Using String.format

Question

How to use String Formatter to concatenate strings. what I tried is not working.

  String description = "This is description,";
   String message = "This is message";

   String result = description + " " + message; //works fine.

   //I want to replace it using String.format.
   //I tried the below code and it does not work.

   String.format(description, " ", message);

Expected result is This is description This is message

What is the right way of using String.format.

Thanks R

In this case, it is totally fine to concatenate with + as the compiler will convert it to a StringBuilder anyways. — Korashen
– Korashen, Commented Nov 7, 2017 at 9:46

Korashen · Accepted Answer · 2017-11-07 10:11:40Z

2

Try this :

String.format("%s %s",description, message);

edited Nov 7, 2017 at 10:11

Korashen

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answered Nov 7, 2017 at 9:42

Indent

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3 Comments

BRDroid Over a year ago

Thank you for that, what is the difference between %s and just %. please

Indent Over a year ago

%s call toString(), % I don't know

Korashen Over a year ago

Using just % does not work (with 1.7). I think it's a typo and the correct answer would be %s %s. I submitted an edit.

Kevin Robatel · Accepted Answer · 2017-11-07 09:43:28Z

1

String.format("%s %s", description, message);

The function header:

public static String format(String format, Object... args)

You have to pass the format and the variables to set. Take a lot at the Javadoc.

answered Nov 7, 2017 at 9:43

Kevin Robatel

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Comments

Premkumar Manipillai · Accepted Answer · 2017-11-07 12:19:19Z

0

Code :

String description = "This is description %1$s";
String message = "This is message";
String finalText = String.format(description, message);

Output :

This is description This is message

answered Nov 7, 2017 at 12:19

Premkumar Manipillai

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