Guava的常用方法示例

<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>{guava.version}</version>
</dependency>

List<Object> list = Lists.newArrayList();

Map<String, Map<String, List<Integer>>> map = Maps.newHashMap();

Map<String, Target> targetMap = Maps.uniqueIndex(List<Target>, new Function<Target, String>() {
    @Override
    public String apply(Target target) {
        return target.getId();
    }
});