dialbeaninfo.java

learning java的源代码。书中每个实例都有相关的代码example。

//file: DialBeanInfo.java
package magicbeans;
import java.beans.*;

public class DialBeanInfo extends SimpleBeanInfo {

  public PropertyDescriptor[] getPropertyDescriptors(  ) {
    try {
      PropertyDescriptor value =
        new PropertyDescriptor("value", Dial.class);
      PropertyDescriptor minimum =
        new PropertyDescriptor("minimum", Dial.class);
      PropertyDescriptor maximum =
        new PropertyDescriptor("maximum", Dial.class);

      value.setBound(true);
      minimum.setBound(false);
      maximum.setBound(false);

      return new PropertyDescriptor [] { value, minimum, maximum };
    }
    catch (IntrospectionException e) {
      return null;
    }
  }
}