使用“put”将数据添加到Hashmap(Adding data to a Hashmap using “put”)

 我想使用“put”将元素添加到hashmap。 但该程序不想编译。 我收到错误消息“无法找到符号 - 可变phoneBook”。 错误发生在“ phoneBook.put（name，number）; ”行。 
 
import java.util.HashMap;

public class MapTester {

     public void main(String args[]){

        HashMap<String, String> phoneBook = new HashMap<String, String>();
        phoneBook.put("Jenna Simpson", "3424 6785");       
     }

     public void enterNumber (String name, String number)
     {
         phoneBook.put(name, number);
     }
}

I want to add elements to a hashmap using "put". But the program does not want to compile. Am getting error message "cannot find symbol - variable phoneBook". The error occurs at line "phoneBook.put(name, number);".
 
import java.util.HashMap;

public class MapTester {

     public void main(String args[]){

        HashMap<String, String> phoneBook = new HashMap<String, String>();
        phoneBook.put("Jenna Simpson", "3424 6785");       
     }

     public void enterNumber (String name, String number)
     {
         phoneBook.put(name, number);
     }
}

原文：https://stackoverflow.com/questions/26660355