import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Map;
import java.util.HashMap;
import com.google.gson.Gson;
import com.alibaba.fastjson.JSON;
import com.cctvmall.entity.User;
public class Str
{
public static void main(String args[])
{
String username = "chen jian ping";
System.out.println(username);
System.out.println(username.charAt(2));
// System.out.println(username.codePointAt(2));
System.out.println(username.concat("Li Ming"));
System.out.println(username.contains("ping"));
List stu = new ArrayList<>();
stu.add("chen");
stu.add("jian");
stu.add("ping");
Iterator it = stu.iterator();
while(it.hasNext()) {
String str = (String)it.next();
System.out.println(str);
}
List stu1 = new ArrayList();
stu1.add("³Â");
stu1.add("½¨");
stu.addAll(1, stu1);
Gson g = new Gson();
System.out.println(g.toJson(stu));
for(int i = 0; i < stu.size(); i = i + 1) {
System.out.println(stu.get(i));
}
Map stu2 = new HashMap();
stu2.put("name", "chen");
stu2.put("age", 23);
stu2.put("data", stu);
System.out.println(g.toJson(stu2));
System.out.println(JSON.toJSONString(stu2));
String array_json = "[{'id':1,'username':'ÕÅ·É','age':68},{'id':2,'username':'ÕÔÔÆ','age':78}]";
List users = JSON.parseArray(array_json, User.class);
// System.out.println(g.toJson(users));
for(int j = 0; j < users.size(); j = j + 1) {
User user = users.get(j);
System.out.println(user.getUsername());
}
}
}