String message = String.format("Hello! My name is %s, I'm %s.", name, age); 

// String templates have been introduced in JAVA21, they work as follows :

String feelsLike = "hot";

long temperature = 52;

TemperatureUnit unit = TemperatureUnit.CELSIUS;

String message = "Today's weather is \{ feelsLike }, with a temperature of \{ temperature } degrees \{ unit }" ;

String template = "status is %s, data key is %s"

String result = String.format(template, status, key);

​

Map<String, String> valuesMap = new HashMap<String, String>();

 valuesMap.put("animal", "quick brown fox");

 valuesMap.put("target", "lazy dog");

 String templateString = "The ${animal} jumped over the ${target}.";

 StringSubstitutor sub = new StringSubstitutor(valuesMap);

 String resolvedString = sub.replace(templateString);