debug9_5.java

程序练习中包括书中实例程序代码和练习中要用到的代码,是压缩文件

package questions.c9;
public class Debug9_5 {
   public static double calculate( double x,
                                   double y ) {
      class Helper {
         double doSomething() {
            return Math.sqrt( x ) + Math.sqrt( y );
         }
      }
      Helper h = new Helper();
      return Math.exp( h.doSomething() );
   }
   public static void main( String[] args ) {
      System.out.println( calculate( 4.0, 9.0 ) );
   }
}