对字符串数组进行排序，在冒泡法排序中使用compareTo()方法确定排序的顺序。

//A bubble sort for Strings.
public class SortString
{
static String arr[] = {"NOP","DEF","GHI","JK","LM","ABC","abc","Abc"};
public static void main(String[] args)
{
for(int i=0;i<arr.length;i++){
for(int j=i+1;j<arr.length;j++){
if(arr[j].compareTo(arr[i])<0){
//if(arr[j].compareToIgnoreCase(arr[i])<0){ //忽略大小写
String t = arr[i];
arr[i] = arr[j];
arr[j] = t;
}
}
System.out.println(arr[i]);
}
System.out.println("The End!");
}
}