What are Java's Built-in Exceptions
What are Java's Built-in Exceptions
Exceptions subclassing RuntimeException need not be included in any method's throws list. These are called unchecked exceptions.
The unchecked exceptions defined in java.lang are listed in the following table.
Exception | Meaning |
---|---|
ArithmeticException | Arithmetic error, such as divide-by-zero. |
ArrayIndexOutOfBoundsException | Array index is out-of-bounds. |
ArrayStoreException | Assignment to an array element of an incompatible type. |
ClassCastException | Invalid cast. |
EnumConstantNotPresentException | An attempt is made to use an undefined enumeration value. |
IllegalArgumentException | Illegal argument used to invoke a method. |
IllegalMonitorStateException | Illegal monitor operation, such as waiting on an unlocked thread. |
IllegalStateException | Environment or application is in incorrect state. |
IllegalThreadStateException | Requested operation not compatible with current thread state. |
IndexOutOfBoundsException | Some type of index is out-of-bounds. |
NegativeArraySizeException | Array created with a negative size. |
NullPointerException | Invalid use of a null reference. |
NumberFormatException | Invalid conversion of a string to a numeric format. |
SecurityException | Attempt to violate security. |
StringIndexOutOfBounds | Attempt to index outside the bounds of a string. |
TypeNotPresentException | Type not found. |
UnsupportedOperationException | An unsupported operation was encountered. |
The checked exceptions are listed in the following table.
Exception | Meaning |
---|---|
ClassNotFoundException | Class not found. |
CloneNotSupportedException | Attempt to clone an object that does not implement the Cloneable interface. |
IllegalAccessException | Access to a class is denied. |
InstantiationException | Attempt to create an object of an abstract class or interface. |
InterruptedException | One thread has been interrupted by another thread. |
NoSuchFieldException | A requested field does not exist. |
NoSuchMethodException | A requested method does not exist. |