Java program to calculate the Simple Interest and Input by the user.

import java.util.*;
class SimpleInterest {
 int p, t;
 float si, r;
 public si() {
  r = 0;
  p = 0;
 }
 public void getdata() {
  Scanner sc = new Scanner(System.in);
  System.out.println("Enter principle : ");
  p = sc.nextInt();
  System.out.println("Enter rate : ");
  r = sc.nextFloat();
  System.out.println("Enter time period : ");
  t = sc.nextInt();
 }
 public void cal() {
  si = (p * r * t) / 100;
 }
 public void display() {
  System.out.println("Principle : Rs" + p);
  System.out.println("Rate : " + r);
  System.out.println("Time period : " + t);
  System.out.println("Simple Interest : Rs" + si);
 }
 public static void main(String args[]) {
  si s = new si();
  s.getdata();
  s.cal();
  s.display();
 }
}