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I have a HashMap<String, String> representing a date (the key), and an amount (the value).

I would like to display this information on my interface. I began by using an ArrayList and adding a new JLabel to it for each new key & value that was added to the HashMap. However this led to display problems, and I also feel like it's not the right way to do this:

Iterator iterator = labels.entrySet().iterator();
    while (iterator.hasNext()) {
        Map.Entry pairs = (Map.Entry)iterator.next();
        entries.add(new JLabel(pairs.getKey() + ": £" + pairs.getValue()));
        for(JLabel entry : entries) {
            mainPanel.add(entry);
            for(int i = 0; i < entries.size() - 1; i+=2) {
                JLabel labelOne = entries.get(i);
                JLabel labelTwo = entries.get(i+1);
                mainPanelLayout.putConstraint(SpringLayout.NORTH, labelOne,
                    400,
                    SpringLayout.NORTH, contentPane);
                mainPanelLayout.putConstraint(SpringLayout.NORTH, labelTwo,
                    10,
                    SpringLayout.SOUTH, labelOne);

            }
            /*mainPanelLayout.putConstraint(SpringLayout.NORTH, entry,
                400,
                SpringLayout.NORTH, contentPane);*/
        }
    }

In terms of what I'm trying to achieve, I want to display the information like so:

21/04/13 : 300

22/04/13 : 400

Is there a way of displaying information from the HashMap in GUI?

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1 回答 1

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我将使用 JTable 并在一列中显示键的字符串表示形式，并在其他列中显示相应值的重要字段的字符串表示形式。我认为最重要的一步是创建一个像样的 TableModel 来保存数据。它可以使用 Map 作为其数据核心，但 Map 需要以某种方式可排序，我认为这样才能正常工作，可能是 LinkedHashMap 或 TreeMap。

于 2013-04-21T15:53:05.437 回答