throwdemo.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter9;

class ThrowDemo
{
    static void demoproc()
    {
        try
        {
            throw new NullPointerException("demo");
        }
        catch(NullPointerException e)
        {
            System.out.println("Caught inside demoproc.");
            throw e; // 重新抛出异常
        }
    }

    public static void main(String args[])
    {
        try
        {
            demoproc();
        }
        catch(NullPointerException e)
        {
            System.out.println("Recaught: " + e);
        }
    }
}