Computer and Programming

import java.io.*;
class Input{
    public static void main (String []args) throws IOException{
    InputStreamReader reader=new InputStreamReader(System.in);
    BufferedReader input=new BufferedReader (reader);
   
    System.out.println(" =====PROGRAM LUAS LINGKARAN=====");
    System.out.print("Nama  =  ");
    String nama = input.readLine();
    System.out.print("Kelas =  ");
    String kls = input.readLine();
    System.out.print("NIM   =  ");
    String NIM = input.readLine();
    System.out.println();
   

    System.out.print("Nama  =  ");
    String n = input.readLine();
    System.out.print("Kelas =  ");
    String k = input.readLine();
    System.out.print("NIM   =  ");
    String N = input.readLine();
    System.out.println();
   
    System.out.print("Nama  =  ");
    String j = input.readLine();
    System.out.print("Kelas =  ");
    String h = input.readLine();
    System.out.print("NIM   =  ");
    String o = input.readLine();
    System.out.println();
 
        double phi = 3.14;
        double luas;
    System.out.print("Masukkan Panjang Jari-jari : ");
        double r = Double.parseDouble(input.readLine());
         luas =phi * r * r;
    System.out.println("\n\n =====HASIL INPUT DATA=====");
    System.out.println("Nama     = "+nama);
    System.out.println("Kelas    = "+kls);
    System.out.println("NIM      = "+NIM);
    System.out.println("\nNama     = "+n);
    System.out.println("Kelas    = "+k);
    System.out.println("NIM      = "+N);
    System.out.println("\nNama     = "+j);
    System.out.println("Kelas    = "+h);
    System.out.println("NIM      = "+o);
    System.out.println(" \n=====LUAS LINGKARAN=====");
    System.out.println("LUAS LINGKARAN=" + luas + "\n\n");
       }
}