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How to check if a class is a local class in Java
Ravi
A class declared within another class is known as a nested class. A non-static nested class is known as an inner class or a local class.
Note: We can refer to What is an inner class in Java? to learn more about inner or local classes.
The isLocalClass() method
The isLocalClass() method in Java checks whether a class is a local class.
Syntax
The syntax for the method is as follows:
public boolean isLocalClass()
Parameters
The method doesn’t take any parameters.
Returns
This method returns a Boolean value. It returns true if the class is a local class. Otherwise, it returns false.
Coding example
import java.util.Arrays;
public class Main {
public static void main(String[] args){
class LocalInnerClass{
void print(){
System.out.println("I'm a local class/local inner class");
}
}
LocalInnerClass localInnerClassObject = new LocalInnerClass();
System.out.printf("Is %s a local class - %s", localInnerClassObject, localInnerClassObject.getClass().isLocalClass());
System.out.println();
Class<?> arraysClass = Arrays.class;
System.out.printf("Is %s a local class - %s", arraysClass, arraysClass.isLocalClass());
}
}Using the isLocalClass() method
Code explanation
- Line 1: We import the
Arraysclass. - Lines 7 to 11: We create a local inner class named
LocalInnerClass. We define it withprint()method that prints a string. - Line 13: We create an instance of
LocalInnerClassnamedlocalInnerClassObject. - Line 14: We use the
isLocalClass()method to the check if thelocalInnerClassObjectis a local class. - Line 17: We retrieve the class object of the
Arraysclass using the.classproperty, and assign it to thearraysClassvariable. - Line 18: We check if the
arraysClassis a local class using theisLocalClass()method.
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