demoexception.java

java网络编程

package exception;

public class demoException {
static void demoException()
{
  try
  {
	  throw new NullPointerException("haha!");
	  
  }catch(NullPointerException e)
  {
	  System.out.println("caught inside demoException!");
	  throw e;
  }
  
}

public static void main(String[] args)
{
	try{
		demoException();
		
	}catch(NullPointerException e){
		System.out.print("in main e="+e);
	}
}
}