[英]Attempting to add items to jList from txt File
I have the following try catch block that executes on a button click.我有以下在单击按钮时执行的 try catch 块。
try {
//picking up the file I want to read in
BufferedReader in = new BufferedReader(new FileReader("C:\\users\\me\\desktop\\blah.txt"));
String line;
try {
//read through the file until there is nothing left and add each line to list
while((line = in.readLine()) != null){
jList1.add(line, jList1);
}
} catch (IOException ex) {
Logger.getLogger(Frame2.class.getName()).log(Level.SEVERE, null, ex);
}
} catch (FileNotFoundException ex) {
Logger.getLogger(Frame2.class.getName()).log(Level.SEVERE, null, ex);
}
I can successfully System.out.println(line)
so I know something is working right.我可以成功System.out.println(line)
所以我知道有些东西工作正常。 I am unable to populate the list with the lines from the text file.我无法使用文本文件中的行填充列表。 The above code tells me I cannot add containers parent to self.
上面的代码告诉我cannot add containers parent to self.
Attempting to find more information has only confused me more.试图找到更多信息只会让我更加困惑。 I have come across some places that say jLists are more complciated than this?我遇到过一些地方说 jLists 比这更复杂?
There are many mistakes present, too many to comment on all of them:存在许多错误,太多了,无法对所有错误发表评论:
2)Exceptions 2)例外情况
3) How to Use Lists 3)如何使用列表
BufferedReader in = null;
String line;
DefaultListModel listModel = new DefaultListModel();
try {
in = new BufferedReader(new FileReader("C:\\users\\me\\desktop\\blah.txt"));
while ((line = in.readLine()) != null) {
listModel.addElement(line); //(String.valueof(line));
}
} catch (IOException ex) {
Logger.getLogger(Frame2.class.getName()).log(Level.SEVERE, null, ex);
} finally {
if (in != null) {
in.close();
}
}
JList jList1 = new JList(listModel);
You really cannot do it: Read again this line: jList1.add(line, jList1);
你真的不能这样做:再次阅读这一行: jList1.add(line, jList1);
What did you really mean?你到底是什么意思? You are adding jList1 to jList1, right?您正在将 jList1 添加到 jList1,对吗? Check the code and fix it accordingly.检查代码并相应地修复它。
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