자바의신 ch19 & ch20

package d.lang;

public class NumberObjects {
  public static void main(String[] args) {
    NumberObjects sample = new NumberObjects();
    sample.parseLong("r1024");
    sample.printOtherBase(1024L);
  }
  public long parseLong(String data) {
      try{
      return Long.parseLong(data);} catch(NumberFormatException e) {
        System.out.println(e + " is not a number");
        return -1;
      }
 }
 public void printOtherBase(long value) {
   System.out.println("Original:"+value);
   System.out.println("Binary  :"+Long.toBinaryString(value));
   System.out.println("Hex     :"+Long.toHexString(value));
   System.out.println("Octal   :"+Long.toOctalString(value));
 }

}