22일차

package days22;

import java.util.Arrays;
import java.util.Scanner;

/**
 * @author 지민
 * @date 2022. 3. 21. - 오전 11:07:32
 * @subject 
 * @content 
 * 
 */
public class Ex01_02 {

	public static void main(String[] args) {
		int n; //막대 수 
		Scanner sc=new Scanner(System.in);
		n=sc.nextInt();
		
		//막대 길이 입력받는것 
		int[] sticks=new int[n];
		for (int i = 0; i < sticks.length; i++) {
			sticks[i]=sc.nextInt();
		}
		
		System.out.println(Arrays.toString(sticks));
		
		Arrays.sort(sticks);
		System.out.println(Arrays.toString(sticks));
		int idx=0;
		int value;
		
		do {
			System.out.println(n-idx);
			value=sticks[idx];
			while(value==sticks[++idx]);
		}while(idx<n);
}
}

 

Date 

2010년 5월 1일은 무슨 요일?

String rrn =   "890212";
      // 오늘 날짜
      Date today = new Date();
      // 시간/분/초 절삭
      today.setHours(0);    // 12            ***
      today.setMinutes(0); // 50
      today.setSeconds(0);
      
      int b_month =  Integer.parseInt( rrn.substring(2, 4) ) -1;
      int b_date = Integer.parseInt( rrn.substring(4, 6) ) ;
      Date birthday = new Date( today.getYear(), b_month, b_date);
      
      System.out.println(  birthday.after(today) );   // false
      System.out.println(  birthday.before(today) );   // true
      System.out.println(  birthday.equals(today) );   // false      
      
      System.out.println( birthday.compareTo(today) );  // -1(안지남)  0(오늘이생일)   1(지남)

 

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