[移动开发]Matcher和CollUtil.lastIndexOf 用法

匹配集合最后一个满足条件的元素 CollUtil.lastIndexOf()

List<String> list = CollUtil.newArrayList("AngelaBaby", "Baby", "smallBaby");
int baby2 = CollUtil.lastIndexOf(list, s -> s.contains("Baby"));
System.out.println("baby = " + baby);

baby2 = 2

自己定义是否满足写法

        List<String> list = CollUtil.newArrayList("AngelaBaby", "Baby", "smallBaby");

        int baby = CollUtil.lastIndexOf(list, new Matcher<String>() {
            @Override
            public boolean match(String s) {
                return s.contains("Baby");
            }
        });
        System.out.println("baby = " + baby);

baby = 2

Matcher 用法

        //普通业务集合
        List<Person> personList = new ArrayList<>();
        personList.add(new Person("12", "洛欣", 26));
        personList.add(new Person("13", "祺欣", 24));
        personList.add(new Person("14", "小康", 28));
        personList.add(new Person("15", "明鹏", 25));
        personList.add(new Person("16", "小轩轩", 22));
        personList.add(new Person("17", "宇明", 27));

        int index = CollUtil.indexOf(personList, p -> StrUtil.startWith(p.getName(), "小"));
        System.out.println("index = " + index);

        Matcher<Person> matcher = new Matcher<Person>() {
            @Override
            public boolean match(Person person) {
                String name = person.getName();
                if (name.length() >= 3 && StrUtil.startWith(name, "小")) {
                    return true;
                }
                return false;
            }
        };

        int index2 = CollUtil.indexOf(personList, matcher);
        System.out.println("index2 = " + index2);

index = 2
index2 = 4

依赖

        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.7.15</version>
        </dependency>