java编写日历

Myth丶恋晨 2022-04-01 12:52 285阅读 0赞

**java编写日历**

代码  
\`import java.util.Scanner;

public class Calendar1\{  
public static int monthday,year,month,day;  
public static void main(String\[\] args)\{  
Scanner sc = new Scanner([System.in][]);  
System.out.println(“请输入当前日期，年月日用空格隔开：”);  
String temp = sc.nextLine();  
String\[\] ss = temp.split(" “); //split() 方法根据匹配给定的正则表达式来拆分字符串。  
year = Integer.parseInt(ss\[0\]); //parseInt() 方法用于将字符串参数作为有符号的十进制整数进行解析。  
month = Integer.parseInt(ss\[1\]);  
day = Integer.parseInt(ss\[2\]);  
boolean flag2 = isRun(year);  
if(flag2)\{  
System.out.println(”\\t\\t"+“闰年”);  
\}else\{  
System.out.println("\\t\\t"+“平年”);  
\}  
getdays(year,month);  
Calendar(year,month,day);

}
    public static boolean isRun(int year){
    	if((year%4==0&&year%100!=0)||year%400==0) {
        	return true;
        }else {
        	return false;
        	}
    }
    public static int getdays(int year,int month){
    	if(month==1||month==3||month==5||month==7||month==8||month==10||month==12) {
        	monthday=31;
        }else if(month==4||month==6||month==9||month==11){
        	monthday=30;
        }else if(month==2){
    		boolean flag1 = isRun(year);
    		if(flag1){
    			monthday = 29;
    		}else{
    			monthday = 28;
    		}
    	}
    	return monthday;
    }
    public static int Calendar(int y,int m,int d){
    	int startDay,w,w1;
    	if(m == 1 || m == 2)
        {
            m += 12;
            y--;
        }
          /*基姆拉尔森计算公式
           * Week=(Day + 2*Month + 3*(Month+1）/5 + Year
           *  + Year/4 - Year/100 + Year/400) % 7 */
                       
        w = (d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)+1;
        while(w>7) {
        	w=w-7;
        }
        
        //判断每个月第一天是周几，来确定日历日期开始的位置
        w1 = (2*m+3*(m+1)/5+y+y/4-y/100+y/400)+2;
        while(w1>7) {
        	w1=w1-7;
        }
        if(w1==7) {
        	 startDay=0;
        }else {
        	 startDay=w1;
        }
        
        //显示内容
        System.out.println("\t"+year+"年"+month+"月"+day+"日"+"星期"+w);
        System.out.println("-----------------------------");
        System.out.println(" Sun Mon Tue Wed Thu Fri Sat");
    	
        int i;
          for (i = 0; i < startDay; i++)   
            System.out.print("    ");   //开始日期不为周日，则在前面补空格
          for (i = 1; i <= monthday; i++) {
            if (i < 10)
              System.out.print("   " + i);
            else
              System.out.print("  " + i);//为了界面和谐，十位数比个位数少一个空格
    
            if ((i + startDay) % 7 == 0) //判断何时该换行输出
              System.out.println();
          }
    	  return w;
    }

\}\`  
![运行结果][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQxNjY4Ng_size_16_color_FFFFFF_t_70]

[System.in]: http://System.in
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQxNjY4Ng_size_16_color_FFFFFF_t_70]: /images/20220401/e53a4f82b05c4e4db5da3d0fe5f74907.png