Java中的异常处理(一)

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);
    }
}