import java.util.LinkedHashMap;
import java.util.List;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

/**
*泛型转换
*/
public class GenericSweepCode {


 public static void main(String[] args) throws Exception {
 Proto proto =new Test.Proto();
 List<Object> list = Lists.newArrayList();
 LinkedHashMap<String,String> map = Maps.newLinkedHashMap();
 map.put("1","2");
 list.add(map);
 proto.setData(list);//data Object 类型
 List<Integer> list2 = (List<Integer>) proto
 .getData();//
 list2.forEach(item->item.intValue());
 //java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to java.lang.Integer
 }

 static class Proto {
 public int code;
 public String msg;
 public Object data;

 public int getCode() {
 return this.code;
 }

 public void setCode(int code) {
 this.code = code;
 }

 public String getMsg() {
 return this.msg;
 }

 public void setMsg(String msg) {
 this.msg = msg;
 }

 public Object getData() {
 return this.data;
 }

 public void setData(Object data) {
 this.data = data;
 }

 public Proto() {
 }

 public Proto(int code, String msg) {
 this.code = code;
 this.msg = msg;
 }

 public Proto(int code, String msg, Object data) {
 this.code = code;
 this.msg = msg;
 this.data = data;
 }

 }

}