debug4_3.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.c4;
public class Debug4_3 {
   private double x;
   public Debug4_3( double input ) {
      x = input;
   }
   public String toString() {
      return String.valueOf( x );
   }
   void finalize() throws Throwable {
      System.out.println( "Goodbye!" );
   }
   public static void main( String[] args ) {
      Debug4_3 a = new Debug4_3( -7.3 );
      System.out.println( a );
      System.gc();
      System.runFinalize();
   }
}