可计算任意位水仙花数

复制代码 代码如下:
public static void main(String[] args) {
int max = 10;
for (int len = 1; len <= max; len++) {
System.out.println(getNarc(len, ""));
}
}

static StringBuffer strb = new StringBuffer();

static String getNarc(int len, String start) {
for (int basenum = 1; basenum <= 9; basenum++) {
if (len == 2 || len == 1) {
StringBuffer tmpbuf = new StringBuffer();
tmpbuf.append(start);
for (int j = 0; j < len; j++) {
tmpbuf.append(basenum);
}
tmpbuf.append(new StringBuffer(start).reverse().toString());
strb.append(tmpbuf);
strb.append("\n");
// System.out.println(tmpbuf);
} else if (len > 2) {
String nextStr = "";
if (null != start) {
nextStr = start + basenum;
} else {
nextStr = Integer.toString(basenum);
}
getNarc(len - 2, nextStr);
}
}
return strb.toString();
}