我目前有一个带有 2 个 Jpanel 的简单 Java GUI，即 panel1 和 panel 2。panel1 用于图像显示和标签显示，它可以正常工作。
面板 2 用于在 JTable 中显示数据。我遇到的问题是在没有垂直滚动窗格的情况下显示表格中的所有数据，而不是带有滚动窗格的表格部分。这在 GUI 中造成了一个令人讨厌的差距，我希望通过一次显示所有表数据来纠正它。
我尝试在包含表格的面板、表格本身以及滚动窗格上使用 setPreferedSize，现在我完全不知所措！任何建议都将一如既往地受到赞赏。
import javax.swing.*;
import java.awt.*;
import javax.imageio.*;
import java.io.*;
import java.awt.image.BufferedImage;
import java.util.*;
import javax.swing.table.DefaultTableCellRenderer;
public class GUI2 extends JFrame {
public int PADDING = 10;
public GUI2() {
initUI();
}
public final void initUI() {
// Menu Bar and Menu Items setup
JMenuBar menuBar;
JMenu menu;
JMenuItem menuItem;
menuBar = new JMenuBar();
menu = new JMenu("Menu");
menuBar.add(menu);
JMenuItem menuNew = new JMenuItem("New");
menu.add(menuNew);
JMenuItem menuOpen = new JMenuItem("Open");
menu.add(menuOpen);
JMenuItem menuSave = new JMenuItem("Save");
menu.add(menuSave);
JMenuItem menuExit = new JMenuItem("Exit");
menu.add(menuExit);
setLayout(new GridLayout(4,1));
setJMenuBar(menuBar);
JPanel jp1 = new JPanel(new BorderLayout());
jp1.setBorder(BorderFactory.createEmptyBorder(PADDING, PADDING, PADDING, PADDING));
jp1.setBorder(BorderFactory.createLineBorder(Color.black));
jp1.setPreferredSize(new Dimension(800, 300));
// Create subpanels
JPanel sp1 = new JPanel();
JPanel sp2 = new JPanel(new GridLayout(8, 2));
sp1.setBorder(BorderFactory.createLineBorder(Color.black));
// Set up sub panel 1
BufferedImage myPicture = null;
try{
myPicture = ImageIO.read(new File("bat.jpg"));
}catch(IOException e){
System.out.println("Image not Loaded!");
e.printStackTrace();
}
JLabel picLabel = new JLabel(new ImageIcon( myPicture ));
jp1.add(picLabel);
// For sub panel 2
JLabel label_location = new JLabel("Location: ");
JLabel label_datetime = new JLabel("Date & Time: ");
JLabel label_measurementNum = new JLabel("Measurement Number: ");
JLabel label_vehicleType = new JLabel("Vehicle Type: ");
JLabel label_temperature = new JLabel("Temperature: ");
JLabel label_weather = new JLabel("Weather Conditions: ");
JLabel label_testPersons = new JLabel("Test Persons: ");
JLabel label_testType = new JLabel("Test Type: ");
String timestamp = " ";
Date date = new Date();
timestamp = date.toString();
JTextField location = new JTextField();
JLabel datetime = new JLabel(timestamp);
JLabel measurementNum = new JLabel("AZUWADA87623Q");
JLabel vehicleType = new JLabel("Batmobile");
JTextField temperature = new JTextField();
JTextField weather = new JTextField();
JTextField testPersons = new JTextField();
JTextField testType = new JTextField();
sp1.add(picLabel);
sp2.add(label_location);
sp2.add(location);
sp2.add(label_datetime);
sp2.add(datetime);
sp2.add(label_measurementNum);
sp2.add(measurementNum);
sp2.add(label_vehicleType);
sp2.add(vehicleType);
sp2.add(label_temperature);
sp2.add(temperature);
sp2.add(label_weather);
sp2.add(weather);
sp2.add(label_testPersons);
sp2.add(testPersons);
sp2.add(label_testType);
sp2.add(testType);
label_location.setHorizontalAlignment(SwingConstants.LEFT);
jp1.add(sp1, BorderLayout.WEST);
jp1.add(sp2, BorderLayout.EAST);
add(jp1);
JPanel jp2 = new JPanel();
jp2.setPreferredSize(new Dimension(900, 900));
String[] columnNames = {"", "DAW Referernce Scale", " WIM Vehicle 1"};
Object[][] data = { {"Vehicle Summary", new Integer(100), new Integer(200)}, // Header 1: Green
