JTextArea ArrayList字符串数据与JTextField输入数据不匹配

时间：2014-04-25 05:20:52

标签： java swing arraylist awt

所以我试图让我的程序读取txt文件中的行列表。然后将其显示在JTextArea中。用户可以使用JTextField输入数据，如果用户匹配JArea中的文本并且“错误！”，则目标是显示“Hooray”。如果他们不这样做。任何帮助表示赞赏。

public class TextArea1 {

    JTextArea text;
    JFrame frame;
    JTextField textField;
    public int k;
    public ArrayList aList;
    public String correctAnswer;

    public static void main(String[] args) {
        TextArea1 gui = new TextArea1();

        gui.go();
    }

    private String textLine;

    public void go() {
        frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel panel = new JPanel();
        textField = new JTextField("");
        textField.addActionListener(new startTextFieldListener("correct answer"));
        JButton startButton = new JButton("Start!");
        startButton.addActionListener(new startButtonListener(aList));


        text = new JTextArea(30, 60);
        text.setLineWrap(true);

        JScrollPane scroller = new JScrollPane(text);
        scroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        scroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);

        panel.add(scroller);

        frame.getContentPane().add(BorderLayout.CENTER, panel);
        frame.getContentPane().add(BorderLayout.WEST, startButton);
        frame.getContentPane().add(BorderLayout.SOUTH, textField);
        frame.setSize(350, 300);
        frame.setVisible(true);
    }


    class startButtonListener implements ActionListener {
        ArrayList aList;

        startButtonListener(ArrayList passedInList) {
            aList = passedInList;
        }

        @Override
        public void actionPerformed(ActionEvent event) {
            String fileName = "test.txt";
            String line;
            ArrayList aList = new ArrayList();

            try {
                try (BufferedReader input = new BufferedReader(new FileReader(fileName))) {
                    if (!input.ready()) {
                        throw new IOException();

                    }

                    while ((line = input.readLine()) != null) {
                        aList.add(line);
                    }
                }
            } catch (IOException e) {
                System.out.println(e);

            }

            int sz = aList.size();

            for (int k = 0; k < sz; k++) {

                String correctAnswer = aList.get(k).toString();

                text.append(aList.get(k).toString());
                text.append("\n");
            }
        }
    }

    class startTextFieldListener implements ActionListener {
        String correctAnswer;

        startTextFieldListener(String answer) {
            correctAnswer = answer;
        }

        @Override
        public void actionPerformed(ActionEvent event) {
            if (text.getText().equals(correctAnswer)) {
                JOptionPane.showMessageDialog(null, "Hooray!");
            } else {
                JOptionPane.showMessageDialog(null, "Wrong!");
            }

        }
    }
}

3 个答案:

答案 0 :(得分：0)

每次附加到textArea时都添加了一个新行的小错误..为什么它不会因为额外的新行而进行比较

如果你的文件中有新行没有问题，那么当你解析文件时，arrayList已经有了它，所以不需要添加新行。

<强>溶液 

public class TextArea1{

JTextArea text;
JFrame frame;
JTextField textField;
public int k;
public String correctAnswer;

public static void main (String [] args) {
    TextArea1 gui = new TextArea1();

    gui.go();
}
private String textLine;

public void go() {
    frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel panel = new JPanel();
    textField = new JTextField("");
    //textField.addActionListener(new startTextFieldListener("correct answer"));
    JButton startButton  = new JButton ("Start!");
    startButton.addActionListener(new startButtonListener());


    text = new JTextArea (30, 60);
    text.setLineWrap(true);

    JScrollPane scroller = new JScrollPane(text);
    scroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
    scroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);

    panel.add(scroller);

    frame.getContentPane().add(BorderLayout.CENTER, panel);
    frame.getContentPane().add(BorderLayout.WEST, startButton);
    frame.getContentPane().add(BorderLayout.SOUTH, textField);      
    frame.setSize(350, 300);
    frame.setVisible(true);
}       



class startButtonListener implements ActionListener {
 ArrayList aList;
 startButtonListener()
 {

 }

public void actionPerformed(ActionEvent event) {
     String fileName = "test.txt";
    String line;
    String string = "";

    try {
         try (BufferedReader input = new BufferedReader (new FileReader(fileName))) {
             if (!input.ready())   {
                 throw new IOException();

             }

             while ((line = input.readLine()) !=null) {
                 string += line;
                 //aList.add(line);
             }
             System.out.println("List ready to check. values in list are :"+aList);
         }
    } catch (IOException e) {
        System.out.println(e);

    }
        if (string.equals(textField.getText())) {

            JOptionPane.showMessageDialog(null, "Hooray!");
         }

         else {
            JOptionPane.showMessageDialog(null, "Wrong!");
         }          
    }
}       
}

答案 1 :(得分：0)

好吧，我刚刚修改了你的代码，以便在列表中包含值时获得正确的消息。相应地查看和修改。

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;

public class TextArea1{

JTextArea text;
JFrame frame;
JTextField textField;
public int k;
public String correctAnswer;

public static void main (String [] args) {
    TextArea1 gui = new TextArea1();

    gui.go();
}
private String textLine;

public void go() {
    frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel panel = new JPanel();
    textField = new JTextField("");
    //textField.addActionListener(new startTextFieldListener("correct answer"));
    JButton startButton  = new JButton ("Start!");
    startButton.addActionListener(new startButtonListener());


    text = new JTextArea (30, 60);
    text.setLineWrap(true);

    JScrollPane scroller = new JScrollPane(text);
    scroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
    scroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);

    panel.add(scroller);

    frame.getContentPane().add(BorderLayout.CENTER, panel);
    frame.getContentPane().add(BorderLayout.WEST, startButton);
    frame.getContentPane().add(BorderLayout.SOUTH, textField);      
    frame.setSize(350, 300);
    frame.setVisible(true);
}       



class startButtonListener implements ActionListener {
 ArrayList aList;
 startButtonListener()
 {

 }

public void actionPerformed(ActionEvent event) {
     String fileName = "test.txt";
    String line;
    ArrayList aList = new ArrayList();

    try {
         try (BufferedReader input = new BufferedReader (new FileReader(fileName))) {
             if (!input.ready())   {
                 throw new IOException();

             }

             while ((line = input.readLine()) !=null) {
                 aList.add(line);
             }
             System.out.println("List ready to check. values in list are :"+aList);
         }
    } catch (IOException e) {
        System.out.println(e);

    }
        if (aList.contains(text.getText())) {
            JOptionPane.showMessageDialog(null, "Hooray!");
         }

         else {
            JOptionPane.showMessageDialog(null, "Wrong!");
         }          
    }
}       
}

如果这是正确的，则将其标记为正确。

答案 2 :(得分：0)

好的尝试一下：

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;

public class TextArea1{
    JTextArea text;
    JFrame frame;
    JTextField textField;
    public int k;
    public ArrayList aList;
    public String correctAnswer;

    public static void main (String [] args) {
        TextArea1 gui = new TextArea1();

        gui.go();
    }
    private String textLine;

    public void go() {
        frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel panel = new JPanel();
        textField = new JTextField("");
        JButton startButton  = new JButton ("Start!");
        startButton.addActionListener(new startButtonListener());


        text = new JTextArea (30, 60);
        text.setLineWrap(true);

        JScrollPane scroller = new JScrollPane(text);
        scroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        scroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);

        panel.add(scroller);

        frame.getContentPane().add(BorderLayout.CENTER, panel);
        frame.getContentPane().add(BorderLayout.WEST, startButton);
        frame.getContentPane().add(BorderLayout.SOUTH, textField);      
        frame.setSize(350, 300);
        frame.setVisible(true);
    }       

    class startButtonListener implements ActionListener {
     ArrayList aList;
        public void actionPerformed(ActionEvent event) {
            String fileName = "test.txt";
            String line;
            ArrayList <String>aList = new ArrayList<>();

            try {
                 try (BufferedReader input = new BufferedReader (new FileReader(fileName))) {
                     if (!input.ready())   {
                         throw new IOException();

                     }

                     while ((line = input.readLine()) !=null) {
                         aList.add(line);
                     }
                }
            } catch (IOException e) {
                System.out.println(e);

            }
            int sz = aList.size();
            boolean result=false;
            for(String t:aList){ 
            if (t.equalsIgnoreCase(textField.getText())) {
                    JOptionPane.showMessageDialog(null, "Hooray! Loading File contents....");
                    int count=0;
                    for (int k = 0; k< sz; k++) {          
                        text.append(aList.get(k).toString());
                        System.out.println(count);
                        count++;
                        // if(k<sz-1)
                        //  text.append(", ");
                        text.append("\n");
                    }
                    result=true;
                    break;
                 }

                 else {
                    result=false;
                 }
            }
            if(!result){
                JOptionPane.showMessageDialog(null, "Wrong!");
            }
        }
    }       
}

在此，它将在textfield中查找文本输入，如果匹配，则会逐行添加整个文件内容。我已经测试过了。但请记住我没有足够的时间，所以我没有进行正则表达式模式匹配，它与文本文件中的一行简单相等，文本框中输入的文字完全正确。

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