我正在嘗試連接兩個簡單的java程序，一個密碼登錄程序，然后打開第二個程序(一個非常簡單的PrintWriter程序)。

我是一個大型菜鳥，所以嘗試將二級程序添加到密碼程序中。顯然這沒用。我看到很多關于創建密碼程序的條目，以及一些關于使用.exec來運行外部應用程序的條目。我想我要做的是嵌入一個在用戶登錄后運行的程序。

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

{

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();

}

}

這是第二個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();

}

}

總結

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