>>710
public static void main(String[] args) {
String[] a = {"あい","うえ","お","かか","きき","こ"} ;
String[] b = {"あい","け","お","こ","ちち","た"} ;
Set setA = new LinkedHashSet(Arrays.asList(a));
Set setB = new LinkedHashSet(Arrays.asList(b));
setB.removeAll(setA);
Iterator it = setB.iterator();
while (it.hasNext()) {
System.out.println(it.next());
}
}