[java] isKeysExistInMap (keys ,map )

package test;

import java. util. ArrayList;
import java. util. HashMap;
import java .util . List;

public class testMapContainMultiKey {

       public static void main( String[] args ) {
             // TODO Auto-generated method stub

             ArrayList< String> keys = new ArrayList< String> ();
            keys .add ("a" );
            keys .add ("b" );

             HashMap< String, String > map = new HashMap<> ();
            map .put ("a" , "a" );
            map .put ("c" , "b" );

             System. out .println ( isKeysExistInMap (keys ,map ) );


       }

       public static boolean  isKeysExistInMap( ArrayList< String> keys , HashMap  map ) {
             boolean result = true;
             for (String key : keys) {
                 result = map. containsKey (key );
                 if (result == false ) {
                     return result;
                 }
             }
             return result;
       }

}