標籤:can nal otf string 方法 number and java基礎 arp
五種常見異常
1、NullPointerException null 指標
2、ClassNotFoundException 指定類不存在
3、ArithmeticException運算異常
4、ArrayIndexOutOfBoundsException數組下標越界
5、IllegalArgumentException方法的參數錯誤
6、IllegalAccessException 沒有存取權限
小例子
import java.util.Scanner;public class Exception { int shang; public Exception(int chushu,int beichushu){ shang=chushu/beichushu; } public static void main(String[] args) { try { Scanner sc=new Scanner(System.in);String chushu=sc.nextLine();String beichushu=sc.nextLine();int a =Integer.parseInt(chushu);int b =Integer.parseInt(beichushu);Exception exception =new Exception(a, b);System.out.println(exception.shang);} catch (NumberFormatException e) {System.out.println("NumberFormatException");e.printStackTrace();// TODO: handle exception} catch (ArithmeticException e) { System.out.println("ArithmeticException"); // TODO: handle exception e.printStackTrace(); }finally {System.out.println("666");}}}
JAVA基礎篇—異常