Question

我正在开发一个非常非常简单的Java浏览器。我已经完成了大部分工作，但是我无法获得“命中输入发送URL”部分。具体来说，当我使用keyTyped（）方法时，我收到此错误：

Browser.java:34: error: ';' expected public void keyTyped(KeyEvent e){ ^ Browser.java:34: error: ';' expected public void keyTyped(KeyEvent e){ ^

我原本以为我在某个地方错过了几个'}'和'{'标签，但是我已经搜索了我的代码，一切似乎都应该是它应该的位置，所以我很难过。

我的代码：

import javax.swing.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.*;
import java.net.*;
import java.io.*;

public class Browser extends JFrame {
    public Browser(){
        setTitle("The next Google Chrome");
        Dimension size = Toolkit.getDefaultToolkit().getScreenSize();
        setSize(600,700);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        add(new BrowserPanel());
        setVisible(true);
    }

public String URL;

class BrowserPanel extends JPanel implements KeyListener{
    public BrowserPanel()
    {
        JTextField field = new JTextField(20);
        field.addKeyListener(this);
        JTextArea area = new JTextArea(30, 50);
        JTextArea dummy = new JTextArea();
        JScrollPane scroll = new JScrollPane(area);
        add(field);
        add(scroll);
        String response;
        String checkTitle = "YA GOOFED.";
        String mainBody = "REAL BAD.";

        @Override
        public void keyTyped(KeyEvent e){
            if(e.getKeyCode() == KeyEvent.VK_ENTER)
            {
                try
                {   
                    URL = field.getText();
                    String ind = "http://";
                    int check = URL.indexOf("http://");
                    int index = ind.length();
                    String sub = URL.substring(index);
                    String filepath = sub.substring(sub.lastIndexOf("/"));
                    String webaddress = URL.substring(index, URL.lastIndexOf("/"));
                    if(check == -1)
                        area.append("This is not a proper URL.\n Please add 'http://' to the beginning of your address and try again.");
                    else
                    {
                        Socket s = new Socket(webaddress, 80);
                        PrintWriter send = new PrintWriter(s.getOutputStream());
                        BufferedReader read = new BufferedReader(new InputStreamReader(s.getInputStream()));
                        send.print("GET " + filepath + " HTTP/1.1\r\n");
                        send.print("Host: " + webaddress + "\r\n");
                        send.print("\r\n");
                        send.flush();
                        while((response = read.readLine())!= null)
                        {
                            dummy.append(response + "\n");
                        }
                        checkTitle = dummy.getText();
                        int title1 = checkTitle.indexOf("<title>");
                        int title2 = checkTitle.indexOf("</title>");
                        int body1 = checkTitle.indexOf("<body class="+"\"innerpage\""+">");
                        int body2 = checkTitle.indexOf("</body>");
                        String preMainBody = checkTitle.substring(body1, body2);
                        String preTitle = checkTitle.substring(title1 , title2);
                        String title = preTitle.substring(7);
                        mainBody = preMainBody.replaceAll("\\<[^>]*>","");
                        area.append(mainBody);
                        setTitle(title);
                        System.out.println(title);
                    }
                }
                catch (IOException i)
                {
                    i.printStackTrace();
                }
            }
        }
    }
}

  public static void main (String[] args){
        new Browser();
    }
}

Answer 1

您实际上是在尝试在构造函数中声明这些方法。

在方法声明开始之前，您需要在某处关闭}。看起来你已经平衡了大括号，所以你也可能需要从类的末尾删除一个。

很难确切知道你的意图，但我怀疑它会在add(scroll)和String response行之间。

使用KeyListener / KeyListener方法标识预期的错误

1 个答案: