gistfile1.txt

private final RecentFileList rfl = new RecentFileList(7);
    
    @Autowired
    private List<String> firstInsertBehaviour;

    @Test
    public void contextLoads() {}
    
    @Test
    @Description("Generation test")
    public void createRecentFileListTest() {
        assertNotNull(firstInsertBehaviour);
        System.out.println("First secuence for open files");
        System.out.println("Total elements to open: " + firstInsertBehaviour.size());
        
        System.out.println("Recent File List size: " + rfl.size());
        
        firstInsertBehaviour.stream().forEach(file -> {
            System.out.println("\n" + file + " opened? " + rfl.add(file));
            rfl.showList();
        });
    }

gistfile2.txt

@Bean
    List<String> firstInsertBehaviour() {
        List<String> result = new ArrayList<>();
        
        result.add("/home/gonza/myFile.txt");
        result.add("/home/gonza/another.txt");
        result.add("/home/gonza/myClass.java");
        result.add("/home/gonza/thisIsMyExample.txt");
        result.add("/home/gonza/gaming.txt");
        result.add("/home/gonza/bar.txt");
        result.add("/home/gonza/foo.txt");
        result.add("/home/gonza/first.txt");
        result.add("/home/gonza/example.txt");
        result.add("/home/gonza/for.txt");
        result.add("/home/gonza/my.txt");
        result.add("/home/gonza/TDD.txt");
        result.add("/home/gonza/training.txt");
        result.add("/home/gonza/voteForYou.txt");
        result.add("/home/gonza/happy.txt");
        result.add("/home/gonza/myFile.txt");
        result.add("/home/gonza/bar.txt");
        
        return result;
    }

RecentFileList

/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package com.demo.recentfilelist;

import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author gonzalo
 */
public class RecentFileList {
    
    private final int maxItems;
    private final List<String> files;
    
    public RecentFileList(int maxItems) {
        this.maxItems = maxItems;
        this.files = new ArrayList<>();
    }

    public RecentFileList() {
        this.maxItems = 15;
        this.files = new ArrayList<>();
    }
    
    public void showList() {
        System.out.println("Recent File list:");
        
        for (int i = 0; i < files.size(); i++) {
            System.out.println(i + ". " + files.get(i));
        }
    }
    
    public boolean add(String fileName) {
        if (fileName == null) {
            return false;
        }
        if (fileName.isEmpty()) {
            return false;
        }
        if (this.files.contains(fileName)) {
            this.files.remove(fileName);
            this.files.add(0,fileName);
            return true;
        }
        if (this.files.size() < this.maxItems) {
            this.files.add(0,fileName);
            return true;
        }
        this.files.add(0, fileName);
        this.files.remove(this.files.size() - 1);
        return true;
    }

    public int size() {
        return this.files.size();
    }
}