如何制作简单的字典J2ME

发布于 2024-09-05 02:29:07 字数 670 浏览 1 评论 0原文

我是 JavaME 初学者。我想做一个简单的字典。源数据放置在“res”目录中的“data.txt”文件中。结构是这样的：

#apple=水果种类；
#菠菜=一种蔬菜；

流程就这么简单。用户在文本字段中输入要搜索的单词，例如“apple”，系统接受用户输入，读取“data.txt”，在其中搜索匹配的单词，取出相应的单词，并将其显示到另一个文本字段/文本框。

我已经设法使用此代码读取整个“data.txt”..

private String readDataText() {
    InputStream is = getClass().getResourceAsStream("data.txt");
    try {
        StringBuffer sb = new StringBuffer();
        int chr, i=0;
        while ((chr = is.read()) != -1)
            sb.append((char) chr);
        return sb.toString();
    }
    catch (Exception e) {
    }
    return null;
}

但我仍然不知道如何拆分它，找到与用户输入匹配的单词并获取相应的单词。希望有人愿意分享他/她的知识来帮助我..

原文

I am beginner in JavaME. I'd like to make simple dicitionary. The source data is placed on "data.txt" file in "res" directory. The structure is like this:

#apple=kind of fruit;
#spinach=kind of vegetable;

The flow is so simple. User enters word that he want to search in a text field, e.g "apple", system take the user input, read the "data.txt", search the matched word in it, take corresponding word, and display it to another textfield/textbox.

I've managed to read whole "data.txt" using this code..

private String readDataText() {
    InputStream is = getClass().getResourceAsStream("data.txt");
    try {
        StringBuffer sb = new StringBuffer();
        int chr, i=0;
        while ((chr = is.read()) != -1)
            sb.append((char) chr);
        return sb.toString();
    }
    catch (Exception e) {
    }
    return null;
}

but I still dont know how to split it, find the matched word with the user input and take corresponding word. Hope somebody willing to share his/her knowledge to help me..

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生死何惧 2024-09-12 02:29:07

基本上你想要这样的东西：

private String readDataText() {
    InputStream is = getClass().getResourceAsStream("data.txt");
    BufferedReader br = new BufferedReader(new InputStreamReader(is));
    String line;
    try {
        while ((line = br.readLine()) != null)
        {
            String[] split = line.split("=");
            if (split[0].equals("#someFruit"))
                return split[1];
        }
    }
    catch (Exception e) {}
    return null;
}

使用 BufferedReader 读取行，不需要处理单个 char 。
用 = 标记分割行
检查字典中的键是否是所需的键，如果是，则返回值。

Basically you want something like this:

private String readDataText() {
    InputStream is = getClass().getResourceAsStream("data.txt");
    BufferedReader br = new BufferedReader(new InputStreamReader(is));
    String line;
    try {
        while ((line = br.readLine()) != null)
        {
            String[] split = line.split("=");
            if (split[0].equals("#someFruit"))
                return split[1];
        }
    }
    catch (Exception e) {}
    return null;
}