@SuppressWarnings("unchecked")
public class classA{...}

@SuppressWarnings("unchecked")
private void method1(){...}

@SuppressWarnings("unchecked")
private List list1;

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2 Comments

1. maninder says:

   March 9, 2010 at 9:30 am

   sir i am working on jdk ver 6.0 I am getting a type unchecked warning when i am compiling a code what to do to remove a error

   code

   package com.example.model;
   import java.util.*;
   import java.lang.*; 
    
   public class BeerExpert 
   {
   public List getBrands(String color)  {
   List brands = new ArrayList();
   if (color.equals("amber")){
   brands.add("Jack Amber ");
   brands.add("Red Moose");
    
   }
   else{
   brands.add("Jail Pale Ale");
   brands.add("Gout Stout");
   }
   return(brands);
   }
   }

   Reply
   • mkyong says:

     March 9, 2010 at 9:44 am

     It caused by the generic data type is undefined in your List.

     Solution ..

     1. Add @SuppressWarnings(“unchecked”) to ignore the checking.

     @SuppressWarnings("unchecked")
     public class test
     {

     2. Declare the data type for your List

     package com.mkyong.common;
      
     import java.util.*;
      
     public class test
     {
     	public static void main( String[] args )
     	{
     		 List<String> colors = getBrands("amber");
     		 for(String color: colors){
     			 System.out.println("Color : " + color);
     		 }
     	}
      
     	public static List<String> getBrands(String color) {
     		List<String> brands = new ArrayList<String>();
     		if (color.equals("amber")){
     			brands.add("Jack Amber");
     			brands.add("Red Moose");
     		}else{
     			brands.add("Jail Pale Ale");
     			brands.add("Gout Stout");
     		}
     		return(brands);
     	}
     }

     Reply