异常处理信息

 

public class Test {public static void main(String[] args) {try {test1();} catch(Exception e ) {e.printStackTrace();System.out.println(e.getMessage());}}public static void test() throws Exception {String a = "";String b = null;try {System.out.println(b.toString());} catch(Exception e) {e.printStackTrace();throw new Exception("this is a message for u 2 show" ,e);}}public static void test1() throws Exception {test();}}

 

this is a message for u 2 showjava.lang.NullPointerExceptionat Test.test(Test.java:18)at Test.test1(Test.java:26)at Test.main(Test.java:7)java.lang.Exception: this is a message for u 2 showat Test.test(Test.java:21)at Test.test1(Test.java:26)at Test.main(Test.java:7)Caused by: java.lang.NullPointerExceptionat Test.test(Test.java:18)... 2 more