Java计数单字节双字节字符个数的例子
/* 计数单双字符的个数并存储在Map对象中 */ import java.util.*; import java.io.*; public class CountChars{ public static void main(String args[]){ String ss="javaeye我是cjjwzs阿"; CountChars c=new CountChars(); c.count(ss); } private void count(String s){ Map<String,Integer> counter=new HashMap<String,Integer>(); List<String> lSingel=new LinkedList<String>(); List<String> lDouble=new LinkedList<String>(); int singelC=0,doubleC=0; for(int i=0;i<s.length();i++){ int c=String.valueOf(s.charAt(i)).getBytes().length; if(counter.containsKey(String.valueOf(s.charAt(i)))==false){ counter.put(String.valueOf(s.charAt(i)),1); }else{ int tempc=counter.get(String.valueOf(s.charAt(i))); tempc++; counter.put(String.valueOf(s.charAt(i)),tempc); } switch(c){ case 1: singelC++; if(lSingel.contains(String.valueOf(s.charAt(i)))){ break; }else{ lSingel.add(String.valueOf(s.charAt(i))); } break; case 2: doubleC++; if(lDouble.contains(String.valueOf(s.charAt(i)))){ break; }else{ lDouble.add(String.valueOf(s.charAt(i))); } break; } } Set<String> set=counter.keySet(); Iterator it=set.iterator(); System.out.println("各个字符的个数为:"); while(it.hasNext()){ String sss=String.valueOf(it.next()); System.out.print(sss+"="+counter.get(sss)+","); } System.out.println(); System.out.println("单字节字符数目："+singelC+",双字节字符数目："+doubleC); System.out.println("单字节字符为"+lSingel); System.out.println("双字节字符为"+lDouble); } } ??