本文介紹了如何從txt文件中讀取單獨的部分以在Java圖形用戶界面中顯示？的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學習吧！
問題描述
因此here like this picture我需要在txt文件中顯示我擁有的票證的統計信息。我在我的文件中使用"；，"；分隔了4個字段，但我不知道如何在圖形用戶界面中分別顯示它們，即，對于Ticket Price下的4個字段，我需要顯示價格，這是我的txt文件中每行的第二部分，對于票據金額，我需要顯示文件中每行的第三部分。那么我該怎么向他們展示呢？我已經設置了一個演示它應該是什么樣子，對于圖片中的每一種類型，我需要為txt文件中的每一種類型顯示類似的線條。因此，基本上我需要顯示From&Quot；VIP-AC，30$，66，30/10/2020&Quot；tothis，以此類推(對于下一行)
這是我到目前為止的代碼：
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSeparator;
import javax.swing.border.EmptyBorder;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import java.awt.Color;
public class TicketStats extends JFrame {
private JPanel contentPane;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
TicketStats frame = new TicketStats();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public TicketStats() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 1016, 566);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
JButton backButton = new JButton("Back");
backButton.setBounds(846, 11, 144, 54);
backButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
dispose();
User user = new User();
user.setVisible(true);
}
});
contentPane.setLayout(null);
backButton.setFont(new Font("Tahoma", Font.PLAIN, 16));
contentPane.add(backButton);
JLabel lblNewLabel = new JLabel("Ticket Info");
lblNewLabel.setFont(new Font("Tahoma", Font.BOLD, 36));
lblNewLabel.setBounds(385, 66, 227, 44);
contentPane.add(lblNewLabel);
JLabel lblNewLabel_1 = new JLabel("Ticket Type");
lblNewLabel_1.setFont(new Font("Tahoma", Font.PLAIN, 16));
lblNewLabel_1.setBounds(183, 164, 108, 25);
contentPane.add(lblNewLabel_1);
JLabel lblNewLabel_2 = new JLabel("Ticket Price");
lblNewLabel_2.setFont(new Font("Tahoma", Font.PLAIN, 16));
lblNewLabel_2.setBounds(358, 164, 108, 25);
contentPane.add(lblNewLabel_2);
JLabel lblNewLabel_3 = new JLabel("Tickets Left");
lblNewLabel_3.setFont(new Font("Tahoma", Font.PLAIN, 16));
lblNewLabel_3.setBounds(535, 164, 108, 25);
contentPane.add(lblNewLabel_3);
JLabel lblNewLabel_4 = new JLabel("Match Date");
lblNewLabel_4.setFont(new Font("Tahoma", Font.PLAIN, 16));
lblNewLabel_4.setBounds(699, 164, 108, 25);
contentPane.add(lblNewLabel_4);
JLabel lblNewLabel_5 = new JLabel("VIP-AC");
lblNewLabel_5.setFont(new Font("Tahoma", Font.PLAIN, 12));
lblNewLabel_5.setBounds(183, 228, 76, 14);
contentPane.add(lblNewLabel_5);
JLabel lblNewLabel_6 = new JLabel("30$");
lblNewLabel_6.setFont(new Font("Tahoma", Font.PLAIN, 12));
lblNewLabel_6.setBounds(358, 228, 76, 14);
contentPane.add(lblNewLabel_6);
JLabel lblNewLabel_7 = new JLabel("66");
lblNewLabel_7.setFont(new Font("Tahoma", Font.PLAIN, 12));
lblNewLabel_7.setBounds(535, 228, 82, 14);
contentPane.add(lblNewLabel_7);
JLabel lblNewLabel_8 = new JLabel("30/10/2020");
lblNewLabel_8.setBounds(699, 228, 76, 14);
contentPane.add(lblNewLabel_8);
File file = new File("Ticket.txt");
try(BufferedReader reader = new BufferedReader(new FileReader(file))) {
StringBuilder sb = new StringBuilder();
String text;
while((text = reader.readLine()) != null) {
sb.append(text).append(", ");
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
JSeparator separator = new JSeparator();
separator.setBounds(172, 201, 621, 2);
contentPane.add(separator);
JSeparator separator1 = new JSeparator();
separator1.setForeground(Color.BLACK);
separator1.setOrientation(SwingConstants.VERTICAL);
separator1.setBounds(664, 164, 2, 283);
contentPane.add(separator1);
JSeparator separator_1 = new JSeparator();
separator_1.setOrientation(SwingConstants.VERTICAL);
separator_1.setForeground(Color.BLACK);
separator_1.setBounds(487, 164, 2, 283);
contentPane.add(separator_1);
JSeparator separator_2 = new JSeparator();
separator_2.setOrientation(SwingConstants.VERTICAL);
separator_2.setForeground(Color.BLACK);
separator_2.setBounds(314, 164, 2, 283);
contentPane.add(separator_2);
}
}
推薦答案
讀取分隔文本文件中的數據并在JTable中顯示數據的基本示例如下：
import java.awt.*;
import java.io.*;
import javax.swing.*;
import javax.swing.table.*;
public class TableFromFile extends JPanel
{
public TableFromFile()
{
setLayout( new BorderLayout() );
JTable table = new JTable( getTableModel() );
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane( table );
add( scrollPane );
}
private TableModel getTableModel()
{
String delimiter = ":";
DefaultTableModel model = new DefaultTableModel();
try
{
BufferedReader reader = getFileReader();
// First line will contain the column names
String line = reader.readLine();
model.setColumnIdentifiers( line.split(delimiter) );
// Remaining lines in the file will be the data
while ((line = reader.readLine()) != null)
{
model.addRow( line.split(delimiter) );
}
reader.close();
}
catch(Exception e) { System.out.println(e); }
return model;
}
private BufferedReader getFileReader()
{
// Create data to simulate reading data from a file
String data =
"Letter:Number
" +
"A:1
" +
"B:2
" +
"C:3";
BufferedReader reader = new BufferedReader( new StringReader( data ) );
// In your real application the data would come from a file
//Reader reader = new BufferedReader( new FileReader(...) );
return reader;
}
private static void createAndShowUI()
{
JFrame frame = new JFrame("Table From File");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add( new TableFromFile() );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowUI();
}
});
}
}
上面的示例使用"；："；作為文件中字符串的單字符分隔符。
由于您使用兩個字符作為分隔符，因此需要使用稍微復雜一些的正則表達式來進行拆分。因此，您的拆分語句應該是：
model.addRow( line.split(":\s") );
這篇關于如何從txt文件中讀取單獨的部分以在Java圖形用戶界面中顯示？的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，
