如何在获取'无法解析符号'错误时将键和值添加到Hashmap中 [英] How to add keys and values to a Hashmap while getting 'cannot resolve put symbol' error

问题描述

我正在使用Android Studio 1.4.1，并且刚刚创建了一个Hashmap，并且正在关注如何填充和操作它的教程（在Java上）。
但是，我得到'无法解决符号放置'错误，put命令是红色的。
我添加的图像显示了自动完成快照，虽然导入了java.util.HashMap，但没有自动完成中可用的put命令。可用命令也显示为红色。我试图用它们代替put命令。我一直都有这种类型的问题。谁能帮忙？
预先感谢您...

  import java.util.HashMap; 
 
 HashMap< String，String> pozisyon = new HashMap< String，String>（）; 
 pozisyon.put（SKale，a8）; 
  

解决方案

EDIT1：
方法外部的HashMap字段。这样的事情不会奏效：

  public class Class {
 HashMap< String，String> hashMap = new HashMap< String，String>（）; 
 hashMap.put（one，two）; 
 
 
 
 
 
 $ b 
如果你想达到这个目的，把它放在构造函数中，就像这样： 
  public class Class {
 HashMap< String，String> hashMap = new HashMap< String，String>（）; 
 
 public Class（）{
 hashMap.put（one，two）; 
} 
} 
  
其他方法可以在 static 块。  
I am working with Android Studio 1.4.1 and I had just created a Hashmap and was following a tutorial (on java) on how to populate and manipulate it. 
However I get a 'cannot resolve symbol put' error and the "put" command is in red.
The image I added shows the auto complete snapshot and although java.util.HashMap is imported there is no "put" command that is available in autocomplete. The available commands also are showing in red. I tried to use them instead of the "put" command. I keep having this type of problem all along. Can anyone help?
Thank you in advance...

import java.util.HashMap;

HashMap<String, String> pozisyon = new HashMap<String, String>();
pozisyon.put("SKale", "a8");

解决方案
EDIT1:
You cannot add elements in HashMap fields outside of methods. Things like this wont work:
public class Class {
    HashMap<String, String> hashMap = new HashMap<String, String>();
    hashMap.put("one", "two");
}
If you want to achieve that, put it in the constructors, like so:
public class Class {
    HashMap<String, String> hashMap = new HashMap<String, String>();

    public Class() {
        hashMap.put("one", "two");
    }
}
Other way you can do it is in a static block. 

                        
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