如何为JTable中的特定行着色 [英] How to color specific rows in a JTable

问题描述

我希望能够突出显示JTable的某些行，具体取决于行本身中的值.例如，如果现有数量< 重新订购级别，该行应在JTable中突出显示.

I want the ability to highlight some rows of JTable, depending on the values in the row itself. For example, if the existing qty < reorder level, that row should be highlighted in the JTable.

我知道有一种表格方法tblItems.setSelectionBackground(Color.yellow);在选择行时有效，但是有没有类似的方法不依赖于选定的行以不同的颜色显示它们呢?

I know there is a table method tblItems.setSelectionBackground(Color.yellow); that works when the rows are selected, but is there a similar method that doesn't rely on the rows being selected to have them show in a different color?

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 
    }

}

推荐答案

您可以使用

you could use my answer to change the color of the cell. the same technique could be used to apply it to each cell in the row.

这也是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;
    }
  }

}

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