Question

java中，输入字符串，把重复的输出，只能输出一次，并且输出重复了几次。

Answer 1

public static void main(String[] args) {
String str ="aaabbccc";
Map<String,Integer> counterMap = new HashMap<String,Integer>();
for(int index = 0,len=str.length();index<len;index++){
String temp = str.substring(index,index+1);
if(counterMap.get(temp)==null){
counterMap.put(temp, 1);
}else{
Integer count = counterMap.get(temp);
counterMap.put(temp,count+1);
}
}
for(String key :counterMap.keySet()){
System.out.println("key:"+key+" value:"+counterMap.get(key));
}

}

-----结果------
key:b value:2
key:c value:3
key:a value:3

Answer 2

o

Answer 3

要是有2个以上不同的字符串重复呢？
你的问题没说清楚