java - Java：只要我清空 ArrayList 从中获取其内容的文本文件，我的 ArrayList 就会自行清空

问题描述

我正在用 java 编写自己的库，您可以在其中非常简单地保存变量。但是我在更改变量的值时遇到了问题。一旦 txt 文件为空，ArrayList 就会自行清空。我的代码：

    public class SaveGameWriter {
    private File file;
    private boolean closed = false;
    public void write(SaveGameFile savegamefile, String variableName, String variableValue, SaveGameReader reader) throws FileNotFoundException
    {
        if(!reader.read(savegamefile).contains(variableName))
        {
        file = savegamefile.getFile();
        OutputStream stream = new FileOutputStream(file, true);
        try {
            String text = variableName+"="+variableValue;
            stream.write(text.getBytes());
            String lineSeparator = System.getProperty("line.separator");
            stream.write(lineSeparator.getBytes());
        }catch(IOException e)
        {}
        do {
            try {
                stream.close();
                closed = true;
            } catch (Exception e) {
                closed = false;
            }
        } while (!closed);
        }
    }

    public void setValueOf(SaveGameFile savegamefile, String variableName, String Value, SaveGameReader reader) throws IOException
    {
        ArrayList<String> list = reader.read(savegamefile);
        if(list.contains(variableName))
        {
            list.set(list.indexOf(variableName), Value);
            savegamefile.clear();
            for(int i = 0; i<list.size()-1;i+=2)
            {
                write(savegamefile,list.get(i),list.get(i+1),reader);
            }
        }
    }
}

这是我的 SaveGameReader 类：

    public class SaveGameReader {
    private File file;
    private ArrayList<String> result = new ArrayList<>();
    public String getValueOf(SaveGameFile savegamefile, String variableName)
    {
        ArrayList<String> list = read(savegamefile);
        if(list.contains(variableName))
        {
            return list.get(list.indexOf(variableName)+1);
        }else
            return null;
    }
    public ArrayList<String> read(SaveGameFile savegamefile) {
        result.clear();
        file = savegamefile.getFile();
        BufferedReader in = null;
        try {
            in = new BufferedReader(new FileReader(file));
            String read = null;
            while ((read = in.readLine()) != null) {

                String[] splited = read.split("=");
                for (String part : splited) {
                    result.add(part);
                }
            }
        } catch (IOException e) {
        } finally {
            boolean closed = false;
            while(!closed)
            {
            try {
                in.close();
                closed=true;
            } catch (Exception e) {
                closed=false;
            }
            }
        }
        result.remove("");
        return result;
    }
}

还有我的 SaveGameFile 类：

    public class SaveGameFile {
    private File file;
    public void create(String destination, String filename) throws IOException {
        file = new File(destination+"/"+filename+".savegame");
        if(!file.exists())
        {
            file.createNewFile();
        }
    }
    public File getFile() {
        return file;
    }
    public void clear() throws IOException
    {
        PrintWriter pw = new PrintWriter(file.getPath());
        pw.close();
    }

}

所以，当我调用方法时setValueOf()，ArrayList 是空的，并且在 txt 文件中只有第一个变量 + 值。Hier 的我的数据结构：

Name=Testperson
Age=40
Phone=1234
Money=1000

我的代码有什么问题？

标签： javaarraylist

java - Java：只要我清空 ArrayList 从中获取其内容的文本文件，我的 ArrayList 就会自行清空

问题描述

解决方案

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