java常見異常和錯誤

標籤：java 異常 錯誤

異常

1.NumberFormatException  數字格式化異常

2.ArithmeticException 算術異常

3.ArrayIndexOutOfBoundsException  數組超出綁定異常:沒有輸入參數,或輸入的參數不夠

4.NullPointerException null 指標異常:使用了未執行個體化的對象

5.NoSuchMethodError:main  找不到主方法

6.ClassCastExeption:A 類轉換異常

7.IllegalThreadStateException

錯誤:

1.integer number too large

2.name has private access in Person 無法訪問封裝屬性

3.call to this must be first statement in constructor  錯誤的調用,只能放在構造方法的首行

4.recursive constructor invocation 遞迴調用了構造方法

5.non-static variable name cannot be referenced from a static context  不能調用非static屬性

6.non-static method fun() cannot be referenced from a static context 不能調用非static方法

7.Singleton() has private access in Singleton 無法執行個體化

8.print() in Student cannot override print() int Person; attempting to assign weaker access 9.privileges; was public 覆寫父類中的方法,便縮小了許可權,錯誤

10.cannot inherit from final A

11.print() in B cannot override print() in A; overridden method is final

12.cannot assign a value to final variable INFO

java常見異常和錯誤