OnJava8-Examples/collectionsindepth/LinkedHashMapDemo.java

// collectionsindepth/LinkedHashMapDemo.java
// (c)2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
// What you can do with a LinkedHashMap
import java.util.*;
import onjava.*;

public class LinkedHashMapDemo {
  public static void main(String[] args) {
    LinkedHashMap<Integer,String> linkedMap =
      new LinkedHashMap<>(new CountMap(9));
    System.out.println(linkedMap);
    // Least-recently-used order:
    linkedMap = new LinkedHashMap<>(16, 0.75f, true);
    linkedMap.putAll(new CountMap(9));
    System.out.println(linkedMap);
    for(int i = 0; i < 6; i++) // Cause accesses:
      linkedMap.get(i);
    System.out.println(linkedMap);
    linkedMap.get(0);
    System.out.println(linkedMap);
  }
}
/* Output:
{0=A0, 1=B0, 2=C0, 3=D0, 4=E0, 5=F0, 6=G0, 7=H0, 8=I0}
{0=A0, 1=B0, 2=C0, 3=D0, 4=E0, 5=F0, 6=G0, 7=H0, 8=I0}
{6=G0, 7=H0, 8=I0, 0=A0, 1=B0, 2=C0, 3=D0, 4=E0, 5=F0}
{6=G0, 7=H0, 8=I0, 1=B0, 2=C0, 3=D0, 4=E0, 5=F0, 0=A0}
*/