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java - 用户验证密码后如何启动java小程序?

转载 作者:行者123 更新时间:2023-11-30 05:39:34 25 4
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我正在尝试连接两个简单的java程序,一个密码登录程序,然后打开第二个程序(一个非常简单的PrintWriter程序)。

我是个 super 菜鸟,所以尝试将辅助程序添加到密码程序中。显然这不起作用。我看到很多关于创建密码程序的条目,以及一些关于使用 .exec 运行外部应用程序的条目。我想我想做的是嵌入一个在用户登录后运行的程序。

 import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class PasswordApplet extends Applet implements ActionListener
{
//Declaring variables
String id, password;
String[] validID = { "id1", "id2"};
String[] validPassword = { "password1", "password2"};
boolean success;

//Create components for applet
Label headerLabel = new Label("Please type your ID and Password");
Label idLabel = new Label("ID: ");
TextField idField = new TextField(8);
Label passwordLabel = new Label("Password: ");
TextField passwordField = new TextField(8);
Button loginButton = new Button("Login");

public void init()
{
//set color, layout, and add components
setBackground(Color.orange);
setLayout(new FlowLayout(FlowLayout.LEFT, 50, 30));
add(headerLabel);
add(idLabel);
add(idField);
idField.requestFocus();
add(passwordLabel);
add(passwordField);
passwordField.setEchoChar('*');
add(loginButton);
loginButton.addActionListener(this);
}

public void actionPerformed(ActionEvent e)
{
success = false;
//Sequential search
int i = 0;
while ( i<validID.length)
{
if(idField.getText().compareTo(validID[i]) == 0)
{
if (passwordField.getText().compareTo(validPassword[i]) == 0)
{
success = true;
}
}
i = i + 1;
}
if (success == true)
{
headerLabel.setText("Login successful");
}

else
{
headerLabel.setText("Unsuccessful. Try Again");
idField.setText(" ");
passwordField.setText(" ");
idField.requestFocus();
}

repaint();
}
}

这是第二个 PrintWriter 程序:

 import java.io.*;

public class Philosophers
{
public static void main(String[] args) throws IOException
{
//Declare a PrintWriter variable named myFile and open a file
named philosophers.rtf.
PrintWriter myFile = new PrintWriter("philosophers.rtf");

//Write the names of 3 philosophers to the file
myFile.println("John Locke");
myFile.println("David Hume");
myFile.println("Edmund Burke");

//Close the file
myFile.close();
}
}

最佳答案

您可以简单地在成功案例中的 try/catch block 中添加 Philosophers.main 调用,因为 Philosophers.main 可能会抛出 IOException,例如:

if (success == true) {
headerLabel.setText("Login successful");
try {
Philosophers.main(null);
} catch (IOException ex){ex.printStackTrace();}

关于java - 用户验证密码后如何启动java小程序?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55922605/

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