java - try catch会降低效率吗？

Question

以下之间是否存在效率差异:-

public boolean canDivisionBeDone(int iA, int iB){

  try{
      float a = iA/iB;
    }catch(Exception e){
    return false;
 }

return true;
}

和

public boolean canDivisionBeDone(int iA, int iB){

 if(iB == 0){
     return false;
 }else{
         float a = iA/iB;
 }

return true;
}

如果是，为什么？

Answer 1

using try 本身没有任何开销，但如果 using block 创建了太多异常，您应该尝试检查您的代码。

Creating an exception in Java is a very slow operation. Expect that throwing an exception will cost you around 1-5 microseconds. Nearly all this time is spent on filling in the exception thread stack. The deeper the stack trace is, the more time it will take to populate it.

了解更多详细信息，请阅读here