创建自定义事件组

/**
 * @author Beck
 *创建自定义事件组
 */
public class EnrollmentEvent extends java.util.EventObject{//扩展java.util.EventObject类
    private String studentToEnroll;
    private int enrollmentCap;
    
    public EnrollmentEvent(Object source, String studentToEnroll, int enrollmentCap){
        /*必须调用EventObject的构造方法，并把源对象作为参数传递给该方法*/
        super(source);
        this.studentToEnroll = studentToEnroll;
        this.enrollmentCap = enrollmentCap;
    }
    
    public String getStudentToEnroll(){
        return studentToEnroll;
    }
    
    public long getEnrollmentCap(){
        return enrollmentCap;
    }
}