Character#getName(int codepoint) を使う
package hello;
public class HelloCharacterName {
public static void main(String[] args) {
int codepoint = (int) 0x1F603; // 笑顔絵文字
String name = Character.getName(codepoint);
System.err.println(name);
}
}
■結果
SMILING FACE WITH OPEN MOUTH