Char cannot be dereferenced error

Question

I m trying to use the char method isLetter    which is supposed to return boolean value corresponding to whether the character is a letter  But when I call the method  I get an error stating that  char cannot be dereferenced   I don t know what it means to dereference a char or how to fix the error  the statement in question is   if  ch isLetter                     Any help  What does it mean to dereference a char and how do I avoid doing so

User · Answer

The type char is a primitive -- not an object -- so it cannot be dereferenced

Dereferencing is the process of accessing the value referred to by a reference. Since a char is already a value (not a reference), it can not be dereferenced.

use Character class:

if(Character.isLetter(c)) {

User · Answer

If Character isLetter ch  looks a bit wordy ugly you can use a static import   import static java lang Character      if isLetter ch        else if isDigit ch

User · Answer

A char doesn t have any methods - it s a Java primitive  You re looking for the Character wrapper class   The usage would be   if Character isLetter ch

User · Answer

I guess ch is a declared as char  Since char is a primitive data type and not and object  you can t call any methof from it  You should use Character isLetter ch

[java] "Char cannot be dereferenced" error

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