Way to format strings with "?" parameters to full string in java?

Question

For example I want to implement class with method

public class Logger {

    public void info(String message, String[] params) {
    }
}

If input is

new Logger().info("Info: param1 is ? , param2 is ?", new  String[] {"a", "b"});

Output must be

Info: param1 is a , param2 is b

What is the easiest way to implement it?

Answer 1

You can use the String.format(String format, Object ... args) method for this. Instead of using a ?, you can do C style %x format, where x can be d (for int), s (for string), etc.

Example.

Also, you can view the Formatter.format class method. It shows you all formatting flags acceptale for formatting (String.format() method uses Formatter to do the formatting).