Java Naming Conventions

Java naming convention is a components require names. Names used for classes, variables and methods are called identifiers.

public class Student
{
//code snippet
}

interface Printable
{
//code snippet
}

It should start with lowercase letter.
It should be a verb such as main(), print(), println().
If the name contains multiple words, start it with a lowercase letter followed by an uppercase letter such as actionPerformed().
Example:-

 class Employee
{
//method
void draw()
{
//code snippet
}
}

It should start with a lowercase letter such as id, name.
It should not start with the special characters like & (ampersand), $ (dollar), _ (underscore).
If the name contains multiple words, start it with the lowercase letter followed by an uppercase letter such as firstName, lastName.
Avoid using one-character variables such as x, y, z.
Example :-

  class Employee
{
//variable
int id;
//code snippet
}

It should be a lowercase letter such as java, lang.
If the name contains multiple words, it should be separated by dots (.) such as java.util, java.lang.
Example :-

package info.rojgarbharat; //package
class Employee
{
//code snippet
}

It should be in uppercase letters such as RED, YELLOW.
If the name contains multiple words, it should be separated by an underscore(_) such as MAX_PRIORITY.
It may contain digits but not as the first letter.
Example :-

class Employee
{
//constant
 static final int MIN_AGE = 18;
//code snippet
}

OOPs Concepts