你能帮我使用 Java 8 流 API 编写以下内容吗?
SuperUser superUser = db.getSuperUser;
for (final Client client : superUser) {
if (cartData.getClient().equals(client.getUid())) {
client.setIsSelected(true);
break;
}
}
感谢您的帮助!
除了其他答案之外,我还想补充一点,每次在循环中调用cartData.getClient()
都是次优的,而是在循环开始之前缓存它,如下所示:
T tempClient = cartData.getClient(); // where T is the type returned by getClient()
然后你可以做:
superUser.stream() // or Arrays.steam(superUser) if superUser is an array
.filter(c -> tempClient.equals(c.getUid()))
.findFirst()
.ifPresent(client -> client.setIsSelected(true));
或:
superUser.stream() // or Arrays.steam(superUser) if superUser is an array
.filter(c -> tempClient.equals(c.getUid()))
.limit(1)
.forEach(client -> client.setIsSelected(true));
如何使用 Java 8 流编写代码:
SuperUser superUser = db.getSuperUser;
for (final Client client : superUser) {
if (cartData.getClient().equals(client.getUid())) {
client.setIsSelected(true);
break;
}
}
For-each 似乎不是这项工作的合适工具。你可以试试:
superUser.stream()
.filter(c -> cartData.getClient().equals(c.getUid()))
.findFirst().ifPresent(c -> c.setIsSelected(true));