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我有2节课。一堂课是给gui的，另一堂课是做一些工作人员的。第二类包括 Swingworker。它搜索一些日志文件并从那里获取一些句子。在 gui 中还有一个标签，Searching.. Please wait..当第二个班级完成工作时，应该将其更改为Searching is finished...

此标签名称searchLabel在第一类中定义。它是私有变量。

我的目的是：第二堂课有done方法。在这个方法里面，我想做searchLabel.setText("blabla");

我怎样才能做到这一点 ？我无法访问。我认为也做公共 JLabel 不是一个解决方案。/* PROBLEM IS IN HERE */通过搜索此字符串，您可以轻松地在代码中找到该部分。

这是代码

这是我的 gui 课：

 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.EventQueue;
 import java.awt.Font;
 import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import javax.swing.JButton;
 import javax.swing.JComboBox;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
 import javax.swing.JTextField;
 import javax.swing.UIManager;
 import javax.swing.UIManager.LookAndFeelInfo;
 import javax.swing.JScrollPane;
 import javax.swing.JTable;
 import javax.swing.SwingConstants;

 public class mainGui extends JFrame {

private JPanel contentPane;
private JTextField userNametextField;
public static JLabel searchLabel,userNameWarningLabel,pathWarningLabel;

/**
 * Launch the application.
 */
public static void main(String[] args) {
    try {
        for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (Exception e) {
        // If Nimbus is not available, you can set the GUI to another look and feel.
    }
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                mainGui frame = new mainGui();
                Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
                int w = frame.getSize().width;
                int h = frame.getSize().height;
                int x = (dim.width-w)/4;
                int y = (dim.height-h)/2;  
                frame.setLocation(x, y);
                frame.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
 }

/**
 * Create the frame.
 */
public mainGui() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 550, 455);
    contentPane = new JPanel();
    getContentPane().setLayout(null);
    setTitle("Role Finding Script");
    //  Border border;

    JLabel lblUsername = new JLabel("   Username  :");
    lblUsername.setFont(new Font("LucidaSans", Font.BOLD, 13));
    lblUsername.setBounds(10, 53, 113, 30);
    //Border border = BorderFactory.createRaisedSoftBevelBorder();
    //  border = BorderFactory.createEtchedBorder();
    //  lblUsername.setBorder(border);
    getContentPane().add(lblUsername);


    userNametextField = new JTextField();
    userNametextField.setBounds(146, 53, 250, 30);
    userNametextField.setFont(new Font("LucidaSans", Font.PLAIN, 13));
    getContentPane().add(userNametextField);
    userNametextField.setColumns(20);

    JLabel lblRole = new JLabel("    Roles        :");
    lblRole.setFont(new Font("LucidaSans", Font.BOLD, 13));
    lblRole.setBounds(10, 124, 113, 30);
    //  border = BorderFactory.createEtchedBorder();
    //  lblRole.setBorder(border);
    getContentPane().add(lblRole);

    JComboBox<String> comboBox = new JComboBox<String>();
    comboBox.setBounds(146, 124, 250, 30);
    comboBox.addItem("VR_ANALYST1");
    comboBox.addItem("VR_ANALYST2");
    comboBox.addItem("VR_ANALYST3");
    comboBox.addItem("VR_ANALYST4");
    comboBox.addItem("VR_ANALYST5");
    comboBox.addItem("VR_ANALYST6");
    comboBox.addItem("VR_ANALYST7");
    comboBox.addItem("VR_ANALYST8");
    comboBox.addItem("VR_ANALYST9");
    comboBox.addItem("VR_ANALYST10");
    comboBox.addItem("VR_ANALYST11");
    comboBox.addItem("VR_ANALYST12");
    comboBox.setMaximumRowCount(6);
    getContentPane().add(comboBox);


    this.searchLabel = new JLabel("Searching.. Please wait..");
    searchLabel.setFont(new Font("LucidaSans", Font.BOLD, 13));
    searchLabel.setBounds(169, 325, 195, 30);
    searchLabel.setVisible(false);
    getContentPane().add(searchLabel);

    JButton btnNewButton = new JButton("Show Me ");
    btnNewButton.setFont(new Font("LucidaSans", Font.BOLD, 13));
    btnNewButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            if(userNametextField.getText() == null || userNametextField.getText().equals("")){
                userNameWarningLabel.setText("Please filled in the Username part.");

            }else{
                searchLabel.setVisible(true);
                VolvoMain task = new VolvoMain();
                task.execute();
            }


        }
    });
    btnNewButton.setBounds(188, 271, 126, 30);
    getContentPane().add(btnNewButton);

