Java Comments

A comment line is an description or explanation of the source code. The command line is also used to hide a line of code. These comment lines are ignored by the compiler.

In Java there are three types of comments. They are,

• Single Line Comment
• Multi Line Comment
• Documentation Comment

Single Line Comment

Single line comment is used to comment only one line of code. Single line comment starts with two forward slash(//).

Example:

class Single_line
{
public static void main(String args[])
{
System.out.println("This is the example for Single line comment"); //This is the printing statement
}
}

Output:

This is the example for Single line comment

Multi Line Comment

To comment more than one line of code Multiline comment is used. Multiline comments starts with /* and ends with */.

Example:

class multiline_comment
{
public static void main(String args[])
{
int a = 10, b = 20, c;
/*
Here the variable a, b, and c are
declared as integer.
*/
c = a+b;
System.out.println("The sum of the value is:" + c);
System.out.println("This is an example for Multiline comment");
}
}

Output:

The sum of the value is:30
This is an example for Multiline comment

Documentation Comment

Documentation comment is used in writing code for project or software package.

Example:

/**
* Prime factor is the factor of the
* given number which is a prime number.
*
* @author  Neural Beast
* @version 0.1
*/
import java.util.Scanner ;
class documentation_comment
{
    public static void main(String[] args)
{
        Scanner sc=new Scanner (System .in);
        int n=0;
        n=sc.nextInt();
        System .out .println ("Prime Factor of" +" "+ n +" "+ "are :");
        for(int i=2;i<n/2;i++)
        {
            for(;n%i==0;){
            System .out .print (i+" ");
            n=n/i;
        }
        }
if(n>2)
  {
    System .out .println (n);
  }
}
}

Output:

10
Prime Factor of 10 are :
2 5