我在阅读我制作的一些文件时遇到了一点问题。我正在制作游戏，并决定为地图制作自己的文件类型。我做了一个特殊的应用程序来制作这些地图文件。实例化地图后，我可以选择调用 readFile(String path) 将地图设置为已保存的地图。我知道我必须以相同的顺序读取和写入流，并且一切都很顺利，直到我添加了关于读取和写入字节 [] [] 的语句。我无法弄清楚为什么会出现此异常以及如何仍然读取字节 [] []。这是我的课。
public class Map implements Serializable{
String savePath;
int boxWidth;
int boxHeight;
int mapWidth;
int mapHeight;
BufferedImage map;
byte[][] encoded;
LinkedList<BufferedImage> tileSet = new LinkedList<BufferedImage>();
Map(int boxWidth, int boxHeight, int mapWidth, int mapHeight){
map = new BufferedImage(boxWidth * mapWidth, boxHeight * mapHeight, BufferedImage.TYPE_INT_RGB);
Graphics g = map.createGraphics();
g.setColor(Color.WHITE);
g.fillRect(0, 0, map.getWidth(), map.getHeight());
g.dispose();
this.boxHeight = boxHeight;
this.boxWidth = boxWidth;
this.mapHeight = mapHeight;
this.mapWidth = mapWidth;
initEncode();
}
Map(){
map = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
this.boxHeight = 0;
this.boxWidth = 0;
this.mapHeight = 0;
this.mapWidth = 0;
initEncode();
}
void initEncode(){
int width = 2 * mapWidth + 1;
int height = 2 * mapHeight + 1;
encoded = new byte[width][height];
for(int i = 0; i < width; i++){
for(int j = 0; j < height; j++){
encoded[i][j] = 0;
}
}
}
void setMapTile(int i, int j, byte index){
encoded[2 * i + 1][2 * j + 1] = index;
}
void setMapWall(int i, int j, byte index){
encoded[2 * i][2 * i] = index;
}
void addToTileset(Tile tile){
tileSet.add(tile.tile);
writeFile(savePath);
}
//writing to file with path - boolean is for whether it went successfully or not
boolean writeFile(String path){
savePath = path;
try{
OutputStream file = new FileOutputStream(path);
OutputStream buffer = new BufferedOutputStream(file);
ObjectOutputStream output = new ObjectOutputStream(buffer);
writeObject(output);
output.close();
buffer.close();
file.close();
}catch(IOException ex){
System.err.println("Could not Write to file: " + path + "\nError caused by: " + ex);
return false;
}
return true;
}
//reading from file with path - boolean is for whether it went successfully or not
boolean readFile(String path){
savePath = path;
try{
InputStream file = new FileInputStream(path);
InputStream buffer = new BufferedInputStream(file);
ObjectInputStream in = new ObjectInputStream(buffer);
readObject(in);
initEncode();
file.close();
buffer.close();
in.close();
}catch(IOException ex){
System.err.println("Could not read from file: " + path + "\nError caused by: " + ex + "\n");
ex.printStackTrace();
return false;
}catch(ClassNotFoundException e){
System.err.println("Could not read from file: " + path + "\nError caused by: " + e + "\n");
e.printStackTrace();
}
return true;
}
private void writeObject(ObjectOutputStream out) throws IOException {
out.writeInt(boxHeight);
out.writeInt(boxWidth);
out.writeInt(mapHeight);
out.writeInt(mapWidth);
ImageIO.write(map, "png", out);
out.writeObject(encoded);
out.writeInt(tileSet.size());
for(BufferedImage b: tileSet){
ImageIO.write(b, "png", out);
}
}
public void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException{
boxHeight = in.readInt();
boxWidth = in.readInt();
mapHeight = in.readInt();
mapWidth = in.readInt();
map = ImageIO.read(in);
encoded = (byte[][]) in.readObject();
int tileSetSize = in.readInt();
for(int i = 0; i < tileSetSize; i++){
tileSet.add(ImageIO.read(in));
}
}
}
我的 (byte[][]) readObject() 行抛出 OptionalDataException 是否有某种原因，我如何仍然读/写我的 byte[][]。
编辑：感谢您的回答 Abhinav Kumar。我忽略了这一点，但是当我修复代码时，它仍然在同一行给我同样的错误。（课程现已修复）。