import java.io.IOException

public class ThrowDemo{

public static void processFile(String toFile) throws IOException

{

//Omitted implementation propagates all

//throw  IOException back to the caller

}

public static void main(String[] args){

for(String fileName:args){

try{

processFile(fileName);

}

catch(IOException e){

System.out.println(e);

}

}

}

小结：

throw子句用于抛出异常‘

throws子句用于传播异常