JAVA基礎(第15天 字符串排序 打印日曆)

字符串排序

package com.wdzl.homework;

import java.util.Arrays;

public class TestSortString {
//	public static void main(String[] args) {
//		String s = "qasdfghjkl";
//		char[] c = s.toCharArray();
//		Arrays.sort(c);
//		System.out.println(new String(c));
//	}
	//對字符串進行自動排序
	public static void main(String[] args) {
		String s = "fioeodndofnveogeoefwofpw";
		char c[] = s.toCharArray();
//		Arrays.sort(c);
		Arrays.parallelSort(c);
		System.out.println(new String(c));
	}
}

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打印日曆

package com.wdzl.homework;

import java.util.Calendar;
import java.util.Scanner;

/**
 * 日曆
 *
 */
public class TestCalendar {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println("請輸入年份：");
		int year = sc.nextInt();
		System.out.println("請輸入月份：");
		int month = sc.nextInt();
		System.out.println("請輸入日期：");
		int date = sc.nextInt();
		
		//定義日曆類的一個對象
		Calendar cal = Calendar.getInstance();
		//先把日曆翻到 當月1號（month的範圍（0-11），而正常輸入的month是（1-12））
		cal.set(year, month-1, 1);
		//當月1號 是周幾   日-1
		int week = cal.get(Calendar.DAY_OF_WEEK);
		
		//當月一天多少天
		int days = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
		
		String header = "日一二三四五六";
		for (int i = 0; i < header.length(); i++) {
			System.out.print(header.charAt(i)+"\t");
		}
		System.out.println();
		//空格數
		for (int i = 0; i < week-1; i++) {
			System.out.print("\t");
		}
		//日期
		for (int i = 1; i <= days; i++) {
			if(i==date) {
				System.out.print("["+i+"]\t");
			}else {
				System.out.print(i+"\t");
			}
			//換行
			if((i+week-1)%7==0) {
				System.out.println();
			}
		}
	}
}

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