Where to use the final modifier in Java

For the final variable in Java, the Java compiler is optimized. Every place that uses the final type variable is not accessed through a connection. For example, the test class uses a final int digit fnumber=77 in the data class, at which point the Java compiler compiles the 77 constant to the test class's instruction code or constant pool. This way, every time the test class uses fnumber, it is not connected to the data class by reference, but rather uses the copy that is saved in the class file directly.

To speak with a program:

C:\>javac Test.javaTest.java:
public class test{
public static void Main (string[] args) {
System.out.println (Data.fnumber);
}
}

Data.java:

public class data{
public static final int fnumber=77;
}
To execute commands and results:

C:\>javac Test.javac:\>javac Test.java

C:\>java Test
77

C:\>