Field setChar() method in Java with Examples

Last Updated : 10 Jan, 2023

setChar() method of java.lang.reflect.Field used to set the value of a field as a char on the specified object. When you need to set the value of a field of an object as char then you can use this method to set value over an Object. Syntax:

public void setChar(Object obj, char c)
 throws IllegalArgumentException,
 IllegalAccessException

Parameters: This method accepts two parameters:

obj: which is the object whose field should be modified and
c: which is the new value for the field of obj being modified.

Return: This method returns nothing.

Exception: This method throws the following Exception:

IllegalAccessException: if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
IllegalArgumentException: if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementer thereof), or if an unwrapping conversion fails.
NullPointerException: if the specified object is null and the field is an instance field.
ExceptionInInitializerError: if the initialization provoked by this method fails.

Below programs illustrate setChar() method:

Program 1:

Output:

Value of lastNamePrefix before applying setChar is S
Value of lastNamePrefix after applying setChar is B
Value of firstNamePrefix before applying setChar is A
Value of firstNamePrefix after applying setChar is Z

Program 2:

Output: