在Java7我有这样的代码:如何计算与Streams谓词匹配的元素数量?
public int getPlayersOnline() {
int count = 0;
for (Player player : players) {
if (player.isActive()) {
count++;
}
}
return count;
}
我试图用Java 8层的功能尽可能,我怎么能去与lambda表达式改善呢?
是''players'的Player'一个ArrayList? –