【文件属性】：
文件名称：输出周一至周日
文件大小：512B
文件格式：JAVA
更新时间：2022-04-05 12:56:52
java
package lesson05;
import java.util.Collection;
import java.util.HashMap;
public class Topic_5_1 {
public static void main(String[] args) {
HashMap day = new HashMap();
day.put("1", "Monday");
day.put("2", "Tuesday");
day.put("3", "Wednesday");
day.put("4", "Thursday");
day.put("5", "Friday");
day.put("6", "Saturday");
day.put("7", "Sunday");
Collection<?> days = day.entrySet();
System.out.println(day);
System.out.println(days);
}
}
