java - 如何在jtable中动态设置行的颜色？

Question

看了很多文章但不明白怎么做!

我想更改 JTable 中某些行的颜色。该表有 3 列:a、b 和 c。

规则

1. 如果a的值<=b则整行的颜色必须是红色
2. 如果a的值>=c则整行的颜色必须是黄色
3. 默认情况下，行的颜色必须为蓝色。

Answer 1

尝试以下代码

public class IconifiedRenderer extends JLabel implements TableCellRenderer {
public IconifiedRenderer() {
}
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    JLabel label = this;
    int cellValueA=-1;
    int cellValueB=-1;
    int cellValueC=-1;
    try {
        setOpaque(true);
        label.setText(String.valueOf(value));
       try {
            cellValueA = Integer.parseInt(String.valueOf( table.getValueAt(row, 0))); //0th for A
        } catch (ArrayIndexOutOfBoundsException aa) {
            //ignore
            cellValueA=-1;
        }
       try {
            cellValueB = Integer.parseInt(String.valueOf( table.getValueAt(row, 1))); //1th for A
        } catch (ArrayIndexOutOfBoundsException aa) {
            //ignore
            cellValueB=-1;
        }
       try {
            cellValueC = Integer.parseInt(String.valueOf( table.getValueAt(row, 2))); //2th for A
        } catch (ArrayIndexOutOfBoundsException aa) {
            //ignore
            cellValueC=-1;
        }
       label.setBackground(Color.BLUE);

       if(cellValueA<=cellValueB){
           label.setBackground(Color.RED);
       }
       if(cellValueA>=cellValueC){
           label.setBackground(Color.YELLOW);
       }
    } catch (Exception ex) {
        // no need to handle
    }
    return label;
}

添加此渲染类并在表格列上设置渲染

    jTable1.getColumnModel().getColumn(0).setCellRenderer(new IconifiedRenderer());
    jTable1.getColumnModel().getColumn(1).setCellRenderer(new IconifiedRenderer());
    jTable1.getColumnModel().getColumn(2).setCellRenderer(new IconifiedRenderer());

它会像这样显示你的表格...