"Complete Core Java Notes: Concepts, Syntax, and Examples"

Java lab


1.a) Install setup java environment

● Download or save the appropriate JDK version for windows

● Right click the computer icon on your desktop and select properties

● Click advanced system settings

● Click environment variables

● Click new

● Enter java HOME as the variable name

● Enter the path to the JDK as the variable value

● Click ok , locate path variable

● Click ok



b) Install java editor and configure workspace


Google


Download JDK


Select version
[Windows x64 bit version]


Download now


Tool wizard


Next


Eclipse

, Java lab


Select version


Click


Download now




ok


file


new


java project [module}


give project name


finish


create


class


give class name [class]


finish


create first program



c) Execution of first java program

, Java lab


program


publicclassMyFirstJavaProgram{
publicstaticvoid main(String[]args){
System.out.println("Hello World");// prints Hello World
}
}
Output : Hello world


d) Java code execution process

● Open eclipse and click <file><new><project>

● Provide the project name and click on the finish button

● Package explorer

● Right click on the source folder select new > class from the submenuprovide class
name and click on finish
● Write program and save it

● click on the run menu 🡪output be displayed at the bottom of the screen

2) code and execute and debug programs that uses different types of
variables and datatypes
Programs
package programs;
importjava.lang.*;

publicclass employee {

intempno;
String name;
String desig;
floatsalary;

voidsetdata(inteno,Stringn,Stringd,floatsal)

{
empno=eno;
name=n;
desig=d;
salary=sal;