The getDouble() method of java.lang.reflect.Field used to get the value of double which has to be static or instance field type. This method also used to get the value of another primitive type convertible to type double via a widening conversion. When a class contains a static or instance double field and we want to get the value of that field then we can use this method to return the value of Field.
public double getDouble(Object obj) throws IllegalArgumentException, IllegalAccessException
Parameters: This method accepts a single parameter obj which is the object to extract the double value from.
Return value: This method returns the value of field converted to type double.
Exception: This method throws following Exception:
- IllegalAccessException: This exception is thrown if Field object is enforcing Java language access control and the underlying field is inaccessible.
- IllegalArgumentException: This exception is thrown if the specified object is not an instance of the class or interface declaring the underlying field or if the field value cannot be converted to the type double by a widening conversion.
- NullPointerException: This exception is thrown if the specified object is null and the field is an instance field.
- ExceptionInInitializerError: This exception is thrown if the initialization provoked by this method fails.
Below programs illustrate getDouble() method:
Value of double Field Marks is 34.13 Value of double Field Fees is 3413.99
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