从springboot的启动动态加载中发现使用LinkedHashSet给ArrayList去重并保持顺序,程序员大本营,技术文章内容聚合第一站。
List:有序、索引、可以重复 List的特有方法:与索引相关的add\set\remove 迭代器的并发修改异常:在取元素的同时,继续往里面添加元素(下面包异常) 数组查询快,增删慢;链表查询慢,增删快 ArrayList:增删慢,查询快 LinkedList:增删快,查询慢 LinkedList的特有方法:addFirst addLast getFirst getLast(不能多...Java集合...
Some points about LinkedHashSet LinkedHashSet implements Set interface and extends HashSet class. LinkedHashSet maintains insertion order, so when you will be able to access elements in the order they were inserted like ArrayList. Example: LinkedHashSetMain.java 1 2 3 4 5 6 7 8 9 10 11 ...
Learn about LinkedHashMap and LinkedHashSet in Java, their features, differences, and how to use them effectively in your Java applications.
package main import ( "encoding/json" "fmt" "github.com/emirpasic/gods/lists/arraylist" ) func main() { list := arraylist.New() list.Add("a", "b", "c") bytes, err := json.Marshal(list) // Same as "list.ToJSON(list)" if err != nil { fmt.Println(err) } fmt.Println(str...
package main import ( "encoding/json" "fmt" "github.com/emirpasic/gods/lists/arraylist" ) func main() { list := arraylist.New() list.Add("a", "b", "c") bytes, err := json.Marshal(list) // Same as "list.ToJSON(list)" if err != nil { fmt.Println(err) } fmt.Println(str...
Marshal(m) // Same as "m.ToJSON(m)" if err != nil { fmt.Println(err) } fmt.Println(string(bytes)) // {"a":"1","b":"2","c":"3"} } Typical usage for value-only structures: package main import ( "encoding/json" "fmt" "github.com/emirpasic/gods/lists/arraylist" ) ...
package main import ( "encoding/json" "fmt" "github.com/emirpasic/gods/lists/arraylist" ) func main() { list := arraylist.New() list.Add("a", "b", "c") bytes, err := json.Marshal(list) // Same as "list.ToJSON(list)" if err != nil { fmt.Println(err) } fmt.Println(str...
package main import ( "encoding/json" "fmt" "github.com/emirpasic/gods/lists/arraylist" ) func main() { list := arraylist.New() list.Add("a", "b", "c") bytes, err := json.Marshal(list) // Same as "list.ToJSON(list)" if err != nil { fmt.Println(err) } fmt.Println(str...
Marshal(m) // Same as "m.ToJSON(m)" if err != nil { fmt.Println(err) } fmt.Println(string(bytes)) // {"a":"1","b":"2","c":"3"} } Typical usage for value-only structures: package main import ( "encoding/json" "fmt" "github.com/emirpasic/gods/lists/arraylist" ) ...