java - Number Format exception in GSON while parsing json -

i'm getting below exception,

exception in thread "main" com.google.gson.jsonsyntaxexception: java.lang.numberformatexception: input string: "instrument1" 

here json

[{      "_id":"ins_123",    "global_us":{         "productid":"ins_123",       "productnameglobal":"instrument1",       "brand name":"brand",       "producttype":"instrument",       "status":"avail",       "channel":"channel",       "instrumemtcode":"instrument1",       "lifecyclestatus":""    },    "en_us":{         "productid":"ins_123",       "productnameglobal":"instrument1",       "brand name":"brand",       "producttype":"instrument",       "status":"avail",       "channel":"channel",       "instrumemtcode":"instrument1",       "lifecyclestatus":""       } }, {      "_id":"ins_124",    "global_us":{         "productid":"ins_124",       "productnameglobal":"instrument2",       "brand name":"brand",       "producttype":"instrument",       "status":"avail",       "channel":"channel",       "instrumemtcode":"instrument2",       "lifecyclestatus":""    },    "en_us":{         "productid":"ins_124",       "productnameglobal":"instrument2",       "brand name":"brand",       "producttype":"instrument",       "status":"avail",       "channel":"channel",       "instrumemtcode":"instrument2",       "lifecyclestatus":""      } } ] 

and in code we've 2 pojo classes , read json business class

public class product {      private global global_us;      public global getglobal_us() {         return global_us;     }      public void setglobal_us(global global_us) {         this.global_us = global_us;     }      private string productid;     private int productglobalname;      public string getproductid() {         return productid;     }      public void setproductid(string productid) {         productid = productid;     }      public int getproductglobalname() {         return productglobalname;     }      public void setproductglobalname(int productglobalname) {         productglobalname = productglobalname;     }  } 

global.java

public class global {      private string productid;     private int productnameglobal;      public string getproductid() {         return productid;     }      public void setproductid(string productid) {         productid = productid;     }      public int getproductnameglobal() {         return productnameglobal;     }      public void setproductnameglobal(int productnameglobal) {         productnameglobal = productnameglobal;     }  } 

and business logic class readjson.java

package com.test.practice.gson;  import com.google.gson.gson; import java.io.filereader; import java.io.ioexception; import java.io.reader;  public class readjson {      public static void main(string[] args) {          gson gson = new gson();          try (reader reader = new filereader("d:\\json\\productlist.json")) {              // convert json java object             product[] productlist = gson.fromjson(reader, product[].class);             (product product : productlist) {                 system.out.println(product.getglobal_us().getproductnameglobal());             }          } catch (ioexception e) {             e.printstacktrace();         }      }  } 

there several question asked related numeric or double value. in json have string+numeric.

can on this.

that because productnameglobalattribute of type int in global class. in json passing string value field "productnameglobal":"instrument1".

may need change productnameglobal type string if business logic allows that.