Formating numbers makes wierd letter insead of comma.

[Dowie]

So, I'm trying to learn to format numbers, but when i try this code in the compiler it results in this:

public class FormatTest {
	public static void main(String[] args) {
		String y = String.format("%, d", 1000000000);
		System.out.println(y);
	}
}

Is there something I'm doing wrong here?

[wsaryada]

It should work fine that way. Is there anything special with your Windows command prompt? Try display the string using a Swing component to see if the command prompt is the problem. Use the code below.

JOptionPane.showMessageDialog(null, y);

[Dowie]

It shows this:



There is supposed to be commas instead of spaces there right?

[wsaryada]

Is there any possibility that it was not a comma that you type in your code? Which editor that you use to write the code? There something going on with the source file I guess.

[JosAH]

That funny character is a locale specific separator character but your font can't display it.

kind regards,

Jos

[wsaryada]

It means that the OP operating system default locale might be set to something that the output system can't display?

[JosAH]

It means that the OP operating system default locale might be set to something that the output system can't display?

Yep, the OP can check this by inspecting the DecimalFormatSymbols class; (the grouping character can be changed).

kind regards,

Jos

[DarrylBurke]

That funny character is a locale specific separator character but your font can't display it.

Good thinking, Jos.

The 'funny character' is the non-breaking space, "\00A0"

db

[DarrylBurke]

It means that the OP operating system default locale might be set to something that the output system can't display?

I'm not about to change my system locale to check, but I wouldn't expect any Windows command prompt to display a non-breaking space correctly.

No idea whether Linux/MacOS would be any different.

db

[JosAH]

Good thinking, Jos.

The 'funny character' is the non-breaking space, "\00A0"

That explains it all; look how that dialog displays the number; possibly that's how the OP's locale wants to display it (groups of three digits separated by a space character); of course that silly MS Windows shell can't display those characters ...

kind regards,

Jos