我有一个包含以下信息的文本文件:
dog
sheep
cat
horse
cat
tiger
cat
cat
tiger
在另一个Q&A ,我问人们如何统计所有动物的出现,我用这个方法做到了:
void countAnimals(){
Map m1 = new HashMap();
try (BufferedReader br = new BufferedReader(new FileReader("Animals.txt"))) {
StringBuilder sb = new StringBuilder();
String line = br.readLine();
while (line != null) {
String[] words = line.split(" ");//those are your words
for (int i = 0; i < words.length; i++) {
if (m1.get(words[i]) == null) {
m1.put(words[i], 1);
} else {
int newValue = Integer.valueOf(String.valueOf(m1.get(words[i])));
newValue++;
m1.put(words[i], newValue);
}
}
sb.append(System.lineSeparator());
line = br.readLine();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Map<String, String> sorted = new TreeMap<String, String>(m1);
for (Object key : sorted.keySet()) {
System.out.println(key + "\t Votes: " + m1.get(key));
}
}
这是控制台打印出来的内容:
cat Votes: 4
dog Votes: 1
horse Votes: 1
sheep Votes: 1
tiger Votes: 2
有人可以帮助我如何将现在打印到控制台的信息放入二维数组中,然后将其放入 JTable
中吗?
更新:这是我添加到 countAnimals
方法中的内容:
Map<String, String> sorted = new TreeMap<String, String>(m1);
for (Object key : sorted.keySet()) {
System.out.println(key + "\t Votes: " + m1.get(key));
}
AnimalSummaryModel SOCLOSE = new AnimalSummaryModel(sorted);
SOCLOSE.run();
您提供的 AnimalSummaryModel
类如下所示:
class AnimalSummaryModel extends AbstractTableModel {
private final String[] keys;
private Map<String, String> data;
public AnimalSummaryModel(Map<String, String> data) {
this.data = data;
keys = data.keySet().toArray(new String[data.size()]);
}
public int getColumnCount() {
return 2;
}
public int getRowCount() {
return data.size();
}
public Object getValueAt(int row, int col) {
if (col == 0) {
return keys[row];
} else {
return data.get(keys[row]);
}
}
private void display() {
JFrame f = new JFrame("EnvTableTest");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(f, this);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
public void run() {
display();
}
}
我还是一事无成。
最佳答案
传递您的Map<String, String>
作为自定义 TableModel
的参数并使用该模型构建您的 JTable
。显示了完整的示例 here .
Map<String, String> sorted = new TreeMap<>();
data.put("cat", "Votes: 4");
data.put("tiger", "Votes: 2");
data.put("horse", "Votes: 1");
data.put("sheep", "Votes: 1");
data.put("dog", "Votes: 1");
JTable table = new JScrollPane(new JTable(new AnimalSummaryModel(sorted)));
…
private static class AnimalSummaryModel extends AbstractTableModel {
private final Map<String, String> data;
private final String[] keys;
public AnimalSummaryModel(Map<String, String> data) {
this.data = data;
keys = data.keySet().toArray(new String[data.size()]);
}
…
}
关于java - 如何将排序的 Map 转换为 JTable 的二维数组,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36968736/