e.printStackTrace和System.out.println(e)之间的区别 [英] Difference between e.printStackTrace and System.out.println(e)
问题描述
可能是一个新手问题,但是每个人似乎都使用 e.printStackTrace()
,但是我一直使用 System.out.println(e )
当异常处理。有什么区别,为什么 e.printStackTrace()
优先?
Probably a newbie question, but everyone seems to use e.printStackTrace()
, but I have always used System.out.println(e)
when exception handling. What is the difference and why is e.printStackTrace()
preferable?
推荐答案
p>所使用的输出流与@Brian指出的不一样,但细节级别也不尽相同,您可以尝试下面的简单测试。输出:
The output stream used is not the same as pointed out by @Brian, but the level of detail is not the same either - you can try with the simple test below. Output:
使用println:您只知道抛出什么异常
With println: you only know what exception has been thrown
java.lang.UnsupportedOperationException:尚未实现
java.lang.UnsupportedOperationException: Not yet implemented
使用printStackTrace:您也知道导致了什么(行号+调用堆栈) p>
With printStackTrace: you also know what caused it (line numbers + call stack)
java.lang.UnsupportedOperationException:尚未实现
在javaapplication27.Test1.test(Test1.java:27)< br>
在javaapplication27.Test1.main(Test1.java:19)
java.lang.UnsupportedOperationException: Not yet implemented
at javaapplication27.Test1.test(Test1.java:27)
at javaapplication27.Test1.main(Test1.java:19)
public static void main(String[] args){
try {
test();
} catch (UnsupportedOperationException e) {
System.out.println(e);
e.printStackTrace();
}
}
private static void test() {
throw new UnsupportedOperationException("Not yet implemented");
}
这篇关于e.printStackTrace和System.out.println(e)之间的区别的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!