cwh_62_63_64_65_InterpreterVsCompiler_and_Packages.java

package company;

public class cwh_62_63_64_65_InterpreterVsCompiler_and_Packages {

	public static void main(String[] args) {
		
		/* 
		Interpreter translates one statement at a time into machine code.
		Compiler scans the whole program and translates whole of it into machine code.
		   
		 Q. Is Java compiled or interpreted?
	      	--> Java is a hybrid language, both compiled as well as interpreted.
	       
	       	JavaFile(name.java)  --(compiled using javac)-->  ClassFile[(name.class),(bytecode)]  -->  csn be used by Java interpreter
	       
	      	-A JVM can be used to interprete this bytecode. 
	      	-This bytecode can be taken to any platform(Windows/Mac/Linux) for execution.
	      	-Hence, Java is platform independent.
	      
	       	For executing Java code on Cmd :
	        			javac name.java
	        			java name(class file name)
	        
	        Packages:-
	                 - A Package is used to group related classes.
	                 - Packages help in avoiding name conflicts. (i.e. more than one classes can not have same name)
	                 - There are two types of packages:
	                 ~ Built-in packages --> Java API
	                 ~ User defined packages --> custom packages
	                  
		 Using Java packages:
		 		- import java.lang.*  --> import everything from java.lang
		 		- import java,lang.String  --> import String from java.lang
		 		- s = new java.lang.String("Parth")  --> use without importing
		 						
		 Creating a package:
		 		javac Name.java  --> creates Name.class
		 		javac -d . Name.java  --> creates a package folder
		*/
		
	}

}