Question

At the moment I have this:

try{
            // Create file 
            FileWriter fstream = new FileWriter("output");
            BufferedWriter out = new BufferedWriter(fstream);
            Iterator mapIt = assignments.entrySet().iterator();
            while (mapIt.hasNext()){
                out.write(mapIt.next().toString()+";\n");
            }
            //Close the output stream
            out.close();
        }

The thing is, I can’t just take the toString() of iterator, I need to take out the key and the value separately so I can put some stuff between them in the outputfile. Does anyone know how I do this?

Answer 1

You will notice the iterator returns a Map.Entry which has getKey and getValue methods.

Use those to get the respective items….something like

while (mapIt.hasNext()){
   Map.Entry entry = mapIt.next();
   Object key = entry.getKey();
   Object value = entry.getValue();
   // format away..
}

Note I put Object as the types of key and val, but you should specify the types according to however you defined the Map.