How to make a collection to iterate something through?











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The below code is giving me an error for the keys of "String item:keys". It is saying that an Object cannot be converted to a String. My TA said it's because I don't have the "keys" collection that's being iterated through - it doesn't exist. This is not like the Java import.util.Collection, but the collection of keys being iterated through...I'm not sure how to create it. How and where would I create it?



public String getLongDescription()

{

    String str = "You are " + description + ".n"; str+= getExitString() + ".n n"; str+= "This room contains :n";

    Set keys = itemsInRoom.keySet();

    for(String item : keys)

    {

        str+=item+":";

        str+=itemsInRoom.get(item).getItemDescription() + "n";

    }

    return str;

}





bluej







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    up vote
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    down vote

    favorite












    The below code is giving me an error for the keys of "String item:keys". It is saying that an Object cannot be converted to a String. My TA said it's because I don't have the "keys" collection that's being iterated through - it doesn't exist. This is not like the Java import.util.Collection, but the collection of keys being iterated through...I'm not sure how to create it. How and where would I create it?



    public String getLongDescription()
    
{
    
    String str = "You are " + description + ".n"; str+= getExitString() + ".n n"; str+= "This room contains :n";
    
    Set keys = itemsInRoom.keySet();
    
    for(String item : keys)
    
    {
    
        str+=item+":";
    
        str+=itemsInRoom.get(item).getItemDescription() + "n";
    
    }
    
    return str;
    
}





    bluej







    share|improve this question


























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      The below code is giving me an error for the keys of "String item:keys". It is saying that an Object cannot be converted to a String. My TA said it's because I don't have the "keys" collection that's being iterated through - it doesn't exist. This is not like the Java import.util.Collection, but the collection of keys being iterated through...I'm not sure how to create it. How and where would I create it?



      public String getLongDescription()
      
{
      
    String str = "You are " + description + ".n"; str+= getExitString() + ".n n"; str+= "This room contains :n";
      
    Set keys = itemsInRoom.keySet();
      
    for(String item : keys)
      
    {
      
        str+=item+":";
      
        str+=itemsInRoom.get(item).getItemDescription() + "n";
      
    }
      
    return str;
      
}





      bluej







      share|improve this question















      The below code is giving me an error for the keys of "String item:keys". It is saying that an Object cannot be converted to a String. My TA said it's because I don't have the "keys" collection that's being iterated through - it doesn't exist. This is not like the Java import.util.Collection, but the collection of keys being iterated through...I'm not sure how to create it. How and where would I create it?



      public String getLongDescription()
      
{
      
    String str = "You are " + description + ".n"; str+= getExitString() + ".n n"; str+= "This room contains :n";
      
    Set keys = itemsInRoom.keySet();
      
    for(String item : keys)
      
    {
      
        str+=item+":";
      
        str+=itemsInRoom.get(item).getItemDescription() + "n";
      
    }
      
    return str;
      
}





      bluej




      bluej






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      edited Nov 18 at 9:54









      dmcgrandle

      808215




      808215










      asked Nov 18 at 2:07









      zonk

      11




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