Java - How to escape % in String.format?

Introduction

In this tutorial, we will learn how to skip or display % in a String using String.format

MyStringFormatter .java 

public class MyStringFormatter {

 public static void main(String[] args) {

  System.out.println(String.format( "Your score is %d % " ,65) );

 }

}

Output

Exception in thread "main" java.util.UnknownFormatConversionException: Conversion = ' '

 at java.base/java.util.Formatter.checkText(Formatter.java:2732)

 at java.base/java.util.Formatter.parse(Formatter.java:2718)

 at java.base/java.util.Formatter.format(Formatter.java:2655)

 at java.base/java.util.Formatter.format(Formatter.java:2609)

 at java.base/java.lang.String.format(String.java:2897)

 at MyStringFormatter.main(MyStringFormatter.java:4)

Solution

To display a % in String when using String.format, you have to escape a % with % i.e. %%

public class MyStringFormatter {

 public static void main(String[] args) {

  System.out.println(String.format( "Your score is %d %% " ,65) );

 }

}

Output

Your score is 65 %

Conclusion

In order to display a % using String.format, escape it with another % i.e. %%