java 如何从文本文件填充 JComboBox？
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How do I populate JComboBox from a text file?
提问by Magwich
How do I populate a JComboBoxfrom a text file?
如何JComboBox从文本文件填充 a ？
回答by I82Much
Very vague question. Are you saying you want one entry per line? If so you want to use something like a BufferedReader, read all the lines, save them as a String array. Create a new JComboBox passing in that String constructor.
很模糊的问题。你是说每行一个条目？如果是这样，您想使用 BufferedReader 之类的东西，请读取所有行，将它们保存为 String 数组。创建一个传入该 String 构造函数的新 JComboBox。
BufferedReader input = new BufferedReader(new FileReader(filePath));
List<String> strings = new ArrayList<String>();
try {
String line = null;
while (( line = input.readLine()) != null){
strings.add(line);
}
}
catch (FileNotFoundException e) {
System.err.println("Error, file " + filePath + " didn't exist.");
}
finally {
input.close();
}
String[] lineArray = strings.toArray(new String[]{});
JComboBox comboBox = new JComboBox(lineArray);
回答by trashgod
回答by camickr
Break down your requirements into separate steps and the code will follow:
将您的需求分解为单独的步骤，代码将遵循：
1) read a line of data from the file 2) use the JComboBox addItem(...) method to add the data to the combo box
1) 从文件中读取一行数据 2) 使用 JComboBox addItem(...) 方法将数据添加到组合框
