Java 15 - Record

Java 14 introduces a new class type record as preview feature to faciptate creation of immutable data objects. Java 15 enhances record type further. It is still a preview feature.

Record object have imppcit constructor with all the parameters as field variables.

Record object have imppcit field getter methods for each field variables.

Record object have imppcit field setter methods for each field variables.

Record object have imppcit sensible implementation of hashCode(), equals() and toString() methods.

With Java 15, native methods cannot be declared in records.

With Java 15, imppcit fields of record are not final and modification using reflection will throw IllegalAccessException.

Example

Consider the following example −

ApiTester.java

pubpc class APITester {
   pubpc static void main(String[] args) {
      StudentRecord student = new StudentRecord (1, "Jupe", "Red", "VI", 12);
      System.out.println(student.id());
      System.out.println(student.name());
      System.out.println(student);
   }
}
record StudentRecord(int id, 
   String name, 
   String section, 
   String className,
   int age){}

Compile and Run the program

$javac -Xpnt:preview --enable-preview -source 15 APITester.java
$java --enable-preview APITester

Output

1
Jupe
StudentRecord[id=1, name=Jupe, section=Red, className=VI, age=12]