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Java知识碎片

数组转List集合

1.String[]

String[] stringArray = {"hello","world","B"};
List<String> stringB = Arrays.asList(stringArray);
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2.int[]

int[] intArray = {1, 2, 3, 4};
List<Integer> list = Ints.asList(intArray);

//Java List集合过滤，不用写双重for循环这么麻烦了
String condition="K101,1461";
//根据条件过滤出符合的车次-只保留K101,1461车次
if (condition != null && !condition.equals("")) {
    condition=condition.toUpperCase();
    List<String> lsFilter=Arrays.asList(condition.split(","));
    finalTickets= finalTickets.stream()
            .filter((TicketInfo info) -> lsFilter.contains(info.getStation_train_code().toUpperCase()))
            .collect(Collectors.toList());
}
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List集合过滤

不用写双重for循环这么麻烦了

String condition="K101,1461";
//根据条件过滤出符合的车次-只保留K101,1461车次
if (condition != null && !condition.equals("")) {
    condition=condition.toUpperCase();
    List<String> lsFilter=Arrays.asList(condition.split(","));
    finalTickets= finalTickets.stream()
            .filter((TicketInfo info) -> lsFilter.contains(info.getStation_train_code().toUpperCase()))
            .collect(Collectors.toList());
}
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