我和我的搭档一直在做一个项目的不同部分，现在我们想把它们放在一起，但我们遇到了麻烦。他为 jOptionpane 编写了他的部分代码，但完成的项目将使用 jFrame。
代码的这个特定部分可以编译，但它不会向文件中写入任何内容，它在 jOptionpane 版本中工作。基本上我们想从文本字段中读取并将它们写入 .txt 文件。我知道在使用基于 unix 的操作系统时可能会有细微的差别，但我们在 Windows 上也没有成功。我试图模仿这个网站的其他答案，但我没有任何运气。有什么提示或建议吗？
public void jTextField1ActionPerformed (java.awt.event.ActionEvent te)
{
String user,usersPass;
FileWriter fw;
FileReader fr;
BufferedWriter writer;
BufferedReader reader;
if (te.getSource() == jTextField1)
{
user = jTextField1.getText();
}
else if (te.getSource() == jTextField2)
{
usersPass = jTextField2.getText();
}
try
{
ArrayList<String> nameList = new ArrayList<String>(100);
ArrayList<String> passwords = new ArrayList<String>(100);
File userNames = new File("Username.txt");
Scanner users = new Scanner(userNames);
File userPass = new File("Passwords.txt");
Scanner pass = new Scanner(userPass);
// FileWriter fw;
// FileReader fr;
fw = new FileWriter("Macintosh Hd/Users/smooth4prez/Desktop/Project/Username.txt");
fr = new FileReader("Macintosh Hd/Users/smooth4prez/Desktop/Project/Passwords.txt");
writer = new BufferedWriter(fw);
reader = new BufferedReader(fr);
}
catch(FileNotFoundException E)
{
E.printStackTrace();
}
catch(IOException e)
{
e.printStackTrace();
}
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt)
{
if (evt.getSource() == jButton1)
{
dispose ();
new SignIn().setVisible(true);
}
}
这是我们正在尝试重做的 jOptionpane 版本。
import java.util.ArrayList;
import java.util.Scanner;
import javax.swing.JOptionPane;
import java.io.*;
public class LoginTest implements Serializable
{
Scanner keyboard = new Scanner(System.in);
public static void main(String[] args)throws FileNotFoundException, IOException, NotSerializableException
{
Username();
}
public static void Username()throws FileNotFoundException, IOException
{
File userNames = new File("Username.txt");
Scanner users = new Scanner(userNames);
File userPass = new File("Passwords.txt");
Scanner pass = new Scanner(userPass);
FileWriter fWriteUser = new FileWriter("Username.txt", true);
PrintWriter outUser = new PrintWriter(fWriteUser);
FileWriter fWritePass = new FileWriter("Passwords.txt", true);
PrintWriter outPass = new PrintWriter(fWritePass);
ArrayList<String> nameList = new ArrayList<String>(100);
ArrayList<String> passwords = new ArrayList<String>(100);
int userCount = 0;
while(users.hasNext())
{
String oldName = users.nextLine();
nameList.add(oldName);
userCount = userCount + 1;
}
while(pass.hasNext())
{
String oldPass = pass.nextLine();
passwords.add(oldPass);
}
String strNumUsers = "";
strNumUsers = JOptionPane.showInputDialog("How many users would you like to register?");
int numUsers = Integer.parseInt(strNumUsers);
int newCount = userCount + 1;
for(int j = 0;j < numUsers;j++)
{
String username = JOptionPane.showInputDialog("Enter the username");
for(int i = 0;i < nameList.size();i++)
{
if(username.equals(nameList.get(i)))
{
JOptionPane.showMessageDialog(null, "That username is already taken");
username = JOptionPane.showInputDialog("Enter the username");
i = 0;
}
}
nameList.add(username);
String password = JOptionPane.showInputDialog("Enter password");
passwords.add(password);
File dir = new File("Inbox" + newCount);
dir.mkdir();
File folder = new File("Inbox" + newCount);
File m;
m = new File("Macintosh Hd/Users/smooth4prez/Desktop/Project3/Inbox" + newCount + "/messages.txt");
m.createNewFile();
File n;
n = new File("Macintosh Hd/Users/smooth4prez/Desktop/Project3/Inbox" + newCount + "/outbox.txt");
n.createNewFile();
newCount = newCount + 1;
}
for(int k = userCount;k < nameList.size();k++)
{
outUser.println(nameList.get(k));
outPass.println(passwords.get(k));
}
outUser.close();
outPass.close();
String signInUserName = JOptionPane.showInputDialog("Enter username to sign in");
for(int i = 0;i < nameList.size();i++)
{
if(signInUserName.equals(nameList.get(i)))
{
String signInPassword = JOptionPane.showInputDialog("Please enter your password");
if(signInPassword.equals(passwords.get(i)))
{
String response = "";
JOptionPane.showMessageDialog(null, "Signed in!");
i = nameList.size();
response = JOptionPane.showInputDialog("Would you like to send a message, view messages, or exit?" +
"(Please enter send, view, or exit.)");
/*switch(response.trim())
{
case "Send":
case "send":
Messages.MessageTest(nameList, signInUserName);
break;
case "View":
case "view":
Messages.MessageView(nameList, signInUserName);
break;
case "Exit":
case "exit":
break;
case "":
JOptionPane.showMessageDialog(null, "You didn't enter anything, DIPSHIT!");
break;
default:
JOptionPane.showMessageDialog(null, "That is not a proper response.");
break;
}*/
/*
Save s = new Save();
testObject Rob = new testObject();
s.saveMyObject("myfile", Rob);
//Saving an object with class Save.java
/*
Save s = new Save();
Object myObject = new Object();
String test = "test";
myObject = (Object)test;
s.saveMyObject("myfile", myObject);
*/
//insert program to search for specific user homepage file
//if found, load that homepage, if not found, call method to create homepage
//and save it as a file with the title including the username
}
else
{
JOptionPane.showMessageDialog(null, "Incorrect password");
i = nameList.size();
}
}
else if(!signInUserName.equals(nameList.get(i)))
{
if(i + 1 == nameList.size())
{
JOptionPane.showMessageDialog(null, "That is not a valid username");
}
}
}
}
}