datesort.java

来自「这是一系列的java关于数组的程序」· Java 代码 · 共 59 行

public class DateSort {
	public static void main(String[] args) {
		Date[] days = new Date[5];
		days[0] = new Date(2008,8,8);
		days[1] = new Date(2008,7,8);
		days[2] = new Date(2007,8,8);
		days[3] = new Date(2007,8,9);
		days[4] = new Date(2004,2,2);
		
		bubbleSort(days);
		print(days);
	}
	
	
	
	public static Date[] bubbleSort(Date[] a) {
		int len = a.length;
		for(int i=len-1; i>=1; i--)
			for(int j=0; j<=i-1; j++) {
				if(a[j].compare(a[j+1]) > 0) {
					Date temp = a[j];
					a[j] = a[j+1];
					a[j+1] = temp;
				}
			}
		return a;
	}
	
	
	
	public static void print(Date[] a) {
		for(int i=0; i<a.length; i++) {
			System.out.println(a[i]);
		}
	}
}

class Date {
	int year,month,day;
	
	public Date(int year,int month,int day) {
		this.year = year;
		this.month = month;
		this.day = day;
	}
	
	public int compare(Date a) {
		return (year > a.year) ? 1 :
					 (year < a.year) ? -1 :
					 (month > a.month) ? 1 :
					 (month < a.month) ? -1:
					 (day > a.day) ? 1 :
					 (day < a.day) ? -1 : 0 ;			
	}
	
	public String toString() {
		return "year-month-day" + "--" + year + ":" + month + ":" +day;
	}
}