List<List<Rule>> partitionList = Lists.partition(rules, partitions);
可以对list进行分区
-------------------------
package com.tristan;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import com.google.common.base.Optional;
import com.google.common.base.Predicate;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.BiMap;
import com.google.common.collect.Collections2;
import com.google.common.collect.HashBasedTable;
import com.google.common.collect.HashBiMap;
import com.google.common.collect.HashMultiset;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMultiset;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multiset;
import com.google.common.collect.ObjectArrays;
import com.google.common.collect.Sets;
import com.google.common.collect.Table;
public class TestGuava {
public static void main(String[] args) {
// 集合申明
// t1();
// 集合初始化
// t2();
// 新的集合
//一种key可以重复的map
//multimap();
multimap2();
/* //可以重复的set 可以统计重复数
multiset();
//相当于有两个key的map
table();
//双向map
biMap();*/
}
private static void biMap() {
BiMap<Integer,String> biMap=HashBiMap.create();
biMap.put(1,"hello");
biMap.put(2,"helloa");
biMap.put(3,"world");
biMap.put(4,"worldb");
biMap.put(5,"my");
biMap.put(6,"myc");
int value= biMap.inverse().get("my");
System.out.println("my --"+value);
}
private static void table() {
Table<Integer,Integer,Person> personTable=HashBasedTable.create();
personTable.put(1,20,new Person(1, 1, "a", "46546", 1, 20));
personTable.put(0,30,new Person(2, 1, "ab", "46546", 0, 30));
personTable.put(0,25,new Person(3, 1, "abc", "46546", 0, 25));
personTable.put(1,50,new Person(4, 1, "aef", "46546", 1, 50));
personTable.put(0,27,new Person(5, 1, "ade", "46546",0, 27));
personTable.put(1,29,new Person(6, 1, "acc", "46546", 1, 29));
personTable.put(0,33,new Person(7, 1, "add", "46546",0, 33));
personTable.put(1,66,new Person(8, 1, "afadsf", "46546", 1, 66));
Person person = personTable.get(1, 29);
System.out.println(person.f3);
Map<Integer,Person> rowMap= personTable.row(0);
int maxAge= Collections.max(rowMap.keySet());
System.out.println(maxAge);
}
private static void multiset() {
Multiset<Integer> multiSet = HashMultiset.create();
multiSet.add(10);
multiSet.add(30);
multiSet.add(30);
multiSet.add(40);
System.out.println( multiSet.count(30)); // 2
System.out.println( multiSet.size()); //4
for (Integer integer : multiSet) {
System.out.println(integer);
}
}
private static void multimap() {
Multimap<String, Person> customersByType = ArrayListMultimap.create();
customersByType.put("abc", new Person(1, 1, "a", "46546", 1, 20));
customersByType.put("abc", new Person(1, 1, "a", "46546", 1, 30));
customersByType.put("abc", new Person(1, 1, "a", "46546", 1, 40));
customersByType.put("abc", new Person(1, 1, "a", "46546", 1, 50));
customersByType.put("abcd", new Person(1, 1, "a", "46546", 1, 50));
customersByType.put("abcde", new Person(1, 1, "a", "46546", 1, 50));
for (Person person : customersByType.get("abc")) {
System.out.println(person.age);
}
}
private static void multimap2() {
Multimap<String, String> multimap = ArrayListMultimap.create();
multimap.put("abc","a");
multimap.put("abc", "b");
multimap.put("abc", "c");
multimap.put("abc", "c");
multimap.put("abcd", "a");
Collection<Entry<String, String>> entries = multimap.entries();
for (Entry<String, String> entry : entries) {
System.out.println(entry.getKey() +" " + entry.getValue());
}
}
private static void t2() {
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");
// 2,简化集合的初始化
List<Person> personList2 = Lists.newArrayList(new Person(1, 1, "a", "46546", 1, 20), new Person(2, 1, "a",
"46546", 1, 20));
Set<Person> personSet2 = Sets.newHashSet(new Person(1, 1, "a", "46546", 1, 20), new Person(2, 1, "a", "46546",
1, 20));
Map<String, Person> personMap2 = ImmutableMap.of("hello", new Person(1, 1, "a", "46546", 1, 20), "fuck",
new Person(2, 1, "a", "46546", 1, 20));
}
private static void t1() {
Map<String, Map<String, String>> map = Maps.newHashMap();
List<List<Map<String, String>>> list = Lists.newArrayList();
List<Person> personList = Lists.newArrayList();
Set<Person> personSet = Sets.newHashSet();
Map<String, Person> personMap = Maps.newHashMap();
Integer[] intArrays = ObjectArrays.newArray(Integer.class, 10);
}
}
class Person {
int id;
int f2;
String f3;
String f4;
int sex;
int age;
public Person(int f1, int f2, String f3, String f4, int f5, int f6) {
super();
this.id = f1;
this.f2 = f2;
this.f3 = f3;
this.f4 = f4;
this.sex = f5;
this.age = f6;
}
}
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