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public static int task1_pljava( String[] words1, String[] words2 ) throws SQLException {
logger.log( Level.INFO, "Entering pwc277.task1_pljava" );
final Map<String, Integer[]> counting = new HashMap<String, Integer[]>();
Stream.of( words1 ).forEach( current -> {
Integer[] count = { 0, 0 };
counting.putIfAbsent( current, count );
count = counting.get( current );
count[ 0 ]++;
counting.put( current, count );
} );
Stream.of( words2 ).forEach( current -> {
Integer[] count = { 0, 0 };
counting.putIfAbsent( current, count );
count = counting.get( current );
count[ 1 ]++;
counting.put( current, count );
} );
return (int) counting.entrySet().stream().filter( current -> {
Integer[] count = current.getValue();
return count[ 0 ] == count[ 1 ] && count[ 0 ] == 1;
} ).count();
}
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