debug6_5.java

来自「北京大学出版社的」· Java 代码 · 共 35 行

package questions.c6;
class TooBigException {
   private double value;
   public TooBigException( double errorValue ) {
      value = errorValue;
   }
   public double getErrorValue() {
      return value;
   }
}
public class Debug6_5 {
   private double pressure = 10.0;
   public void setPressure( double newPressure )
                        throws TooBigException {
      if ( newPressure > 2*pressure ) {
         // pressure must be increased slowly
         throw TooBigException();
      } else {
         pressure = newPressure;
      }
   }
   public double getPressure() {
      return pressure;
   }
   public static void main( String[] args ) {
      try {
         Debug6_5 x = new Debug6_5();
         x.setPressure( 15.0 );
         x.setPressure( 25.0 );
         x.setPressure( 60.0 );
      } catch ( TooBigException tbe ) {
         System.out.println( tbe.value );
      }
   }
}