Difference between length and length() in Java
In modern IDEs there is the autocompletion feature that offers Java keywords or variables declared in our class, and without this feature, how Know The size of a table? And how do you know the size of a Thong? Developers of all levels (beginner or expert) can't distinguish between lenght and lenght() correctly, and since the IDE corrects this problem, it still remains incomprehensible. In this article we will look at some concepts about arrays, strings in Java.
The simplest answer is that lenght is used to retrieve the size of an array, and lenght() is a method that returns the size of a string.
An array can be created with two methods:
The second method is to instantiate a new array by specifying the type, number of elements:
The data structure of a String is a table of Char. There is no need to define an attribute that is not needed for each application. Unlike the C language, a character array is not a String in Java. String is dynamic in nature, but the length. The designers of java have thought of it and they decided to make it easier and avoid mistakes for developers by creating the method. length().
References:
Javadoc: Arrays
StackOverFlow: Why isn't there a java.lang.Array class?
The simplest answer is that lenght is used to retrieve the size of an array, and lenght() is a method that returns the size of a string.
int[] array = new int[5];The question is why the array has an attribute lenght but not string and vice-vers-that?
System.out.println(array.length);//length for arrays
String str = "string";
System.out.println(str.length()); length() for string
Why do arrays in Java have the lening property?
An array is a container of objects of a specific type that stores a limited number of elements. Once the board is created, its size will never change and remains fixed. That's why the lenght is declared as a variable final And that is why lenght is considered an attribute that defines an array when it is created.An array can be created with two methods:
- Initialize a new array with values.
- Instantiate a new array by specifying its size.
Initializing an array with values creates a new array with a size corresponding to the number of comma-separated elements.
int[] tab = {1,2,3}; The second method is to instantiate a new array by specifying the type, number of elements:
String[] tab = new String[3];
Why is there no Array class defined as String?
An array is an object and each array has a class Object The following statement is legal:
Object obj = new String[20];
An array encompasses all the methods and attributes inherited from the class Object (except clone). Why is there no definition of the Array class? We can't find the definition of the Array class, one explanation is that it is hidden from us. If you think about it a bit, if there's an Array class, what did it look like? She would still need a board to store the items, right? That's why it's a bad idea to define such a class. In fact, you can get the class of an array by calling the method getClass():
int[] tab = new int[2];Output:
System.out.println(tab.getClass());
class [I
Why does String have the length()?
References:
Javadoc: Arrays
StackOverFlow: Why isn't there a java.lang.Array class?