JTable 单元格中的图像相差一个像素？

Question

因此，我现在可以将图像加载到 JTable 的单元格中，但由于某种原因，图形全部向右移动了一个像素，使我能够看到 JTable 的背景。有什么想法吗？抱歉，如果我的格式已关闭；仍然没有完全习惯这种标记。

public static void main(String[] args) {  

  final int rows = 16;  
  final int columns = 16;  
  final int dimTile = 32;

  JFrame frame = new JFrame("test");  
  JTable table = new JTable(rows, columns);  
  table.setIntercellSpacing(new Dimension(0, 0));  
  table.setShowGrid(false);
  table.setBackground(Color.cyan);  
  table.setTableHeader(null);  
  table.setRowHeight(dimTile);  
  table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);  
  table.setPreferredSize(new Dimension(rows * dimTile, columns * dimTile));  

  Tile tile = new Tile(0);  
  for(int i = 0; i < rows; i++) {  
     for(int j = 0; j < columns; j++) {  
        table.getColumnModel().getColumn(j).setCellRenderer(new MyRenderer());  
        table.setValueAy(tile, i, j);  
     }  
  }  

  JScrollPane scrollPane = new JScrollPane(table, ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);  
scrollPane.setBorder(BorderFactory.createEmptyBorder());  

  frame.getContentPane().add(scrollPane);  
  frame.setSize(512, 512);  
  frame.setVisible(true);  
  int adjustedSizeX = frame.getInsets().left + frame.getInsets().right + 512;  
  int adjustedSizeY = frame.getInsets().top + frame.getInsets().bottom + 512;  
  frame.setSize(adjustedSizeX, adjustedSizeY);  
  frame.pack();  

  ...  
}  


public class MyRenderer extends DefaultTableCellRenderer {  
  @Override  
  public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {  
     super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);  

      Tile tile = (Tile) value;  
      setIcon(tile.getIcon());  
      return this;  
   }  
}  


public class Tile {  
  ImageIcon icon;  

  public Tile(int graphic) {  
     icon = new ImageIcon(PATH/TO/"...test.png");  
  }  

  public ImageIcon getIcon() {  
     return icon;  
  }  
}  

Answer 1

不完全确定“关闭一个像素”是什么意思 - 但要在没有任何视觉伪影的情况下实现零单元格间距，您必须将边距归零并关闭网格线：

table.setIntercellSpacing(new Dimension(0, 0)); 
table.setShowGrid(false)

编辑

好吧，仔细观察，有您的代码有几个问题，

• 您间接而不是直接调整列大小（还有另一个很好的例子，为什么永远不要执行组件。setPreferredSize :-）
• 渲染器的边框需要一些大小

来修复第一个，配置每个列的宽度，表格布局将自动

    final int rows = 16;
    final int columns = 16;
    Tile tile = new Tile(0);
    int tileHeight = tile.getIcon().getIconHeight();
    int tileWidth = tile.getIcon().getIconWidth();

    JTable table = new JTable(rows, columns);
    // remove all margin
    table.setIntercellSpacing(new Dimension(0, 0));
    table.setShowGrid(false);
    table.setTableHeader(null);
    // set the rowHeight
    table.setRowHeight(tileHeight);
    // turn off auto-resize
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    // configure each column with renderer and prefWidth
    for (int j = 0; j < columns; j++) {
        TableColumn column = table.getColumnModel().getColumn(j);
        column.setCellRenderer(new MyRenderer());
        column.setPreferredWidth(tileWidth);
    }

为第二次配置其自身，在每次调用中将边框设置为空：

public static class MyRenderer extends DefaultTableCellRenderer {
    @Override
    public Component getTableCellRendererComponent(JTable table,
            Object value, boolean isSelected, boolean hasFocus, int row,
            int column) {
        super.getTableCellRendererComponent(table, value, isSelected,
                hasFocus, row, column);
        setBorder(null);
        Tile tile = (Tile) value;
        setIcon(tile.getIcon());
        return this;
    }
}