This example shows you how to display a percentage % in String.format.
JavaStringFormat1.java
package com.mkyong;
public class JavaStringFormat1 {
public static void main(String[] args) {
String result = String.format("%d%", 100);
System.out.println(result);
}
}
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)
Solution
To display or escape a single %, we need to put two %%.
JavaStringFormat2.java
package com.mkyong;
public class JavaStringFormat2 {
public static void main(String[] args) {
String result = String.format("%d%%", 100); // 100%
System.out.println(result);
}
}
Output
100%