{"Axle Numbers", new Integer(100), new Integer(200)},
{"Axle Code", new Integer(100), new Integer(200)},
{"Axle Distances (cm)", new Integer(100), new Integer(200)},
{"Vehicle Speed (km/h)", new Integer(100), new Integer(200)},
{"Gross Weight", new Integer(100), new Integer(200)},
{"Axle Weight 1", new Integer(100), new Integer(200)},
{"Axle Weight 2", new Integer(100), new Integer(200)},
// Measurements for Axle 1
// Weights
{"Axle 1", new Integer(100), new Integer(200)}, // Header 1: Green
{"Weights (kg)", " ", " "},
{"Axle Weights AW1", new Integer(100), new Integer(200)},
{"Wheel Weights WW1R", new Integer(100), new Integer(200)},
{"Wheel Weights WW1L", new Integer(100), new Integer(200)},
// Dimensions
{"Dimensions (cm or cm2)", new Integer(100), new Integer(200)},
{"Axle Width AW1", new Integer(100), new Integer(200), new Integer(200)},
{"Tire Footprints 1R Length", new Integer(100), new Integer(200)},
{"Tire Footprints 1R Width", new Integer(100), new Integer(200)},
{"Tire Footprints 1R FootPrint", new Integer(100), new Integer(200)},
{"Tire Footprints 1L Length", new Integer(100), new Integer(200)},
{"Tire Footprints 1L Width", new Integer(100), new Integer(200)},
{"Tire Footprints 1L FootPrint", new Integer(100), new Integer(200)},
// Speed
{"Speed", " ", " "},
{"Vehicle Speed", new Integer(100), new Integer(200)},
{"Axle Speed", new Integer(100), new Integer(200)},
{"Tyre Speed 1R", new Integer(100), new Integer(200)},
{"Tyre Speed 1L", new Integer(100), new Integer(200)},
// Measurements for Axle 2
// Weights
{"Axle 2", " ", " "}, // Header 1: Green
{"Weights (kg)", " ", " "},
{"Axle Weights AW2", new Integer(100), new Integer(200)},
{"Wheel Weights WW2R", new Integer(100), new Integer(200)},
{"Wheel Weights WW2L", new Integer(100), new Integer(200)},
// Dimensions
{"Dimensions (cm or cm2)", " ", " "},
{"Axle Width AW2", new Integer(100), new Integer(200)},
{"Tire Footprints 2R Length", new Integer(100), new Integer(200)},
{"Tire Footprints 2R Width", new Integer(100), new Integer(200)},
{"Tire Footprints 2R FootPrint", new Integer(100), new Integer(200)},
{"Tire Footprints 2L Length", new Integer(100), new Integer(200)},
{"Tire Footprints 2L Width", new Integer(100), new Integer(200)},
{"Tire Footprints 2L FootPrint", new Integer(100), new Integer(200)},
// Speed
{"Speed", " ", " "},
{"Vehicle Speed", new Integer(100), new Integer(200)},
{"Axle Speed", new Integer(100), new Integer(200)},
{"Tyre Speed 2R", new Integer(100), new Integer(200)},
{"Tyre Speed 2L", new Integer(100), new Integer(200)},};
final JTable table = new JTable(data, columnNames);
table.getColumnModel().getColumn(0).setCellRenderer(new CustomRenderer());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
JScrollPane scrollPane = new JScrollPane(table);
jp2.add(scrollPane);
add(scrollPane);
setSize(400,300);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
}
//Custom Renderer - does the default rendering except if told the row should be a different color
public static class CustomRenderer extends DefaultTableCellRenderer{
public CustomRenderer(){
super();
//Customize the rendering however you want
setBackground(UIManager.getColor("TableHeader.background"));
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (Exception e) {
e.printStackTrace();
}
GUI2 ex = new GUI2();
ex.setVisible(true);
}
});
}
}