Google Collections 、guava 简单使用


简化集合的创建

List<Person> personList= Lists.newLinkedList();

Set<Person> personSet= Sets.newHashSet();

Map<String,Person> personMap= Maps.newHashMap();

Integer[] intArrays= ObjectArrays.newArray(Integer.class,10);

简化集合的初始化

Set<String> set = Sets.newHashSet("one","two","three");

List<String> list = Lists.newArrayList("one","two","three");

Map<String, String> map = ImmutableMap.of("ON","TRUE","OFF","FALSE");

 

List<Person> personList2= Lists.newArrayList(new Person(1,  "Ryu"), new Person(2, "Ken"));

Set<Person> personSet2= Sets.newHashSet(new Person(1, "Ryu"), new Person(2, "Ken"));

Map<String,Person> personMap2= ImmutableMap.of("p1", new Person(1, "Ryu"), "p2", new Person(2, "Ken"));

最新maven坐标(Dec 09, 2015) ：

<dependency>

 <groupId>com.google.guava</groupId>

 <artifactId>guava</artifactId>

 <version>19.0</version>

</dependency>