length vs length() method in Java

There are following difference between variable length vs length() method in java.

length :-

It is a final variable, applicable only for Arrays.
It is represent the size of Arrays.

				
					public class LengthArray {
	public static void main(String[] args) {
		
		int a[] = { 12, 13, 14, 15 };
		System.out.println("total number of array data :- " + a.length);
	}
}

Output :- total number of array data :- 4

length() :-

It is a final method, applicable only for string object.
This method is represent number of character in the string.

				
					public class LengthString {
	public static void main(String[] args) {
		String e = "welcome";
		System.out.println("total number of character in the string :- " + e.length());
	}
}

Output :-
total number of character in the string :- 7