我一直在为我的一些朋友制作一个安装程序，用于向 Minecraft 添加模组。
我创建了一个名为 fileChooserCheck 的方法（在 FileHandling 类中）。它的作用是获取用户通过 JFileChooser 定义的安装目录并将其设置为 modDir，或者，如果用户未指定，则将安装目录设置为默认目录，即 File 'defaultDir' . 每当我运行方法 fileChooserCheck 时，它都不会更改 Path modDir，当我尝试调用它（modDir）时，它会返回 null。
我怎样才能使 fileChooserCheck 实际更改 Path modDir？另外，为什么我的安装失败了？（我刚刚完全删除了 modDir 并手动设置了路径，它仍然失败）
如果你在我的代码中看到任何你马虎和/或可以/需要改进的地方，请告诉我，我只用 Swing 编程了几天，而用 Java 编程了将近一周[我只知道另一种编程语言[这是非常基本的）]
主班
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URL;
import java.nio.file.Path;
import javax.swing.*;
public class MainInstaller extends JFrame {
private final long serialVersionUID = 1L;
String moddir;
Path modDir;
URI bioForums = URI.create("http://bio-mc.com/forum");
URI thread = URI.create("http://google.com");
String username = System.getProperty("user.name");
String mcDir = "C://Users//" + username + "//AppData//Roaming//.minecraft";
File defaultDir = new File("C://Users//" + username + "//AppData//Roaming//.minecraft");
Font consoleFont = new Font("", Font.PLAIN, 13 + 1/2);
Font checkFont = new Font("", Font.PLAIN, 14 + 1/2);
String[] minimapsArray = { "REI's Minimap", "Zan's Minimap" }; //An array of optifine versions, get manually later
Object minimap;
int yInterval = 22;
boolean enabled = false;
boolean optifine, invtweaks, armorhud, statuseffecthud, tabbychat, spc, chatbubbles, map = true;
boolean fcLaunched = false;
JPanel installPanel, modsPanel, consolePanel;
Box box, box1;
JLabel title;
JLabel modsel;
JLabel author;
JTabbedPane tabbedpane = new JTabbedPane();
JComboBox<?> minimaps; //The drop down menus to select the versions of optifine and invtweaks
JButton installButton;
JButton fileButton, forumButton, threadButton;
JTextArea console;
JTextField mcdir;
JFileChooser fc;
public MainInstaller() { //MainInstaller Constructor
super("BlackCrew ModPack Installer"); //Sets the title of the frame
//Defines the title a bit more and adds it to the box
box = Box.createVerticalBox();
title = new JLabel("BlackCrew Modpack");
title.setFont(new Font("Impact", Font.PLAIN, 38 + 1/2));
title.setAlignmentX(CENTER_ALIGNMENT);
box.add(title);
//The First Tab(Installer)
installPanel = new JPanel();
installPanel.setLayout(null);
Insets insets = installPanel.getInsets();
installButton = new JButton("Install!");
installButton.setFont(new Font("", Font.PLAIN, 20));
Dimension size = installButton.getPreferredSize();
mcdir = new JTextField();
mcdir.setText("C:/Users/" + username + "/AppData/Roaming/.minecraft");
mcdir.setFont(new Font("", Font.PLAIN, 13));
size = mcdir.getPreferredSize();
mcdir.setBounds(139 + insets.left, 80 + insets.top, size.width + 5, size.height);
mcdir.setEditable(false);
fileButton = new JButton("...");
size = fileButton.getPreferredSize();
fileButton.setBounds(mcdir.getX() + 280, mcdir.getY() - 1 + insets.top, size.width, size.height + 3);
fileButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
fcLaunched = true;
//Create the FileChooser and define it a bit
if (fc == null) {
fc = new JFileChooser("C://Users//" + username + "//AppData//Roaming//.minecraft");
fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
}
//Show the file Chooser
int returnVal = fc.showOpenDialog(fileButton);
fc.setSelectedFile(defaultDir);
//modDir = moddir.toPath();
//Process the results
if(returnVal == JFileChooser.APPROVE_OPTION) {
mcdir.setText(fc.getSelectedFile().getPath());
}
}
});
forumButton = new JButton("<html><font color=green>BioCraft</font> <font color=black>Forums</font></html>");
forumButton.setFont(new Font("", Font.PLAIN, 13));
size = forumButton.getPreferredSize();
forumButton.setBounds(1 - 1/2 + insets.left, 10 + insets.top, size.width, size.height);
forumButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
Desktop.getDesktop().browse(bioForums);
} catch (IOException e1) {
e1.printStackTrace();
System.out.println("Failed to Launch the BioCraft Forums");
