map,arrayList,jsonobject

 

package

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.amazonaws.util.json.JSONObject;

ArrayList is an array, the corresponding format is [];

Map is a key, value pair, the corresponding format is {key=value}

jsonobject is also a key, value pair, and the corresponding format is {key:value}

Example 1 : There are Map key-value pairs in the ArrayList array. The example code is as follows

@Test
	public void testUpsert() {
	    ArrayList<String> arrayList = new ArrayList<String>();
        JSONObject jsonObject=new JSONObject();
        ArrayList<String> arrayListNew = new ArrayList<String>();
        Map<String, String> map=new HashMap<String, String>();
        arrayList.add("The King of Heaven and Earth Tiger");
        arrayList.add("Pagoda Town River Demon");
        arrayList.add("pheasant boring");
        arrayList.add("How can I go to Tianwang Mountain");
        for(String elem:arrayList){
            map.put("黑话", elem);
            arrayListNew.add(map.toString());
        }
        System.out.println(arrayListNew);
	}
}

　　The print result is as follows;

[{Black words = Heavenly King Covering Tiger}, {Black words = Pagoda Town River Demon}, {Black words = Pheasant boring head drill}, {Black words = How can I go to Tianwang Mountain}]　　

Example 2. There are jsonObject key-value pairs in the ArrayList array. The example code is as follows

@Test
	public void testUpsert() throws JSONException {
	    ArrayList<String> arrayList = new ArrayList<String>();
        JSONObject jsonObject=new JSONObject();
        ArrayList<String> arrayListNew = new ArrayList<String>();
        Map<String, String> map=new HashMap<String, String>();
        arrayList.add("The King of Heaven and Earth Tiger");
        arrayList.add("Pagoda Town River Demon");
        arrayList.add("pheasant boring");
        arrayList.add("How can I go to Tianwang Mountain");
        for(String elem:arrayList){
            jsonObject.put("黑话", elem);
            arrayListNew.add(jsonObject.toString());
        }
        System.out.println(arrayListNew);
	}
}

　　The print result is as follows;

[{"Black Talk":"Tianwang Covering Tiger"}, {"Black Talk":"Pagoda Town River Demon"}, {"Black Talk":"Pheasant Drilling"}, {"Black Talk":"How can I go to Tianwang Mountain" }]