[填空题] import java.util.*; public class LetterASortpublic static void main (String args [])ArrayList

[填空题] import java.util.^*;

public class LetterASort

public static void main (String args [])

ArrayList ＜String＞ strings = new ArrayList＜String＞ () ;

strings.add("aAaA") ;

strings.add ("AaA") ;

strings.add("aAa") ;

strings.add ("AAaa") ;

Collection.sort (strings) ;

for(Stirng s:strings) System.out.print (s+" ");

输出的结果是______.