String[] ss={"eee","ddd","aaa","bbb","ccc"}
Arrays.sort(ss)//给数组ss排序 执行后ss就已经被排过序了。
System.out.println(Arrays.toString(ss))
结果:[aaa, bbb, ccc, ddd, eee]
String[] a = new String[]{"A","B","C","D","E"}String[] b=new String[a.length]
int indexA=a.length-1,indexB=0
for(String s:a){
b[indexB]=a[indexA]
indexA--
indexB++
}