当前日期一个月以后的日期

public String nextMonth(){
Date date = new Date();
int year=Integer.parseInt(new SimpleDateFormat("yyyy").format(date));
int month=Integer.parseInt(new SimpleDateFormat("MM").format(date))+1;
int day=Integer.parseInt(new SimpleDateFormat("dd").format(date));
if(month==0){
year-=1;month=12;
}
else if(day>28){
if(month==2){
if(year%400==0||(year %4==0&&year%100!=0)){
day=29;
}else day=28;
}else if((month==4||month==6||month==9||month==11)&&day==31)
{
day=30;
}
}
String y = year+"";String m ="";String d ="";
if(month<10) m = "0"+month;
else m=month+"";
if(day<10) d = "0"+day;
else d = day+"";
System.out.println(y+"-"+m+"-"+d);
return y+"-"+m+"-"+d;
}