控制台输入若干个学生的姓名及所在系,并统计各系的学生人数Java
时间: 2024-05-27 10:14:18 浏览: 11
import java.util.HashMap;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
HashMap<String, Integer> departmentCount = new HashMap<>();
while (true) {
System.out.print("请输入学生姓名(输入exit退出):");
String name = scanner.nextLine();
if (name.equals("exit")) {
break;
}
System.out.print("请输入学生所在系:");
String department = scanner.nextLine();
Integer count = departmentCount.get(department);
if (count == null) {
count = 0;
}
count++;
departmentCount.put(department, count);
}
System.out.println("各系学生人数统计结果:");
for (String department : departmentCount.keySet()) {
Integer count = departmentCount.get(department);
System.out.println(department + ":" + count + "人");
}
}
}
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