infnan.java~1~

java2参考大全上的例子的源码和自己的理解.

package isinfinite;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

// Demonstrate isInfinite() and isNaN()
class InfNaN {
  public static void main(String args[]) {
    Double d1 = new Double(1 / 0.);
    Double d2 = new Double(0 / 0.);

    System.out.println(d1 + ": " + d1.isInfinite() + ", " + d1.isNaN());
    System.out.println(d2 + ": " + d2.isInfinite() + ", " + d2.isNaN());
  }
}