throw
手動(dòng)拋出異常
執(zhí)行異常的拋出動(dòng)作
private static double divide(double a, double b) {
if(b==0){
//新建異常對(duì)象
ArithmeticException e = new ArithmeticException("/ by zero 異常");
//把異常對(duì)象拋回到調(diào)用位置
throw e;
}
return a/b;
}