    JLabel lblPath = new JLabel("    Path         :");
    lblPath.setFont(new Font("Dialog", Font.BOLD, 13));
    lblPath.setBounds(10, 195, 113, 30);
    getContentPane().add(lblPath);

    userNameWarningLabel = new JLabel("");
    userNameWarningLabel.setBounds(156, 89, 227, 14);
    userNameWarningLabel.setFont(new Font("Dialog", Font.ITALIC, 10));  
    userNameWarningLabel.setForeground(Color.red);
    getContentPane().add(userNameWarningLabel);

    JButton btnNewButton_1 = new JButton("...");
    btnNewButton_1.setBounds(412, 195, 30, 30);
    getContentPane().add(btnNewButton_1);

    JButton btnNewButton_2 = new JButton("+");
    btnNewButton_2.setBounds(460, 195, 44, 30);
    getContentPane().add(btnNewButton_2);

    JLabel headerLabel = new JLabel("Find the Role");
    headerLabel.setFont(new Font("Tahoma", Font.BOLD, 15));
    headerLabel.setHorizontalAlignment(SwingConstants.CENTER);
    headerLabel.setBounds(94, 11, 358, 30);
    headerLabel.setForeground(Color.red);
    getContentPane().add(headerLabel);

    pathWarningLabel = new JLabel("");
    pathWarningLabel.setForeground(Color.RED);
    pathWarningLabel.setFont(new Font("Dialog", Font.ITALIC, 10));
    pathWarningLabel.setBounds(156, 236, 227, 14);
    getContentPane().add(pathWarningLabel);
}
 }

这是另一个类：

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
import javax.swing.SwingWorker;


public class VolvoMain extends SwingWorker{

    private  FileInputStream fstream;
    private  BufferedReader br;
    private  String username = "HALAA";
    private  String role = "VR_ANALYST";
    private  String firstLine = "";
    private  Pattern regex;
    private  List<String> stringList = new ArrayList<String>();
    private  File dir;
    private mainGui mg = new mainGui();

    //String reg = "\\t'AUR +(" + username + ") .*? /ROLE=\"(" + role + ")\".*$";


    @SuppressWarnings("unchecked")
    @Override
    protected Object doInBackground() throws Exception {

        String fmt = "\\t'AUR +(%s) .*? /ROLE=\"(%s)\".*$";
        String reg = String.format(fmt, username, role);

        regex = Pattern.compile(reg);


        dir = new File(
                "C:"+File.separator+"Documents and Settings"+File.separator+"sbx1807"+File.separator+"Desktop"+File.separator
                +"Batu"+File.separator+"Deneme"+File.separator
                );

        File[] dirs = dir.listFiles();

        String[] txtArray = new String[dirs.length];

        int z=0;
        for (File file : dirs) {
            if (file.isDirectory()) {

            }else {
                if(file.getAbsolutePath().endsWith(".log")){
                    txtArray[z] = file.getAbsolutePath();
                    System.out.println(file.getAbsolutePath());
                    z++;
                }
            }

            int j = 0;

            for(int i=0; i<txtArray.length; i++){
                if(txtArray[i] != null && !txtArray[i].equals("")){
                    try{
                        fstream = new FileInputStream(txtArray[i]);
                        br = new BufferedReader(new InputStreamReader(fstream));
                        String strLine;

                        while ((strLine = br.readLine()) != null)   {
                            /* parse strLine to obtain what you want */
                            if((j%2)== 0){
                                firstLine = strLine;
                            }
                            if(((j%2) != 0) && regex.matcher(strLine).matches()){
                                stringList.add(firstLine);
                                stringList.add(strLine);
                            }
                            publish(stringList.size());
                            j++;
                        }
                        publish(stringList.size());
                        br.close();
                    } catch (Exception e) {
                        System.err.println("Error: " + e.getMessage());
                    }
                }
            }
            for(int k=0; k<stringList.size(); k++){
                System.out.println(stringList.get(k));
            }
        }
        return null;
    }

    @Override
    public void done() {
        System.out.println("bitti");
    //  getSearchJLabel().setText("Searching is done..");
    //  mainGui m = new mainGui();
    //  m.searchLabel.setText("done");

    }
}
4

1 回答 1

1

调整您的VolvoMain类，使其JLabel在其构造函数中引用 。将其存储在一个private final字段中，您可以在done()方法中使用它。

public class VolvoMain extends SwingWorker{

    // ...

    private final JLabel labelToUpdate;

    public VolvoMain(JLabel labelToUpdate) {
      this.labelToUpdate = labelToUpdate;
    }

    // ...

    @Override
    public void done() {        
      // Update labelToUpdate here
    }

该done()方法将在 Event Dispatch Thread 上调用，因此直接调整标签文本是安全的。

于 2013-10-25T09:10:23.087 回答