Use a regex to match emoji characters in a string. For example:
import java.util.regex.Pattern;
public class ReplaceEmojis {
public static void main(String[] args) {
String text = "That's a nice joke ??? ?";
String replaced = text.replaceAll("[\p{Extended_Pictographic}]", "[e]");
System.out.println(replaced); // That's a nice joke [e][e][e] [e]
}
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