没有简单的方法为整个JTable 设置背景，但是JViewPort 来自JScrollPane 可以轻松做到这一点，那么不管是在JScrollPane 内部还是JTable 或另一个@987654324 @
例如
import java.awt.*;
import javax.swing.*;
class ImageAsTableBackround {
private JScrollPane sp;
private JTable table;
private String[] head = {"One", "Two", "Three", "Four", "Five", "Six"};
private String[][] data = new String[25][6];
public void buildGUI() {
sp = new JScrollPane();
// uncomment these codes lines for panting an image from package,
// but then block code table = new TableBackroundPaint0(data, head);
//sp.setViewport(new ImageViewport());
//table = new JTable(data, head);
//table.setOpaque(false);
// code for painting from generated code
table = new TableBackroundPaint0(data, head);
table.setBackground(new Color(0, 0, 0, 0));
table.setFillsViewportHeight(true);
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
sp.setViewportView(table);
JFrame frame = new JFrame();
frame.getContentPane().add(sp);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
class ImageViewport extends JViewport {
private static final long serialVersionUID = 1L;
private Image img;
public ImageViewport() {
try {
ImageIcon image = new ImageIcon(getClass().getResource("resources/PICT6090.jpg"));
img = image.getImage();
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
if (img != null) {
g.drawImage(img, 0, 0, this.getWidth(), this.getHeight(), this);
} else {
g.drawString("This space for rent", 50, 50);
}
}
}
class TableBackroundPaint0 extends JTable {
private static final long serialVersionUID = 1L;
TableBackroundPaint0(Object[][] data, Object[] head) {
super(data, head);
setOpaque(false);
((JComponent) getDefaultRenderer(Object.class)).setOpaque(false);
}
@Override
public void paintComponent(Graphics g) {
Color background = new Color(168, 210, 241);
Color controlColor = new Color(230, 240, 230);
int width = getWidth();
int height = getHeight();
Graphics2D g2 = (Graphics2D) g;
Paint oldPaint = g2.getPaint();
g2.setPaint(new GradientPaint(0, 0, background, width, 0, controlColor));
g2.fillRect(0, 0, width, height);
g2.setPaint(oldPaint);
for (int row : getSelectedRows()) {
Rectangle start = getCellRect(row, 0, true);
Rectangle end = getCellRect(row, getColumnCount() - 1, true);
g2.setPaint(new GradientPaint(start.x, 0, controlColor, (int) ((end.x + end.width - start.x) * 1.25), 0, Color.orange));
g2.fillRect(start.x, start.y, end.x + end.width - start.x, start.height);
}
super.paintComponent(g);
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new ImageAsTableBackround().buildGUI();
}
});
}
}