题解 | #删除字符串中出现次数最少的字符#
删除字符串中出现次数最少的字符
https://www.nowcoder.com/practice/05182d328eb848dda7fdd5e029a56da9
1.将字符及其出现次数存入map，遍历map获取出现最少的字符次数； 2.遍历map根据出现次数等于最少出现次数条件操作，组装最终输出结果；
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.HashMap;
public class StrOperate_del_HJ23 {
public static void main(String[] args) throws Exception{
BufferedReader read = new BufferedReader(new InputStreamReader(System.in));
String line = null;
while((line = read.readLine()) != null){
HashMap<Character,Integer> temp =new HashMap<>();
char [] input=line.toCharArray();
for(char s:input){
String lastLine=line.replaceAll(String.valueOf(s),"");
temp.put(s,line.length()-lastLine.length());
}
//快速找出最小值
int min = Integer.MAX_VALUE;
for (int times:temp.values()){
min = Math.min(min,times);
}
//组织输出结果
String outputStr = line;
for (HashMap.Entry<Character,Integer> entry : temp.entrySet()){
String minChar = String.valueOf(entry.getKey());
int mintimes = entry.getValue();
if(mintimes==min){
outputStr=outputStr.replaceAll(minChar,"");
}
}
System.out.println(outputStr);
}
}
}
