为什么NetBeans 8.1会在编辑器中运行项目，但是当我将其编译到jar中时，我会收到错误

Question

我正在使用NetBeans在Java中制作游戏，当我在NetBeans中运行它时，我得到一个图像显示，因为这是预期的行为。但是当我将项目编译成jar文件并运行它时，如果在终端中运行，我会得到一个白屏和堆栈跟踪。这是jar的堆栈跟踪。我真的不知道该怎么办，因为我一直在寻找答案，但一直没有找到任何东西。这些都是文件的URL，它们都是正确的

java.io.FileNotFoundException: res\Worlds\world1.world (The system cannot find the path specified)
        at java.io.FileInputStream.open0(Native Method)
        at java.io.FileInputStream.open(Unknown Source)
        at java.io.FileInputStream.<init>(Unknown Source)
        at java.io.FileInputStream.<init>(Unknown Source)
        at java.io.FileReader.<init>(Unknown Source)
        at dev.DualKeys.SIF.utils.Utils.loadFileAsString(Utils.java:13)
        at dev.DualKeys.SIF.worlds.World.loadWorld(World.java:47)
        at dev.DualKeys.SIF.worlds.World.<init>(World.java:18)
        at dev.DualKeys.SIF.states.GameState.<init>(GameState.java:24)
        at dev.DualKeys.SIF.Game.init(Game.java:56)
        at dev.DualKeys.SIF.Game.run(Game.java:86)
        at java.lang.Thread.run(Unknown Source)
java.lang.NumberFormatException: For input string: ""
        at java.lang.NumberFormatException.forInputString(Unknown Source)
        at java.lang.Integer.parseInt(Unknown Source)
        at java.lang.Integer.parseInt(Unknown Source)
        at dev.DualKeys.SIF.utils.Utils.parseInt(Utils.java:29)
        at dev.DualKeys.SIF.worlds.World.loadWorld(World.java:49)
        at dev.DualKeys.SIF.worlds.World.<init>(World.java:18)
        at dev.DualKeys.SIF.states.GameState.<init>(GameState.java:24)
        at dev.DualKeys.SIF.Game.init(Game.java:56)
        at dev.DualKeys.SIF.Game.run(Game.java:86)
        at java.lang.Thread.run(Unknown Source)
Exception in thread "Thread-0" java.lang.ArrayIndexOutOfBoundsException: 1
        at dev.DualKeys.SIF.worlds.World.loadWorld(World.java:50)
        at dev.DualKeys.SIF.worlds.World.<init>(World.java:18)
        at dev.DualKeys.SIF.states.GameState.<init>(GameState.java:24)
        at dev.DualKeys.SIF.Game.init(Game.java:56)
        at dev.DualKeys.SIF.Game.run(Game.java:86)
        at java.lang.Thread.run(Unknown Source)

这是来自dev.DualKeys.SIF.utils.Utils的loadFileAsString

public static String loadFileAsString(String path) {
        StringBuilder builder = new StringBuilder();

        try {
            BufferedReader br = new BufferedReader(new FileReader(path));
            String line;
            while ((line = br.readLine()) != null) {
                builder.append(line + "\n");
            }

            br.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return builder.toString();
    }

和dev.DualKeys.SIF.worlds.World的loadWorld

private void loadWorld(String path) {
        String file = Utils.loadFileAsString(path);
        String[] tokens = file.split("\\s+");
        width = Utils.parseInt(tokens[0]);
        height = Utils.parseInt(tokens[1]);

        tiles = new int[width][height];
        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                tiles[x][y] = Utils.parseInt(tokens[(x + y * width) + 2]);
            }
        }
    }

Answer 1

我假设最后两个例外是第一个例子的结果：程序找不到文件res\Worlds\world1.world。由于程序使用的是FileInputStream，因此无法在jar中包含该文件。