How to Fix a Java.util.MissingFormatArgumentException Error With Format Specifier '%s'


If you’re a Java programmer and you are dealing with the Java.util.MissingFormatArgumentException error, you’re in the right place. This document is here to provide valuable information and a step-by-step solution to get you back up and running.

What Is Java.util.MissingFormatArgumentException?

Java.util.MissingFormatArgumentException is a runtime error that’s thrown when Java’s format specifiers (including “%s”) fail to match any of the arguments passed in. In other words, the error occurs when you pass in the wrong type of argument. This is why it’s important to know exactly what type of argument you should be passing in.

How to Fix Java.util.MissingFormatArgumentException

  1. Make sure the argument being passed matches the type of format specifier being used. For example, if you’re using a format specifier of “%s”, the argument should be of type String.
  2. Check for any typos in the code. For example, double-checking the format specifier being used and ensuring that the argument being passed is in the correct order.
  3. Check for any missing arguments. In some cases, Java may fail to recognize the format specifiers when arguments are missing.
  4. If this error is being thrown while using a logging framework, make sure that the configuration is correct.


Q: What do I do if the type of argument matches the format specifier but the Java.util.MissingFormatArgumentException error is still being thrown?

A: Double-check the order of the arguments passed in and make sure they match the format specifier. If this doesn’t work, try replacing the String arguments with Objects.

Q: Is there a way to prevent this error from happening?

A: Yes. A good practice for avoiding this error is to always make sure that the arguments passed in match the format specifier. Additionally, make sure that the order of the arguments is correct for the specifier being used.

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