[unchecked] 未经检查的转换

Question

package cn.com;import  java.util.ArrayList;
import  java.util.List;public class SqlUser implements User{
    private int id;
    private String userid;
    private String password;
    private String name;
    private long lasttime;
    private String re;
private List<Object>  products;   //private List<Object> list;    public SqlUser(){
//ArrayList<Object> arraylist = new ArrayList<Object>();
        products = new ArrayList<Object>();
    }    public void setId(int id){
        this.id = id;
    }    public int getId(){
        return id;
    }    public void setUserid(String userid){
        this.userid = userid;
    }    public String getUserid(){
        return userid;
    }    public void setPassword(String password){
        this.password = password;
    }    public String getPassword(){
        return password;
    }    public void setName(String name){
        this.name = name;
    }    public String getName(){
        return name;
    }    public void setLasttime(long lasttime){
        this.lasttime = lasttime;
    }    public long getLasttime(){
        return lasttime;
    }    public void setRe(String re){
        this.re = re;
    }    public String getRe(){
        return re;
    }    public void setProducts(List products){
        this.products = products;
    }    public List getProducts(){
        return products;
    }    public void addProduct(Product product){
        products.add(product);
    }
}遍译会出现下面的提示：
SqlUser.java:71: 警告： [unchecked] 未经检查的转换
找到： java.util.List
需要： java.util.List<java.lang.Object>
        this.products = products;
                        ^
1 警告

Answer 1

jdk1.5以上支持的范型，改成这样就可以了．
public       void       setProducts(List <Object>       products){   
                                this.products       =       products;   
                }