基于Json文件的Java非重复数组

Question

目前，我还是一名大学生，正在为这个实验室项目苦苦挣扎。事实上，我完成了这个实验，但我想挑战一下自己，在我的项目中做一些额外的事情。我有这样的 JSON 文件:

{
"human":
[
{"name":"Richard",
"age":"16",
"job":"student",
"height":"160cm"
},
{"name":"Cindy",
"age":"17",
"job":"student",
"height":"150cm"
},
{"name":"Yuan",
"age":"20",
"job":"teacher",
"height":"180cm"
},
{"name":"Kathy",
"age":"18",
"job":"student",
"height":"175cm"
},
{"name":"Lee",
"age":"23",
"job":"teacher",
"height":"165cm"
},

在我的 XML 代码中，我的布局如下:

Spinner job
Spinner name
Textview txtview
Textview dispInfo

这就是我试图让我的微调器只做老师和学生的工作的方法，但是，它不起作用...

    JSONObject myJSON_object = new JSONObject(myText);

    //the main JSON object is/includes an array
    //extract that array
    final JSONArray myJSON_array = myJSON_object.getJSONArray("human");

    //temporarily array for Nettle Spinner
    String[] temp = new String[myJSON_array.length()];
    for (int i=0; i < myJSON_array.length(); i++){
        try{
            //get an individual element of the JSON array
            JSONObject aJSON_element = myJSON_array.getJSONObject(i);
            //get the individual properties of the JSON element
            String jsJob = aJSON_element.getString("job");
            temp[i] = jsJob;

        }
        catch (JSONException e)
        {
            Toast.makeText(getBaseContext(), "Dude, you have to know what the JSON looks like to parse it", Toast.LENGTH_SHORT).show();
            e.printStackTrace();
        }
    }

    //actually how the array gonna be in
    String[] forJob = null;
    for (int i=0; i < temp.length; i++){
        boolean duplicate = false;
        int b = 0;
        while (b < i){
            if (temp[i] == temp[b]) {
                duplicate = true;
                b++;
            }
        }
        if (duplicate == false) {
            forNettle[i] = temp[i];
        }
    }

    //associate the full name with the listView
    Spinner spJob = (Spinner) findViewById(R.id.spNettle);
    Spinner spName = (Spinner) findViewById(R.id.spCate);


    ArrayAdapter<String> arrJob = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, forJob);
    arrJob.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
    spJob.setAdapter(arrJob);

Answer 1

去除重复项的方法:

int lastIdx = 0;
String[] result = new String[temp.lenght];
mainLoop: for(int i =0; i < temp.length; i++) {
   for(int j = 0; j < lastIdx; j++)
      if(result[j].equals(temp[i])) continue mainLoop;
   result[lastIdx++] = temp[i];
}

那么你的unique list就是从0到lastIdx的数组结果位置(其余的用null填充；