}
}
});
threadButton = new JButton("<html><font color=blue>Installer</font> <font color=black>Thread</font></html>");
threadButton.setFont(new Font("", Font.PLAIN, 13));
size = threadButton.getPreferredSize();
threadButton.setBounds(459 + insets.left, forumButton.getY() + insets.top, size.width, size.height);
threadButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
try {
Desktop.getDesktop().browse(thread);
} catch (IOException e) {
e.printStackTrace();
System.out.println("Failed to Launch the Installer Thread");
}
}
});
author = new JLabel("<html><font color=black>Developed by</font> <font color=red>n1ghtk1n9</font></html>");
author.setFont(new Font("", Font.PLAIN, 13));
author.setForeground(Color.RED);
author.setBounds(235 + insets.left, 1 + insets.top, size.width + 20, size.height);
installButton.setBounds(139 + insets.left, mcdir.getY() + 50 + insets.top, mcdir.getWidth() + fileButton.getWidth(), size.height + 40);
installPanel.add(author);
installPanel.add(forumButton);
installPanel.add(threadButton);
installPanel.add(installButton);
installPanel.add(mcdir);
installPanel.add(fileButton);
//The Second Tab(Mod Selection)
modsPanel = new JPanel();
modsPanel.setLayout(null);
insets = modsPanel.getInsets();
JLabel modsel = new JLabel("Select the mods you installed");
modsel.setFont(new Font("", Font.BOLD, 15));
size = modsel.getPreferredSize();
modsel.setBounds(5 + insets.left, 2 + insets.top, size.width + 15, size.height);
//Adds all the mod checkboxes
JCheckBox optiBox = new JCheckBox("Optifine");
optiBox.setFont(checkFont);
size = optiBox.getPreferredSize();
optiBox.setBounds(2 + 1/2 + insets.left, 2 + yInterval + insets.top, size.width, size.height); //Y = 23
optiBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
optifine = !optifine;
}
});
JCheckBox invBox = new JCheckBox("InvTweaks");
invBox.setFont(checkFont);
size = invBox.getPreferredSize();
invBox.setBounds(2 + 1/2 + insets.left, 2 + (yInterval*2) + 1/2 + insets.top, size.width, size.height); //Y = 44
invBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
invtweaks = !invtweaks;
}
});
JCheckBox armorhudBox = new JCheckBox("Armor HUD"); //Also automatically installs bspkrs-core
armorhudBox.setFont(checkFont);
size = armorhudBox.getPreferredSize();
armorhudBox.setBounds(2 + 1/2 + insets.left, 2 + (yInterval*3) + insets.top, size.width, size.height); //Y = 65
armorhudBox.setToolTipText("Also installs 'bskprs core'");
armorhudBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
armorhud = !armorhud;
}
});
JCheckBox statusBox = new JCheckBox("Status Effect HUD"); //Also automatically installs bspkrs-core
statusBox.setFont(checkFont);
size = statusBox.getPreferredSize();
statusBox.setBounds(2 + 1/2 + insets.left, 2 + (yInterval*4) + insets.top, size.width, size.height); //Y = 86
statusBox.setToolTipText("Also installs 'bskprs core'");
statusBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
statuseffecthud = !statuseffecthud;
}
});
JCheckBox tabbyBox = new JCheckBox("TabbyChat");
tabbyBox.setFont(checkFont);
size = tabbyBox.getPreferredSize();
tabbyBox.setBounds(2 + 1/2 + insets.left, 2 + (yInterval*5) + insets.top, size.width, size.height); //Y = 108
tabbyBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
tabbychat = !tabbychat;
}
});
JCheckBox spcBox = new JCheckBox("SinglePlayerCommands");
spcBox.setFont(checkFont);
size = spcBox.getPreferredSize();
spcBox.setBounds(2 + 1/2 + insets.left, 2 + (yInterval*6) + insets.top, size.width, size.height);
spcBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
spc = !spc;
}
});
JCheckBox mapBox = new JCheckBox("MiniMap");
mapBox.setFont(checkFont);
size = mapBox.getPreferredSize();
mapBox.setBounds(2 + 1/2 + insets.left, 2 + (yInterval*7) + insets.top, size.width, size.height);
//map = mapBox.isSelected();
mapBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
enabled = !enabled;
