新手求助！

[sbzxm]

package pagerank;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.Hashtable;

public class PageRank {

public static void main(String[] args) throws Exception {

String[] linesarr;
Hashtable<String, Integer> docIDandNum = new Hashtable<String, Integer>();
int total = 0;
int father, son;
int outdegree = 0;

// 读取文件，得到docid，计算链接总数total，outdegree在迭代的时候计算
File linkfile = new File("D:\\a.txt");
BufferedReader linkinput = new BufferedReader(new FileReader(linkfile));
String line = linkinput.readLine();
while (line != null) {
++total;
linesarr = line.split(" ");
if (linesarr.length > 0) {
outdegree = linesarr.length - 1;
for(int j = 1; j <= linesarr.length - 1; ++j) {
if(linesarr[j].equals(linesarr[0]))
outdegree--;
}
if (linesarr[0] != null) {
docIDandNum.put(linesarr[0], total);
System.out.println("链接" + linesarr[0] + "的出度为" + outdegree);
}
}
linesarr = null;
line = linkinput.readLine();
}
linkinput.close();
System.out.println("链接总数为：" + total);

if (total > 0) {
// PageRank[]存放PR值
float[] pageRank = new float[total + 1];

// 链入页面的计算总和
float[] prTmp = new float[total + 1];

// 设置pageRank[]初始值为1.0f
for (int i = 1; i <= total; ++i) {
pageRank[i] = 1.0f;
prTmp[i] = 0.0f;
}

// 当前页面的PR值
float fatherRank = 1f;

// 阻尼系数d或称为alpha
float alpha = 0.85f;

// 进行10次迭代
for (int iterator = 0; iterator < 10; iterator++) {
long startTime = System.currentTimeMillis();

linkinput = new BufferedReader(new FileReader(linkfile));
line = linkinput.readLine();
// 读出docid和outdegree和sons
while (line != null) {
linesarr = line.split(" ");
if (linesarr.length > 0) {
outdegree = linesarr.length - 1;
for (int j = 1; j <= linesarr.length - 1; ++j) {
// 指向自身的链接无效，不计算在内
if (linesarr[j].equals(linesarr[0]))
outdegree--;
}
}
if (outdegree > 0) {
father = (int) docIDandNum.get(linesarr[0]);
// 对应公式中的pr(Ti)/c(Ti),Ti为指向father的页面
fatherRank = pageRank[father] / outdegree;
for (int k = 1; k <= linesarr.length - 1; ++k) {
if (linesarr[k].equals(linesarr[0])) {
continue;
}
son = docIDandNum.get(linesarr[k]);
if (total >= son && son >= 0) {
prTmp[son] += fatherRank;
}
}
}
linesarr = null;
line = linkinput.readLine();
}

// 准备下次迭代的初始值
for (int i = 1; i <= total; ++i) {
// PR公式1
prTmp[i] = 0.15f + alpha * prTmp[i];

// PR公式2
prTmp[i] = 0.15f / total + alpha * prTmp[i];

// 每次迭代后的真正pr值
pageRank[i] = prTmp[i];

prTmp[i] = 0.0f;
}
// 打印出每次迭代值，此操作耗费时间和内存
for (int i = 1; i <= total; ++i)
System.out.print(pageRank[i] + " \t ");
System.out.println(" ");
linkinput.close();

long endTime = System.currentTimeMillis();
System.out.println("第" + iterator + "次迭代耗时" + (endTime - startTime) + "ms");
}

//最终PR值输出至文件
BufferedWriter newlink = new BufferedWriter(new FileWriter(
new File("D:\\b.txt")));
for (int i = 1; i <= total; ++i) {
System.out.println(docIDandNum.toString());
newlink.write(String.valueOf(pageRank[i]));
newlink.newLine();
}
newlink.flush();
newlink.close();
pageRank = null;
prTmp = null;
}
}
}
这是PageRank算法实现的一段参考代码，问下大神文本D:\\a.txt的输入规则是啥

[sbzxm]

问过别人，人家说代码不全，缺少类，求大神把代码补全一下