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，然后将其复制到 HashMap.

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，我只是用属性文件初始化HashMap，但现在我已经定义了HashMap，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.

较早的方法:

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
}
}

如何在此处将属性对象分配给 HashMap?

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

推荐答案

如果我理解正确的话，属性中的每个值都是一个代表整数的字符串.所以代码看起来像这样:

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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