将数组存储在HashMap中 [英] Store an array in HashMap

问题描述

我是Java新手。我如何在HashMap中存储一个整数值的数组，然后我将这个HashMap写入一个txt文件中，但目前这并不重要。我可以存储单个字段，但不能存储数组。有任何想法吗 ？

  public void salveazaObiectulCreat（String caleSpreFisier）{
 
 HashMap map = new HashMap（）; 
 
 map.put（Autorul，numelePrenumeleAutorului）; 
 map.put（Denumirea cartii，denumireaCartii）; 
 map.put（Culoarea cartii，culoareaCartii）; 
 map.put（Genul cartii，gen）; 
 map.put（Limba，limba）; 
 map.put（Numarul de copii，numarulDeCopii）; 
 map.put（Numarul de pagini，numarulDePagini）; 
 map.put（Pretul cartii，pretulCartii）; 
 
尝试{
 
 File file = new File（caleSpreFisier）; 
 
 FileOutputStream f = new FileOutputStream（file）; 
 
 ObjectOutputStream s = new ObjectOutputStream（f）; 
 
 s.writeObject（map）; 
 
 s.close（）; 
 
} catch（Exception e）{
 
 System.out.println（发生异常）; 
 
 
 $ / code $ / pre 
 
解决方案
 
  HashMap< String，List< Integer>> map = new HashMap< String，List< Integer>>（）; 
 HashMap< String，int []> map = new HashMap< String，int []>（）; 
  
选择一个，例如 
 
 
  HashMap< String，List< Integer>> map = new HashMap< String，List< Integer>>（）; 
 map.put（Something，new ArrayList< Integer>（））; 
 for（int i = 0; i  map.get（Something）。add（coeficientUzura [i]）; 
 
  
或者只是 
 
 
  HashMap< String，int []> map = new HashMap< String，int []>（）; 
 map.put（Something，coeficientUzura）; 
  
 
i'm new to Java. How can i store an array of integers values in a HashMap, after that i write this HashMap in a txt file  but this isn't important at the moment. I can store single fields but not an array. Any ideas ? 
public void salveazaObiectulCreat(String caleSpreFisier) {

    HashMap map = new HashMap();

    map.put ("Autorul",numelePrenumeleAutorului);
    map.put ("Denumirea cartii",denumireaCartii);
    map.put ("Culoarea cartii",culoareaCartii);
    map.put ("Genul cartii",gen);
    map.put ("Limba",limba);
    map.put ("Numarul de copii",numarulDeCopii);
    map.put ("Numarul de pagini",numarulDePagini);
    map.put ("Pretul cartii",pretulCartii);

  try  {

      File file = new File(caleSpreFisier);  

      FileOutputStream f = new FileOutputStream(file);  

      ObjectOutputStream s = new ObjectOutputStream(f);          

      s.writeObject(map);

      s.close();

       } catch(Exception e){

           System.out.println("An exception has occured");     
    }   
}

解决方案
HashMap<String, List<Integer>> map = new HashMap<String, List<Integer>>();
HashMap<String, int[]> map = new HashMap<String, int[]>();
pick one, for example
HashMap<String, List<Integer>> map = new HashMap<String, List<Integer>>();
map.put("Something", new ArrayList<Integer>());
for (int i=0;i<numarulDeCopii; i++) {
    map.get("Something").add(coeficientUzura[i]); 
}
or just
HashMap<String, int[]> map = new HashMap<String, int[]>();
map.put("Something", coeficientUzura);


                        
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