![public class a
{
public static void main(String
args[])
{
System.out.println("hello");
}
}Note : - Things to remember
• Java is a case sensitive language so please check the capital and small
letters used in this program
• When you save this program save it with the name as “class-name.java” for
example in the above code our class name is a so we have to save this
program with the name of “a.java”.](https://image.slidesharecdn.com/installationofjavaandprogramexecution-200917115416/85/Installation-of-java-and-program-execution-7-320.jpg)
Installation of java and program execution
- 2. OUTLINE • Downloading and Installation of JDK • Setting path, compilation of program and execution of the complied program
- 3. 2 APPROACHES • Hard work • Smart work
- 4. HARD WORK VS SMART WORK • Hard work - means that you have to do all the java path establishment, creation of program, compilation and execution of java program by you own. • Smart Work – means the use of an IDE(Interacted Development Environment) through which we can create java programs using drag and drop facility. • In this session, you will learn the installation, complilation and execution of java program manually (hard work)
- 5. STEP -1 JDK INSTALLATION PROCESS • For the JDK(Java Development Kit) installation first of all we have to go on the oracle.com website and find the latest version of JDK. • There is a link from where you can download the JDK latest version https://www.oracle.com/java/technologies/javase-jdk15-downloads.html Download the latest version and copy it in a folder named as java on your drive like C drive/D drive or any other local drive now unzip the downloaded file for example in this case e:java and find the path of javac which is a java compiler. Generally it is available in bin folder of our jdk folder. When you unzip the downloaded file you will find the JDK-15 folder in which there will be a bin folder. Select the bin folder and copy the path which we will require at the time of setting of path of our program to java library. This will be E:javajdk-15bin
- 6. STEP – 2 CREATION OF PROGRAM • Create a folder in the drive of your choice on your computer • Open any basic editor like NOTEPAD, NOTEPAD++, WORDPAR or any other of your choice • Write a program as given in the following slide and save it in your java program folder as e:java program
- 7. public class a { public static void main(String args[]) { System.out.println("hello"); } }Note : - Things to remember • Java is a case sensitive language so please check the capital and small letters used in this program • When you save this program save it with the name as “class-name.java” for example in the above code our class name is a so we have to save this program with the name of “a.java”.
- 8. STEP 3 - SETTING THE PATH • To compile our program we have to set a path to our java complier and interpreter. • Now you have to go in run and type cmd • It will open a command prompt window as in the following slides
- 11. STEP 3 - SETTING THE PATH – CONTD…. • Now get the location of javac.exe • As you see there is a working directory is c:usershp but we have to change to the java program folder. • Now shift the drive as • c:userhp>e: • E:>cd “java progam” • E:java program> • Now type the path command as • E:java program> set path=E:javajdk-15bin This path is the same path which weget in step 1
- 12. STEP 4 COMPLIALTION OF JAVA PROGRAM • As soon as the path has been created now we have to execute our java program using java complier(javac.exe) so type the following command E:java program>javac a.java • Complier will display all the list of error so now you have to remove all the error present in program. After the debugging, java compiler will create a (filename.class) file which is actually a byte code. In this example a.class will be created • Finally interpret your java class file using java interpreter E:java program>java a • And your java program will get executed.