CODEWITHSUNDEEP
java
user11795101
user11795101

Reputation:

How does java distinguish that the character is full-width or half-width?

I have these codes with the same variable names but the only difference is one type is full-width and the other is half-width. I was shocked that Java supports full-width characters as variable names. I was wondering how can Java differentiate the two characters.

public class Main {

    public static void main(String[] args) {
        int[] ｘ = { 1, 2, 3 };
        int[] x = { 1, 2, 3 };
        int[] ｙ = { 4, 5, 6 };
        int[] y = { 4, 5, 6 };
        int[] ｚ = new int[ｘ.length];
        int[] z = new int[ｘ.length];
        for (int i = 0; i < ｚ.length; i++) {
            ｚ[i] = ｘ[i] + ｙ[i];
            z[i] = x[i] + y[i];
        }
        System.out.println(ｚ);
        System.out.println(z);
    }
}

Upvotes: 3

Views: 550

Answers (3)

Abra
Abra

Reputation: 20913

From The Java Tutorials trail Learning the Java Language, lesson Language Basics, topic Variables

Variable names are case-sensitive. A variable's name can be any legal identifier — an unlimited-length sequence of Unicode letters and digits, beginning with a letter, the dollar sign "$", or the underscore character "_".

So in java code, you can even write variable names in Klingon

Upvotes: 2

bur&#230;quete
bur&#230;quete

Reputation: 14698

Java supports Unicode in source code, so ｘ (u'\uff58') is much more different than x (u'x')

Essentially different characters, same as having int[] a & int[] b

But for readability, this is a huge problem. Even though two different variables, it is very easy for another user to confuse these names. It is better stick to the basic Latin letters in their simple forms as much as possible within the source code.

Upvotes: 4

Paco Abato
Paco Abato

Reputation: 4065

I guess that your source code is encoded in UTF-8 (or some other "extended" character set) so the codes for ｘ and x are different (the machine does not care about the graphical representation of the character but the internal code).

Upvotes: 1

Related Questions