Exceptions which extend RuntimeException class are known as UnChecked Exceptions. We are not supposed to write the statements (for which we expect UnChecked exception) under try...catch block. ArithmeticException and NullPointerException are some examples of UnChecked exception.
UnChecked/Runtime exception reported:Code:
String  str = new String;
str = "Java Tip";
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 5