Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.BufferedReader;
import java.io.InputStreamReader;

class Main {
    public static void main(String args[]) throws Exception {
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);

        while (true) {
            System.out.print("Radius? ");
            String str = br.readLine();
            double radius;
            try {
                radius = Double.valueOf(str).doubleValue();
            } catch (NumberFormatException nfe) {
                System.out.println("Incorrect format!");
                continue;
            }
            if (radius <= 0) {
                System.out.println("Radius must be positive!");
                continue;
            }
            System.out.println("radius " + radius);
            return;
        }
    }
}