How To Write If Statements In Java

If with input

import java.io.*;

class arun

{

public Static void main(String args[]) throws IOException

{

DataInputStream in = new DataInputStream(System.in);

{

int a;

System.out.println("Enter the value of a is:");

a=Integer.parseInt(in.readLine());

if(a>=18)

System.out.println("I am eligible ofr vote");

}

}

}