package second;

public class C {

    public static void main(String[] args){

        String name = null;//定义一个null的字符串

        int name_len = 0;

        try{

            name_len = name.length();//由于name为null，这里程序会爆出NullPointerException的异常

        }catch(NullPointerException e){//捕获异常

            System.out.println(e.getStackTrace());

            System.out.println("程序异常了!");

        }catch(Exception e){

            System.out.println(e.getStackTrace());

        }

        System.out.println(name_len);

    }

}