您可以选择使用
LayoutManager符合单元格首选大小的。GridLayout会为每个单元提供相等数量的可用空间，这似乎并不是您想要的。
例如，类似 GridBagLayout
public class TestChessBoard { public static void main(String[] args) { new TestChessBoard(); } public TestChessBoard() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception ex) { } Jframe frame = new Jframe("Test"); frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); frame.add(new ChessBoardPane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class ChessBoardPane extends JPanel { public ChessBoardPane() { int index = 0; setLayout(new GridBagLayout()); GridBagConstraints gbc = new GridBagConstraints(); for (int row = 0; row < 8; row++) { for (int col = 0; col < 8; col++) { Color color = index % 2 == 0 ? Color.BLACK : Color.WHITE; gbc.gridx = col; gbc.gridy = row; add(new Cell(color), gbc); index++; } index++; } } } public class Cell extends JButton { public Cell(Color background) { setContentAreaFilled(false); setBorderPainted(false); setBackground(background); setOpaque(true); } @Override public Dimension getPreferredSize() { return new Dimension(25, 25); } }}更新了比例示例
现在，如果您要按比例进行布局（以便网格的每个单元都与另一个单元保持比例，而不管可用空间如何），事情就会
开始变得……有趣……
public class TestChessBoard { public static void main(String[] args) { new TestChessBoard(); } public TestChessBoard() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception ex) { } Jframe frame = new Jframe("Test"); frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); frame.add(new TestChessBoard.ChessBoardPane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class ChessBoardPane extends JPanel { public ChessBoardPane() { int index = 0; setLayout(new ChessBoardLayoutManager()); for (int row = 0; row < 8; row++) { for (int col = 0; col < 8; col++) { Color color = index % 2 == 0 ? Color.BLACK : Color.WHITE; add(new TestChessBoard.Cell(color), new Point(col, row)); index++; } index++; } } } public class Cell extends JButton { public Cell(Color background) { setContentAreaFilled(false); setBorderPainted(false); setBackground(background); setOpaque(true); } @Override public Dimension getPreferredSize() { return new Dimension(25, 25); } } public class ChessBoardLayoutManager implements LayoutManager2 { private Map<Point, Component> mapComps; public ChessBoardLayoutManager() { mapComps = new HashMap<>(25); } @Override public void addLayoutComponent(Component comp, Object constraints) { if (constraints instanceof Point) { mapComps.put((Point) constraints, comp); } else { throw new IllegalArgumentException("ChessBoard constraints must be a Point"); } } @Override public Dimension maximumLayoutSize(Container target) { return preferredLayoutSize(target); } @Override public float getLayoutAlignmentX(Container target) { return 0.5f; } @Override public float getLayoutAlignmentY(Container target) { return 0.5f; } @Override public void invalidateLayout(Container target) { } @Override public void addLayoutComponent(String name, Component comp) { } @Override public void removeLayoutComponent(Component comp) { Point[] keys = mapComps.keySet().toArray(new Point[mapComps.size()]); for (Point p : keys) { if (mapComps.get(p).equals(comp)) { mapComps.remove(p); break; } } } @Override public Dimension preferredLayoutSize(Container parent) { return new CellGrid(mapComps).getPreferredSize(); } @Override public Dimension minimumLayoutSize(Container parent) { return preferredLayoutSize(parent); } @Override public void layoutContainer(Container parent) { int width = parent.getWidth(); int height = parent.getHeight(); int gridSize = Math.min(width, height); CellGrid grid = new CellGrid(mapComps); int rowCount = grid.getRowCount(); int columnCount = grid.getColumnCount(); int cellSize = gridSize / Math.max(rowCount, columnCount); int xOffset = (width - (cellSize * columnCount)) / 2; int yOffset = (height - (cellSize * rowCount)) / 2; Map<Integer, List<CellGrid.Cell>> cellRows = grid.getCellRows(); for (Integer row : cellRows.keySet()) { List<CellGrid.Cell> rows = cellRows.get(row); for (CellGrid.Cell cell : rows) { Point p = cell.getPoint(); Component comp = cell.getComponent(); int x = xOffset + (p.x * cellSize); int y = yOffset + (p.y * cellSize); comp.setLocation(x, y); comp.setSize(cellSize, cellSize); } } } public class CellGrid { private Dimension prefSize; private int cellWidth; private int cellHeight; private Map<Integer, List<Cell>> mapRows; private Map<Integer, List<Cell>> mapCols; public CellGrid(Map<Point, Component> mapComps) { mapRows = new HashMap<>(25); mapCols = new HashMap<>(25); for (Point p : mapComps.keySet()) { int row = p.y; int col = p.x; List<Cell> rows = mapRows.get(row); List<Cell> cols = mapCols.get(col); if (rows == null) { rows = new ArrayList<>(25); mapRows.put(row, rows); } if (cols == null) { cols = new ArrayList<>(25); mapCols.put(col, cols); } Cell cell = new Cell(p, mapComps.get(p)); rows.add(cell); cols.add(cell); } int rowCount = mapRows.size(); int colCount = mapCols.size(); cellWidth = 0; cellHeight = 0; for (List<Cell> comps : mapRows.values()) { for (Cell cell : comps) { Component comp = cell.getComponent(); cellWidth = Math.max(cellWidth, comp.getPreferredSize().width); cellHeight = Math.max(cellHeight, comp.getPreferredSize().height); } } int cellSize = Math.max(cellHeight, cellWidth); prefSize = new Dimension(cellSize * colCount, cellSize * rowCount); System.out.println(prefSize); } public int getRowCount() { return getCellRows().size(); } public int getColumnCount() { return getCellColumns().size(); } public Map<Integer, List<Cell>> getCellColumns() { return mapCols; } public Map<Integer, List<Cell>> getCellRows() { return mapRows; } public Dimension getPreferredSize() { return prefSize; } public int getCellHeight() { return cellHeight; } public int getCellWidth() { return cellWidth; } public class Cell { private Point point; private Component component; public Cell(Point p, Component comp) { this.point = p; this.component = comp; } public Point getPoint() { return point; } public Component getComponent() { return component; } } } }}