minimaps.setEnabled(enabled);
map = !map;
}
});
JCheckBox bubbleBox = new JCheckBox("Chat Bubbles");
bubbleBox.setFont(checkFont);
size = bubbleBox.getPreferredSize();
bubbleBox.setBounds(2 + 1/2 + insets.left, 2 + (yInterval*8) + insets.top, size.width, size.height);
bubbleBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
chatbubbles = !chatbubbles;
}
});
minimaps = new JComboBox<Object>(minimapsArray);
minimaps.setFont(checkFont);
size = minimaps.getPreferredSize();
minimaps.setBounds(83 + insets.left, 7 - 31/32 - 1/32 + (yInterval*7) + insets.top, size.width, size.height - 6 - 1/2);
minimaps.setEnabled(false);
minimap = minimaps.getSelectedItem();
//The Third Tab(Console)
consolePanel = new JPanel();
consolePanel.setLayout(null);
console = new JTextArea("Launched the BlackCrew ModPack Installer!", 600, 400);
console.setFont(new Font("", Font.PLAIN, 13 + 1/2));
console.setBounds(0, 0, 600, 400);
console.setEditable(false);
console.setWrapStyleWord(true);
console.setLineWrap(true);
consolePanel.add(console);
console.setCaretPosition(console.getDocument().getLength());
modsPanel.add(modsel);
modsPanel.add(optiBox);
modsPanel.add(invBox);
modsPanel.add(armorhudBox);
modsPanel.add(statusBox);
modsPanel.add(tabbyBox);
modsPanel.add(mapBox);
modsPanel.add(spcBox);
modsPanel.add(bubbleBox);
modsPanel.add(minimaps);
tabbedpane.addTab("Installer", installPanel);
tabbedpane.addTab("Mod Selection", modsPanel);
tabbedpane.addTab("Console", consolePanel);
//Add everything to the frame
add(box, BorderLayout.NORTH);
add(tabbedpane);
}
public static void main(String[] args) throws IOException { //Main Method
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch(UnsupportedLookAndFeelException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
final MainInstaller frame = new MainInstaller();
Insets insets = frame.getInsets();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.setSize(600, 400);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setResizable(false);
final FileHandling file = new FileHandling();
file.createBaseFolder();
frame.installButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(frame.optifine == false && frame.invtweaks == false && frame.armorhud == false && frame.chatbubbles == false && frame.spc == false && frame.statuseffecthud == false) {
JOptionPane.showMessageDialog(frame, "No mods are enabled");
} else {
// (?) Install mods here?
try {
file.copyMods();
System.out.println("Installing Mods");
System.out.println("Source: " + file.invSource);
System.out.println("Target:" + file.invTarget);
} catch (IOException e1) {
e1.printStackTrace();
System.out.println("Error!" + e);
}
}
}});
}
}
文件处理类
import javax.swing.*;
import java.awt.*;
import java.io.*;
import java.nio.file.*;
import java.nio.file.StandardCopyOption.*;
public class FileHandling {
MainInstaller mi = new MainInstaller();
Path modDir = mi.modDir;
Path source = Paths.get("C://Users//Gannon//Desktop//Java//workspace//ModPack Installer//test.txt");
Path target = Paths.get("C://Users");
Path invSource = Paths.get("mods//invtweaks.jar");
Path invTarget = Paths.get(mi.modDir + "//InventoryTweaks-MC1.6.2-1.55-b56.jar");
public void createBaseFolder() {
try {
System.out.println(mi.moddir);
} catch(Exception e) {
System.out.println("Folder Creation Failed!"); // (?)Remove and replace with in-program error
}
}
public void fileChooserCheck() {
if(mi.fcLaunched == false) {
mi.modDir = mi.defaultDir.toPath();
System.out.println("Unchanged: " + mi.modDir);
} else if(mi.fcLaunched == true) {
mi.modDir = mi.fc.getSelectedFile().toPath();
System.out.println("Changed: " + mi.modDir);
}
}
public void copyMods() throws IOException {
fileChooserCheck();
try {
if(mi.invtweaks == true) {
Files.copy(invSource, invTarget);
System.out.println("Trying to copy!");
}
} catch (IOException e) {
System.out.println("The Copying Failed!" + e);
}
}
}