输出所有和为n连续正数序列

public class CNumbers {

public ArrayList<Range> getRange(int n){
assert(n > 0);
ArrayList<Range> list = new ArrayList<Range>();
for(int i=1; i<=n/2; i++){
int v = 2*n + i*i -i;
for(int j=i; j*j<v; j++){
if(j*(j+1) == v){
list.add(new Range(i,j));
break;
}
}
}

return list;
}

public class Range{
public int x;
public int y;

public Range(int x, int y){
this.x = x;
this.y = y;
}
}
/**
* @param args
*/
public static void main(String[] args) {
CNumbers cn = new CNumbers();
ArrayList<Range> list = cn.getRange(15);
for(Range r : list){
for(int i=r.x; i<=r.y; i++){
System.out.print(i + " " );
}
System.out.println();
}

}

}