数组的操作：查表法。

import java.util.Scanner;

public class Demo08_Array {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("请输入对应的星期几，范围在1-7之间");
int week = sc.nextInt();
System.out.println("星期"+getWeek(week));
}

public static char getWeek(int week) {
char[] arr = {' ','一','二','三','四','五','六','七'}; // 定义了一张星期表
return arr[week];
}
}