Question

我正在使用java中的Windows应用程序：

我只是测试了一个在我的系统中登录功能的按钮：

我的按钮操作执行了代码：

private void loginActionPerformed(java.awt.event.ActionEvent evt) {                                      
    if(emp.isSelected()) // get the selected radio button
    {
        Account a = new Account();
        Emp e = new Emp();
        a.setUsername(username.getText().toUpperCase());
        a.setPassword(password.getText().toUpperCase());
        e.login(a);
        this.dispose();
    }

    else if(supp.isSelected())
    {
    }

    else if(admin.isSelected())
    {
        Account a = new Account();
        Admin m = new Admin();
        a.setUsername(username.getText().toUpperCase());
        a.setPassword(password.getText().toUpperCase());
        m.login(a);
        this.dispose();
    }

    else
        JOptionPane.showMessageDialog(null, "Please select a choice", "Alert", JOptionPane.INFORMATION_MESSAGE);
}

功能登录代码：

public class Emp
{

public void login(Account a)
{
    boolean find = false;
    ObjectInputStream in = null;
    try {
        in = new ObjectInputStream(new FileInputStream("C:\\Users\\فاطمة\\Downloads\\employees.bin"));
        ArrayList<Account> b = (ArrayList)in.readObject();
        Iterator<Account> i = b.iterator();
        while(i.hasNext())
        {
            Account ac = i.next();
            if(ac.getUsername().equals(a.getUsername()) && ac.getPassword().equals(a.getPassword()))
            {
                find = true;
            }
            else
                JOptionPane.showMessageDialog(null, "Wrong username or password .. try again !!", "Login Failed",JOptionPane.ERROR_MESSAGE);

        }
        if(find)
        {
            JOptionPane.showMessageDialog(null, "Welcome " + a.getUsername(), "Login Success", JOptionPane.INFORMATION_MESSAGE);
                emp_page e = new emp_page();
                e.setLocation(350, 150);
                e.setSize(400, 490);
                e.setTitle("Products Management");
                e.setVisible(true);
        }
    } catch (FileNotFoundException ex) {
        //Logger.getLogger(Emp.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException | ClassNotFoundException ex) {
        //Logger.getLogger(Emp.class.getName()).log(Level.SEVERE, null, ex);
    } finally {
        try {
            in.close();
        } catch (IOException ex) {
            //Logger.getLogger(Emp.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}
}

帐户类代码：

import java.io.Serializable;

public class Account implements Serializable{

private String username;
private String password;

public String getUsername() {
    return username;
}

public void setUsername(String username) {
    this.username = username;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}
}

我有两个问题：

首先：当我点击按钮登录时...程序终止而不做任何事情。第二：运行我的代码时发生了另一个错误：它抛出错误说：

 java.lang.classnotfoundexception: Account

注意：代码在默认包中运行时运行良好但是当我将它移动到特定包时出现这些问题...我进行重构，一切都很好，但仍然是同样的问题...我尝试创建新项目并再次编写代码，但仍然存在同样的问题。

我很抱歉很长的帖子但请有人告诉我如何解决这个问题？

运行JFrame时java中的classnotfoundexception错误？

0 个答案: