Executing a Java Program

Executing a Java Program :
Is it your first time to write code in Java.Suppose your wrote the following Java class and you want to run it .

Learn.java File
java code

package codemiles;
 
public class Learn {

    String LessonTitle;
    public Learn(String Title)  
    {
        LessonTitle=Title;
    }
     
    public static void main(String[] args) 
    {
        
        Learn myLesson=new Learn("Java Programming");
        myLesson.printTitle();
        
    }

    public void setLeasonTitle(String LessonTitle) {
        this.LessonTitle = LessonTitle;
    }

    public String getLessonTitle() {
        return LessonTitle;
    }
    public void printTitle()
    { 
        System.out.println("Lesson Title: "+LessonTitle);
    }
            
}

The First case you will run it from the command line in your operating system . In Java the compiler compiles the code into a bytwcode which is not executable . Bytecode is somewhere in the middle of source code and executable code.

To create a bytecode :

Code:

javac Learn.java

After this step a bytecode will be generated as Learn.class .

To execute write :

Code:

java Learn

the output will be the following :

Code:

Lesson Title:  Java Programming