safelengthtest.java

Java程序设计技巧与开发实例附书源代码。

public class SafeLengthTest
{  public static void main(String args[])
   {  Length length = new Length(2, "meter");
      System.out.print("Current: ");
      length.showLength();
      System.out.println("Value: " + length.getValue());
      System.out.println("Scale: " + length.getScale());
      System.out.println("Valid: " + length.isValid());
      System.out.print("To 4 meter: ");
      length.setValue(4);
      length.showLength();
   }
}