public class DateSort {
public static void main(String[] args) {
Date[] days = new Date[5];
days[0] = new Date(2006, 5, 4);
days[1] = new Date(2006, 7, 4);
days[2] = new Date(2008, 5, 4);
days[3] = new Date(2004, 5, 9);
days[4] = new Date(2004, 5, 4);
//selectionSort(days);
bubbleSort(days);
for (int i = 0; i < days.length; i++) { System.out.println(days[i]);
}
} /*public static Date[] selectionSort(Date[] a) {
for (int i = 0; i < a.length; i++) {
for (int j = i + 1; j < a.length; j++) {
if (a[i].compare(a[j]) > 0) {
Date temp = a[i];
a[i] = a[j];
a[i] = temp;
}
}
} return a;
}
}*/
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;
}
}
class Date {
int year, month, day; Date(int y, int m, int d) {
year = y;
month = m;
day = d;
} public int compare(Date date) {
return year > date.year ? 1 : year < date.year ? -1
: month > date.month ? 1 : month < date.month ? -1
: day > date.day ? 1 : day < date.day ? -1 : 0;
}
public String toString() {
return "Year:Month:Day -- " + year + "-" + month + "-" + day;
}
}
a[i] = a[j];
a[i] = temp;
这里赋值写错了
temp = a[i]
a[i] = a[j]
a[j] = temp
这样就行了