紧急求助，在线等待！！！！！！！__new_Panel_searchThread_String_vectorToSearch_

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紧急求助，在线等待！！！！！！！

来源: 互联网发布时间：2015-06-18

本文导语: 小弟做毕业设计，在网上下载了一段代码，经过修改如下 import java.text.*; import java.net.*; import javax.swing.*; import javax.swing.tree.*; import java.awt.event.*; import java.awt.*; import java.applet.Applet; import java.io.*; import java.util.*; pu...

小弟做毕业设计，在网上下载了一段代码，经过修改如下
import java.text.*;
import java.net.*;
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.event.*;
import java.awt.*;
import java.applet.Applet;
import java.io.*;
import java.util.*;

public class SuperLink extends Applet implements ActionListener, Runnable {
public static final String SEARCH = "Search";
    public static final String STOP = "Stop";

    Panel   panelMain;
    java.awt.List    listMatches;
    Label   labelStatus;

    // URLs to be searched
    Vector vectorToSearch;
    // URLs already searched
    Vector vectorSearched;
    // URLs which match
    Vector vectorMatches;

    Thread searchThread;

    TextField textURL;


    public void init(){
    // set up the main UI panel
panelMain = new Panel();
panelMain.setLayout(new BorderLayout(5, 5));

// text entry components
Panel panelEntry = new Panel();
panelEntry.setLayout(new BorderLayout(5, 5));

Panel panelURL = new Panel();
panelURL.setLayout(new FlowLayout(FlowLayout.LEFT, 5, 5));
Label labelURL = new Label("Starting URL: ", Label.RIGHT);
panelURL.add(labelURL);
textURL = new TextField("", 40);
panelURL.add(textURL);
panelEntry.add("North", panelURL);
panelMain.add("North", panelEntry);

// list of result URLs
Panel panelListButtons = new Panel();
panelListButtons.setLayout(new BorderLayout(5, 5));

Panel panelList = new Panel();
panelList.setLayout(new BorderLayout(5, 5));
Label labelResults = new Label("Search results");
panelList.add("North", labelResults);

Panel panelListCurrent = new Panel();
panelListCurrent.setLayout(new BorderLayout(5, 5));
listMatches = new java.awt.List(10);
panelListCurrent.add("North", listMatches);
labelStatus = new Label("");
panelListCurrent.add("South", labelStatus);
panelList.add("South", panelListCurrent);
panelListButtons.add("North", panelList);

// control buttons
Panel panelButtons = new Panel();
Button buttonSearch = new Button(SEARCH);
buttonSearch.addActionListener(this);
panelButtons.add(buttonSearch);
Button buttonStop = new Button(STOP);
buttonStop.addActionListener(this);
panelButtons.add(buttonStop);
panelListButtons.add("South", panelButtons);
panelMain.add("South", panelListButtons);
add(panelMain);
setVisible(true);
repaint();

// initialize search data structures
vectorToSearch = new Vector();
vectorSearched = new Vector();
vectorMatches = new Vector();

// set default for URL access

//URLConnection.setDefaultAllowUserInteraction(false);

}
    public void strat(){
    }
    public void stop(){
     if (searchThread != null) {
    setStatus("stopping...");
    searchThread = null;
}
    }
    public void destroy(){
    }
    void setStatus(String status) {
labelStatus.setText(status);
    }
    public void actionPerformed(ActionEvent event) {
String command = event.getActionCommand();

if (command.compareTo(SEARCH) == 0) {
    setStatus("searching...");

    // launch a thread to do the search
    if (searchThread == null) {
searchThread = new Thread(this);
    }
    searchThread.start();
}
else if (command.compareTo(STOP) == 0) {
    stop();
}
    }
    public void run() {
String strURL = textURL.getText();
if (strURL.length() == 0) {
    setStatus("ERROR: must enter a starting URL");
    return;
}

// initialize search data structures
vectorToSearch.removeAllElements();
vectorSearched.removeAllElements();
vectorMatches.removeAllElements();
listMatches.removeAll();

vectorToSearch.addElement(strURL);
while ((vectorToSearch.size() > 0)
  && (Thread.currentThread() == searchThread)) {
    // get the first element from the to be searched list
    strURL = (String) vectorToSearch.elementAt(0);
    setStatus("searching " + strURL);

    URL url;
    try {
url = new URL(/tech-qa-java/strURL/index.html);
    } catch (MalformedURLException e) {
setStatus("ERROR: invalid URL " + strURL);
break;
    }

    // mark the URL as searched (we want this one way or the other)
    vectorToSearch.removeElementAt(0);
    vectorSearched.addElement(strURL);

    // can only search http: protocol URLs
    if (url.getProtocol().compareTo("http") != 0)
break;




    try {
// try opening the URL
URLConnection urlConnection = url.openConnection();

urlConnection.setAllowUserInteraction(false);

InputStream urlStream = url.openStream();

// search the input stream for links
// first, read in the entire URL
byte b[] = new byte[1000];
int numRead = urlStream.read(b);
String content = new String(b, 0, numRead);
while (numRead != -1) {
    if (Thread.currentThread() != searchThread)
break;
    numRead = urlStream.read(b);
    if (numRead != -1) {
String newContent = new String(b, 0, numRead);
content += newContent;
    }
}
urlStream.close();

if (Thread.currentThread() != searchThread)
    break;

String lowerCaseContent = content.toLowerCase();

int index = 0;
while ((index = lowerCaseContent.indexOf("