If you are using a generic class or collection type with generics and you pass in a primitive type - short, int, long, float, double, char, boolean, you will get the below error either at the runtime or compile-time,
Compile Time Error: Type argument cannot be of primitive type
Run Time Error:
java: unexpected type
required: reference
found: intList<int> list = new ArrayList<>();
list.add(10);Fix:
You need to replace the primitive type with its respective Object type,
int -> Integer
byte -> Byte
short -> Short
long -> Long
float -> Float
double -> Double
char -> CharacterFixed Code:
List<Integer> list = new ArrayList<>();
list.add(10);If you are using an IDE like Eclipse or IntelliJ, you should get a hint on how to replace it,
More Posts related to Java,
- Create a Zip file using Java Code programmatically
- Eclipse : A java Runtime Environment (JRE) or Java Development kit (JDK) must be available
- How to Sort a LinkedList in Java
- Loading class com.mysql.jdbc.Driver. This is deprecated. The new driver class is com.mysql.cj.jdbc.Driver
- How to declare and initialize Array in Java Programming
- [Fix] java: integer number too large compilation error
- Java JDBC Connection with MySQL Driver in VS Code + Troubleshooting
- Reading .xls and .xlsx Excel file using Apache POI Java Library
- IntelliJ: Error: Could not find or load main class, java.lang.ClassNotFoundException
- How to get Client IP address using Java Code Example
- Truncate table using Java JDBC Example
- Struts 2 : There is no Action mapped for namespace [/] and action name [form] associated with context path [/proj]
- How to get file path in Idea IntelliJ IDE
- Java Generics explained with simple definition and examples
- Java SE 8 Update 301 available with various bug fixes and security improvements
- Java: Collect Stream as ArrayList or LinkedList
- Java JDBC Connection with PostgreSQL Driver Example
- How to check if Java main thread is alive
- How to fix Java nio NoSuchFileException wile reading a file
- Java 8+ get Day of the Week Examples with LocalDateTime, DateTime, ZonalDateTime and Instant classes
- Ways to Convert Integer or int to Long in Java
- [Java] How to throws Exception using Functional Interface and Lambda code
- [Fix] Spring Boot: mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
- Java: The value of the local variable string is not used
- Java JDBC: Insert Java 8 LocalDate and Time using PreparedStatement
More Posts:
- Fix: error: could not lock config file /etc/gitconfig: Permission denied - Git
- Change the background of Tkinter label or text - Python
- New-SPLogFile PowerShell - create new SharePoint log file - SharePoint
- Add imports in eclipse shortcut key combinations - Eclipse
- Type R is already defined error : Android Error - Android
- zsh: command not found [fix] macOS - zsh
- Save Screenshots on Mac in JPG instead of PNG Format - MacOS
- Notepad++ select all above or below lines - NotepadPlusPlus
