Java大小写字母顺序排序 Java实现按照大小写字母顺序排序的方法

import java.util.*;
/**
 * 大小写字母的排序
 * @author Administrator
 *
 */
public class z {
 //上边是按大写在后的进行排序
 static Map<Character,Float> map=new HashMap<Character,Float>();//hashMap允许null值
 //按大写在前的进行排序
 static Map<Character,Float> map1=new HashMap<Character,Float>();//hashMap允许null值
 //
 static{
  Character ch;
  for (ch = 65; ch < 91; ch++) {//大写65.0；66.0；67.0；68.0
   map.put(ch,(float)ch.hashCode());
  }
  for (ch = 97; ch < 123; ch++) {//小写64.5；65.5
   map.put(ch,(float)ch.hashCode()-(float)32-0.5f);
  }
  for (ch= 65; ch < 91; ch++) {//大写65.0；66.0；67.0；68.0
   map.put(ch, (float)ch.hashCode());
  }
  for (ch = 97; ch < 123; ch++) {//小写64.5；65.5
   map.put(ch, (float)ch.hashCode()-(float)32+0.5f);
  }
 }
 /**
  * @first 大写在后的数组值在map中找 value的值
  * @second 通过Collections的排序方法得到递增数List
  * @third 反操作map得到char值
  * @param ar要排序的数组
  */
 public List addList(char[] ar){
  List list =new java.util.ArrayList();
  for (int i = 0; i < ar.length; i++) {
   list.add(map.get(ar[i]));
  }
  List lis=new ArrayList();
  Collections.sort(list);
  Iterator it=list.iterator();
  while(it.hasNext()){
   String str=it.next().toString();
   if(str.endsWith(".0")){
    lis.add((char)Float.parseFloat(str));
   }else{
    lis.add((char)(Float.parseFloat(str)+0.5+32));
   }
  }
  return lis;
 }
 /**
  * 大写在前的数组值在map中找value的值
  * @param ar
  * @return
  */
 public List addList1(char[] ar){
  List list=new java.util.ArrayList();
  for (int i = 0; i < ar.length; i++) {
   list.add(map.get(ar[i]));
  }
  List lis=new ArrayList();
  Iterator it=list.iterator();
  while(it.hasNext()){
   String str=it.next().toString();
   if(str.endsWith(".0")){
    lis.add((char)Float.parseFloat(str));
   }else{
    lis.add((char)(Float.parseFloat(str)+0.5-32));
   }
  }
  return lis;
 }
 public static void main(String []args){
  System.out.println("测试结果：");
  char ch [] ={'A','a','b','f','m','K'};
  List list=new z().addList(ch);
  Iterator it=list.iterator();
  while(it.hasNext()){
   System.out.println(it.next()+",");
  }
 }
}