java - Want to use properties file for storing and for reading hashmap -


i have codes , corresponding states it.

  1. i want read properties file data. not reading if populate data file. hence have supply externally using file writer. if populate data , read give error as:

    file not found exception

  2. i want data when letter in key asked. when write m, want data key starting m. eg m - mh:maharashtra,mn-manipur,ml=meghalaya,...

my code far:

public class codeproperties {     public static void main(string[] args) {         createcodeprop();         map<string, string> props = loadcode();         printconsole(props);     }      // write new properties file in java      private static void createcode() {         properties p = new properties();         p.setproperty("mh", "maharashtra");         p.setproperty("sk", "sikkim");         p.setproperty("mp", "madhya pradesh");         p.setproperty("mn", "manipur ");         p.setproperty("ml", "meghalaya");         p.setproperty("mz", "mizoram");         filewriter writer = new filewriter("code.properties");         p.store(writer, "states , code");         writer.close();     }      // read properties file in java      static map<string, string> loadcode() {          map<string, string> propertymap = new hashmap<string, string>();         filereader reader = new filereader("code.properties");         properties p = new properties();         p.load(reader);         enumeration keys = p.propertynames();         while (keys.hasmoreelements()) {             string key = (string) keys.nextelement();             propertymap.put(key, p.getproperty(key));         }         reader.close();         return propertymap;     }      // print properties console      static void printconsole(map<string, string> props) {         scanner in = new scanner(system.in);         system.out.println("enter code want state for");         string code = in.next();          (string key : props.keyset()) {              if (key.contentequals(code))                 system.out.println(key + ":" + props.get(key));         }     } }


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