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);  
            }  
    }