使用属性文件中的条目填充HashMap [英] Populating a HashMap with entries from a properties file

问题描述

我想使用 Properties 类填充 HashMap 。我想加载 .propeties 文件中的条目，然后将它复制到 HashMap 中。

I want to populate a HashMap using the Properties class. I want to load the entries in the .propeties file and then copy it into the HashMap.

之前，我用属性文件初始化 HashMap ，但现在我已经定义了 HashMap 并且只想在构造函数中初始化它。

Earlier, I used to just initialize the HashMap with the properties file, but now I have already defined the HashMap and want to initialize it in the constructor only.

前面的方法：

Earlier approach:

Properties properties = new Properties();
try {
properties.load(ClassName.class.getResourceAsStream("resume.properties"));
}
catch (Exception e) { 
}
HashMap<String, String> mymap= new HashMap<String, String>((Map) properties);

但现在，我有这个

public class ClassName {
HashMap<String,Integer> mymap = new HashMap<String, Integer>();

public ClassName(){

    Properties properties = new Properties();
    try {
      properties.load(ClassName.class.getResourceAsStream("resume.properties"));
    }
    catch (Exception e) {

    }
    mymap = properties;
    //The above line gives error
}
}

如何在这里将属性对象分配给 HashMap ？

How do I assign the properties object to a HashMap here ?

推荐答案

如果我理解正确，属性中的每个值都是表示Integer的String。所以代码如下所示：

If I understand correctly, each value in the properties is a String which represents an Integer. So the code would look like this:

for (String key : properties.stringPropertyNames()) {
    String value = properties.getProperty(key);
    mymap.put(key, Integer.valueOf(value));
}

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