switch

private static String createPlayer(PlayerTypes playerType) {
switch (playerType) {
case TENNIS:
return "网球运动员费德勒";
case FOOTBALL:
return "足球运动员C罗";
case BASKETBALL:
return "篮球运动员詹姆斯";
case UNKNOWN:

case BREAK:

return ""
throw new IllegalArgumentException("未知");
default:
throw new IllegalArgumentException(
"运动员类型: " + playerType)

}
}