Java 自定义异常

Goods.java

package ligong.sdut.demo;

public class Goods {
       boolean isDanger;
       String name;
       public void setIsDanger(boolean boo) {
          isDanger = boo;
       }
       public boolean isDanger() {
          return isDanger;  
       }
       public void setName(String s) {
          name = s;
       }
       public String getName() {
          return name;
       }
    }

Machine.java

package ligong.sdut.demo;

public class Machine {

    public void checkBag(Goods goods)  throws DangerException {
        // TODO Auto-generated method stub
        if (goods.isDanger) {   

           throw new DangerException();         

        }
    }
}

DangerException.java

package ligong.sdut.demo;

public class DangerException extends Exception{

    String message;

    public DangerException() {
        super();
        this.message = "危险品";
    };
    public void toShow() throws Exception{
        System.out.println(message+"");
    }

}

Check.java

package ligong.sdut.demo;

public class Check {
     public static void main(String args[]) throws Exception {
          Machine machine = new Machine();
          String name[] ={"苹果","炸药","西服","硫酸","手表","硫磺"};
          Goods [] goods = new Goods[name.length]; //检查6件物品  
          for(int i= 0;i<name.length;i++) {
             goods[i] = new Goods();
             if(i%2==0) {
                goods[i].setIsDanger(false);
                goods[i].setName(name[i]);
             }
             else {
                goods[i].setIsDanger(true);
                goods[i].setName(name[i]);
             } 
          }
          for(int i= 0;i<goods.length;i++) {
              try {
                  machine.checkBag(goods[i]);
                  System.out.println(goods[i].getName()+"检查通过");
            } catch (DangerException e) {
                e.toShow();
                  System.out.println(goods[i].getName()+"检查不能通过");
            }




          }     
       } 
}