在从外部文件添加项目到 JComboBox in Java 时,我需要一些帮助。
到目前为止,这是我的代码:
//Loading the Names:
File Names_File = new File("Data" + File.separator + "Names.txt");
FileInputStream fis = null;
BufferedInputStream bis = null;
DataInputStream dis = null;
String str_Data = ""; //For storing the input from the file.
try
{
fis = new FileInputStream(Names_File);
// Here BufferedInputStream is added for fast reading.
bis = new BufferedInputStream(fis);
dis = new DataInputStream(bis);
str_Data = dis.readLine(); //Reading the line from the file.
StringTokenizer st = new StringTokenizer(str_Data); //Tokenizing the line.
//The below line adds only one item. The objective is adding all the items.
//*** Requesting help here ***
cmb_Name.addItem(st.nextToken("|"));
//*** Requesting help here ***
// Disposing and closing all the resources after using them.
fis.close();
bis.close();
dis.close();
}
catch (FileNotFoundException e)
{
System.err.println("Error: File not found!");
JOptionPane.showMessageDialog(null, "Error: File not found!", "Error Message",
JOptionPane.ERROR_MESSAGE);
}
catch (IOException e)
{
System.err.println("Error: Unable to read from file!");
JOptionPane.showMessageDialog(null, "Error: Unable to read from file!", "Error Message",
JOptionPane.ERROR_MESSAGE);
}
主要是外部文件的格式如下:
詹姆斯|罗伯特|爱丽丝
名称由“|”符号分隔。
上面的代码在这个例子中只添加了一个元素(“James”)。我需要在循环或其他东西中添加所有三个。我的想法是,我不确定我的外部文件中会有多少名字。因此使用简单的计数器将无济于事。
非常感谢任何建议!
提前感谢您的帮助
答案 0 :(得分:1)
试试这个:
StringTokenizer st = new StringTokenizer(str_Data); //Tokenizing the line.
while(st.hasMoreTokens()) {
cmb_Name.addItem(st.nextToken("|"));
}