20+ "is the number"); 

System.out.println(20+20 + "is the number");

}

}

for more details please follow the video: