一、题目
输入例子1:
If not now when , if not me who?
输出例子1:
if 2
not 2
now 1
when 1
me 1
who 1
二、代码实现
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Scanner;
public class CountWordOccurrences {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Map<String, Integer> map = new LinkedHashMap<>();
while (sc.hasNext()) {
String s = sc.nextLine();
String[] splitArr = s.trim().split("[,。?,.? ]");
for (int i = 0; i < splitArr.length; i++) {
if (!("".equals(splitArr[i]))) {
Iterator<String> it = map.keySet().iterator();
boolean exist = false;
while (it.hasNext()) {
String key = it.next();
if (key.equalsIgnoreCase(splitArr[i])) {
exist = true;
map.put(key, map.get(key) + 1);
}
}
if (exist == false) {
map.put(splitArr[i], 1);
}
}
}
for (Map.Entry<String, Integer> entry : map.entrySet()) {
System.out.println(entry.getKey() + " " + entry.getValue());
}
}
}
}