0

我希望能够突出显示 的某些行JTable，具体取决于行本身的值。例如，如果现有 qty < reorder level，则该行应在JTable.

我知道有一种表格方法tblItems.setSelectionBackground(Color.yellow);可以在选择行时起作用，但是是否有类似的方法不依赖于选择的行以使它们以不同的颜色显示？

public class MyTableCellRenderer implements TableCellRenderer {  
    @Override  
    public Component getTableCellRendererComponent
(JTable table, Object value, 
boolean isSelected, boolean hasFocus, int row, int column) {

        Object ob=table.getValueAt(row, column);
        if(ob.toString().equals("yes")){
            //need to colour the entire row
        }
        return 
    }

}
4

3 回答 3

2

您可以使用我的答案来更改单元格的颜色。可以使用相同的技术将其应用于行中的每个单元格。

这也是一个例子prepareRenderer

import javax.swing.*;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellRenderer;
import java.awt.*;

public class TableWithPrepareRendererExample extends JFrame {
  ColorName colors[] = { new ColorName("Red"), new ColorName("Green"), new ColorName("Blue"),
    new ColorName("Black"), new ColorName("White") };

  public TableWithPrepareRendererExample() {
    super("Table With prepareRenderer Example");
    setSize(500, 300);
    setDefaultCloseOperation(EXIT_ON_CLOSE);

    JTable table = new JTable(new AbstractTableModel() {
      ColorName data[] = { colors[0], colors[1], colors[2], colors[3], colors[4], colors[0],
        colors[1], colors[2], colors[3], colors[4] };


      public int getColumnCount() {
        return 3;
      }

      public int getRowCount() {
        return 10;
      }

      public Object getValueAt(int r, int c) {
        switch (c) {
          case 0:
            return (r + 1) + ".";
          case 1:
            return "Some pithy quote #" + r;
          case 2:
            return data[r];
        }
        return "Bad Column";
      }

      public Class getColumnClass(int c) {
        if (c == 2)
          return ColorName.class;
        return String.class;
      }

      public boolean isCellEditable(int r, int c) {
        return c == 2;
      }

      public void setValueAt(Object value, int r, int c) {
        data[r] = (ColorName) value;
      }

    }) {
      public Component prepareRenderer(TableCellRenderer renderer,
                                       int rowIndex, int vColIndex) {
        Component c = super.prepareRenderer(renderer, rowIndex, vColIndex);
        Object value = getValueAt(rowIndex, vColIndex);
        if (value.toString().equals("Red"))
          c.setBackground(Color.RED);
        else {
          if (rowIndex % 2 == 0 && !isCellSelected(rowIndex, vColIndex)) {
            c.setBackground(Color.YELLOW);
          } else {
            // If not shaded, match the table's background
            c.setBackground(getBackground());
          }
        }
        return c;
      }
    };

    JComboBox combo = new JComboBox(colors);
    table.setDefaultEditor(ColorName.class, new DefaultCellEditor(combo));
    table.setRowHeight(20);
    getContentPane().add(new JScrollPane(table));
  }

  public static void main(String args[]) {
    TableWithPrepareRendererExample ex = new TableWithPrepareRendererExample();
    ex.setVisible(true);
  }

  public class ColorName {
    String cname;

    public ColorName(String name) {
      cname = name;
    }

    public String toString() {
      return cname;
    }
  }

}
于 2012-10-27T10:46:38.150 回答
1

我这样做的方式是修改JTable用于绘制表格单元格的代码......

实现你自己的TableCellRenderer. 在该getTableCellRendererComponent()方法中，检查 qty < 重新排序级别是否符合您的要求，如果是，请setBackgroundColor()在Component从该方法返回之前调用。编写 a 的最简单方法TableCellRenderer是查看现有TableCellRenderer使用的源代码JTable- 它只有一种方法，您基本上可以复制它并添加一点代码来进行颜色检查。你设置TableCellRenderer了JTable使用setDefaultRenderer()

正如@mKorbel 在评论中提到的，您也可以通过覆盖该JTable prepareRenderer()方法来实现类似的事情。

做起来并不难，特别是如果您查看现有的 Java 源代码以了解它们是如何做到的。

于 2012-10-27T11:26:28.447 回答
0

在此处输入图像描述

private JTable table;
private SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy");

public TablePrepareRenderer() {
    Object[] columnNames = { "Type", "Company", "Name", "Salery", "Designation" };
    Object[][] data =
    { { "Probation", "Digital Research Lab", "Kamran Ali", "500,000", "Java Developer" }, { "Permenent", "Netsole",
                                                                                            "Farhan Khan",
                                                                                            "80,000",
                                                                                            "System Administaror" },
      { "Contract", "System Limited", "Danyal", "100,000", "Network Administrator" },
      { "Probation", "TeraData", "Ali Raza", "45,000", "IT Officer" },
      { "Contract", "MicroSoft", "Sikandar Hayat", "450,000", "Team Lead" },
      { "Permenent", "MicroSoft", "Adnan", "30,000", "Driver" }, };
    DefaultTableModel model = new DefaultTableModel(data, columnNames) {

        private static final long serialVersionUID = 1L;

        @Override
        public Class getColumnClass(int column) {
            return getValueAt(0, column).getClass();
        }
    };
    table = new JTable(model) {

            private static final long serialVersionUID = 1L;

            @Override
            public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
                Component c = super.prepareRenderer(renderer, row, column);

                if (!isRowSelected(row)) {
                    if (table.getColumnCount() >= 0) {
                        String type = (String)getModel().getValueAt(row, 0);
                        if (type.equalsIgnoreCase("Probation")) {
                            c.setBackground(new Color(198, 190, 255));

                        }
                        if (type.equalsIgnoreCase("Permenent")) {
                            c.setBackground(new Color(14, 255, 190));

                        }
                        if (type.equalsIgnoreCase("Contract")) {
                            c.setBackground(Color.green);

                        }

                    }
                }
                if (isRowSelected(row) && isColumnSelected(column)) {
                    ((JComponent)c).setBorder(new LineBorder(Color.red));
                }
                return c;
            }
        };

    table.setPreferredScrollableViewportSize(table.getPreferredSize());
    JScrollPane scrollPane = new JScrollPane(table);
    getContentPane().add(scrollPane);
}


public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {

        @Override
        public void run() {
            TablePrepareRenderer frame = new TablePrepareRenderer();
            frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
            frame.pack();
            frame.setLocation(150, 150);
            frame.setSize(800, 500);
            frame.setVisible(true);


        }
    });
}

}

于 2017-06-10T11:20:07.107 回答