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Oct 13th, 2008

hashmap

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hi guys

i have quiestion. i m using hashmap and now what i have to use hashmap value and put that in the int variable, can u guys help with that. i just need some hints so i can work on that. thank you

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codered152

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Oct 13th, 2008

Re: hashmap

HashMap

Java Syntax (Toggle Plain Text)
HashMap map = new HashMap();
map.put("ONE",new Integer(1));
 
Integer integ = (Integer)map.get("ONE");
 
int value = integ.intValue();
HashMap map = new HashMap();
map.put("ONE",new Integer(1));

Integer integ = (Integer)map.get("ONE");

int value = integ.intValue();

Java Syntax (Toggle Plain Text)
HashMap map = new HashMap<String,Integer>();
        map.put("ONE",1);
 
        int integ = (Integer)map.get("ONE");
HashMap map = new HashMap<String,Integer>();
        map.put("ONE",1);

        int integ = (Integer)map.get("ONE");

Last edited by javaAddict; Oct 13th, 2008 at 2:18 pm.

javaAddict

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Oct 13th, 2008

Re: hashmap

I think you may have meant

Java Syntax (Toggle Plain Text)
        Map<String, Integer> map = new HashMap<String, Integer>();
        map.put("ONE", 1);
 
        int value = map.get("ONE");
        Map<String, Integer> map = new HashMap<String, Integer>();
        map.put("ONE", 1);

        int value = map.get("ONE");

Missing type on declaration and redundant cast on map.get().

Ezzaral

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Oct 13th, 2008

Re: hashmap

thank you for replies so soon. its making more sense for me now, but still there is some confusion, what i have is like this

private Map<Object, String> map= new HashMap <Object, String>();

and i need to create new int variable and use that to keep track of the that hashmap. so if u guys just explain me some more. thanks you.

codered152

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Oct 13th, 2008

Re: hashmap

Click to Expand / Collapse Quote originally posted by codered152 ...

thank you for replies so soon. its making more sense for me now, but still there is some confusion, what i have is like this

private Map<Object, String> map= new HashMap <Object, String>();

and i need to create new int variable and use that to keep track of the that hashmap. so if u guys just explain me some more. thanks you.

in other words can i do something like this.

int intVariable = map;

so all the hashmap value store in intVariable.

codered152

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Oct 13th, 2008

Re: hashmap

No, that does not make any sense at all. A Map is not an int by any conceptualization. Why do you feel you need to store a map in an int?

Ezzaral

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Oct 13th, 2008

Re: hashmap

Click to Expand / Collapse Quote originally posted by Ezzaral ...

No, that does not make any sense at all. A Map is not an int by any conceptualization. Why do you feel you need to store a map in an int?

because that's what i been told to do.

codered152

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Oct 13th, 2008

Re: hashmap

I doubt that is the case. Either you are not describing your question clearly enough or you misunderstood the requirement.

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Oct 13th, 2008

Re: hashmap

Here's what you can do:

java Syntax (Toggle Plain Text)
HashMap map = new HashMap();
map.put(new Integer(1), new String("ONE"));
map.put(new Integer(2), new String("TWO"));
map.put(new Integer(3), new String("THREE"));
 
int one = Integer.parseInt(map.get(new Integer(1)).toString());
and so on...
HashMap map = new HashMap();
map.put(new Integer(1), new String("ONE"));
map.put(new Integer(2), new String("TWO"));
map.put(new Integer(3), new String("THREE"));

int one = Integer.parseInt(map.get(new Integer(1)).toString());
and so on...

new_2_java

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Oct 13th, 2008

Re: hashmap

What on earth is that supposed to accomplish?

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