例外 - 立即投掷并抓住 [英] Exceptions - Throw and catch right away
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问题描述
if(...)是否有意义的引发异常? {
} else {
try {
throw new Exception();
} catch(Exception e){
e.printStackTrace();
}
}
解决方案
没有必要抛出,你可以直接调用:
new Exception()。printStackTrace();
甚至更容易:
Thread.dumpStack();
您还可以从当前线程获取堆栈跟踪作为数组:
StackTraceElement [] trace = Thread.currentThread()。getStackTrace();
如果你想做更详细的事情,例如在运行时检查堆栈(例如,获取调用方法名称)。
Does it make sense to throw an exception and directly catch it just to print error?
if(...){
} else {
try{
throw new Exception();
} catch (Exception e){
e.printStackTrace();
}
}
解决方案
There's no need to throw-and-catch, you can simply call:
new Exception().printStackTrace();
or even easier:
Thread.dumpStack();
You can also get the stack trace from the current thread as an array:
StackTraceElement[] trace = Thread.currentThread().getStackTrace();
If you want to do something more detailed like inspect the stack at runtime (e.g. to get the calling method's name).
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