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  • Java defines several exception classes within the standard java.lang package.
  • The most common of these exceptions are subclasses of the standard type RuntimeException. Since java.lang is implicitly imported into all java programs, most exceptions received from RuntimeException are automatic.
  • Java defines several other types of exceptions that are related to its different class libraries. The following is a list of Unchecked RuntimeException.
No. Exception and Description
1 java.lang.ArithmeticException
Arithmetic error, for example, division by zero.
2 java.lang.ArrayIndexOutOfBoundsException
The array index is out of bounds.
3 java.lang.ArrayStoreException
Assign an incompatible type to an array element.
4 java.lang.ClassCastException
Invalid cast of types.
5 java.lang.IllegalArgumentException
Invalid argument used to call the method.
6 java.lang.IllegalMonitorStateException
Invalid operation of the monitor, for example, waiting for an unlocked stream.
7 java.lang.IllegalStateException
The environment or application is in the wrong state.
8 java.lang.IllegalThreadStateException
The requested operation is incompatible with the current state of the stream.
9 java.lang.IndexOutOfBoundsException
Some type of index is out of bounds.
10 java.lang.NegativeArraySizeException
The array was created with a negative size.
11 java.lang.NullPointerException
Invalid use of the null reference.
12 java.lang.NumberFormatException
Invalid conversion of a string to a number format.
13 java.lang.SecurityException
Attempt to break security.
14 java.lang.StringIndexOutOfBounds
An attempt to index outside the string.
15 java.lang.UnsupportedOperationException
An unsupported operation was detected.

The following is a list of the Checked Exceptions in Java defined in java.lang

No. Exception and Description
1 java.lang.ClassNotFoundException
Class not found.
2 java.lang.CloneNotSupportedException
Attempted to clone an object that does not implement the Cloneable interface.
3 java.lang.IllegalAccessException
Access to the class is denied.
4 java.lang.InstantiationException
An attempt was made to create an object of an abstract class or interface.
5 java.lang.InterruptedException
One thread was interrupted by another thread.
The requested field does not exist.
The requested method does not exist.

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