Java实现按照大小写字母顺序排序的方法

本文实例讲述了Java实现按照大小写字母顺序排序的方法。分享给大家供大家参考，具体如下：

这里排序需要得到的结果按字母顺序。如：a-----z...

import java.util.*;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);  } }  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; }  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("编程网测试结果：");  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()+",");  } }}