Need some urgent help with Java code...

Question

Hello
i am taking a java class..beginner..and i am a dud at programming...
had a couple of questions ..how do make a program ignore negative
integer values,make it terminate when zero is entered instead of a number ,how should i calculate maximum minimum of integers..please help me..
thanks
damini

Answer 1

You got some good advice from Java_Jay.
Here is a snippet I keep handy for console input and output. It doesn't do your home work but gives you a working example of getting numbers from stdin:
import java.io.*;
public class DemoKeyboardInput {
     public static void main(String[] args) throws IOException {
          // open keyboard for input (call it 'stdin')
          BufferedReader stdin = new BufferedReader(new InputStreamReader(
                    System.in), 1);
          // get input from the keyboard
          System.out.print("Please enter your name: ");
          String name = stdin.readLine();
          System.out.print("Please enter your age: ");
          String s1 = stdin.readLine();
          System.out.print("Please enter the radius of a circle: ");
          String s2 = stdin.readLine();
          // perform conversions on input strings
          int age = Integer.parseInt(s1); // string to int
          double radius = Double.parseDouble(s2); // string to double
          // operate on data
          age++; // increment age
          double area = Math.PI * radius * radius; // compute circle area
          // output results
          System.out.println("Hello " + name);
          System.out.println("On your next birthday, you will be " + age
                    + " years old");
          System.out.println("Area of circle is " + area);
}