java - 从迭代中返回值列表

Question

当我使用下面的代码迭代 HashMap 列表时，我得到的键和值如下

    System.out.println( "   (" + key + "," + value + ")" )

但我希望我的值返回为

键 1:值 1

键 1:值 2

键 2:值 1

键 2:值 2...依此类推。有人可以帮帮我吗？

    public static void main(String[] args)  {
    Map<String, List<String>> conceptMap = new HashMap<String, List<String>>();
    Map<String, List<String>> PropertyMap = new HashMap<String, List<String>>();
    try{
    Scanner scanner = new Scanner(new   FileReader("C:/"));

        while (scanner.hasNextLine()){
        String nextLine = scanner.nextLine();
        String [] column = nextLine.split(":");
        if (column[0].equals ("Property")){
        if (column.length == 4) {
        PropertyMap.put(column [1], Arrays.asList(column[2], column[3]));   
            }
        else {
        conceptMap.put (column [1], Arrays.asList (column[2], column[3]));
            }
        }
        }
        Set<Entry<String, List<String>>> entries =PropertyMap.entrySet();
          Iterator<Entry<String, List<String>>> entryIter = entries.iterator();
          System.out.println("The map contains the following associations:");
          while (entryIter.hasNext()) {
             Map.Entry entry = (Map.Entry)entryIter.next();
             Object key = entry.getKey();  // Get the key from the entry.
             Object value = entry.getValue();  // Get the value.
             System.out.println( "   (" + key + "," + value + ")" );
          }
        scanner.close();

        }   

        catch (Exception e) {
        e.printStackTrace();
        } 

Answer 1

替换这个:

 System.out.println( "   (" + key + "," + value + ")" );

与

for (Object listItem : (List)value) {
    System.out.println(key + ":" + listItem);
}