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What happens if we does not initialize variables of an interface in java?
In Java final is the access modifier which can be used with a filed class and a method.
- When a method if final it cannot be overridden.
- When a variable is final its value cannot be modified further.
- When a class is finale it cannot be extended.
Declaring final variable without initialization
If you declare a variable as final, it is mandatory to initialize it before the end of the constructor. If you don’t you will get a compilation error.
Example
In the following java program, we a have an interface with a public, static, final variable with name num and, a public, abstract method with name demo.
public interface MyInterface {
public static final int num;
public abstract void demo();
}Compile time error
On compiling, the above program generates the following error.
Output
MyInterface.java:2: error: = expected public static final int num; ^ 1 error
Updated on: 29-Jun-2020
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