问题描述
所以我想做的是根据最后一列中的值更改每行的颜色。
我已经找到了这个解决方案： 效果很好。
但是此外，当第四列达到与第二列相同的值时，我想将行的颜色切换为绿色。
我用克里斯蒂安·玛丽安（Cristian Marian）的方法写了自己的课
@Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component comp = super.prepareRenderer(renderer, row, column);
int second = (int) this.getModel().getValueAt(row, 1);
int forth = (int) this.getModel().getValueAt(row, 3);
int kat = Kategorie.getNumber((String) this.getModel().getValueAt(row, 2));
if (kat > 0) {
if (second == forth) {
comp.setBackground(Color.GREEN);
} else {
comp.setBackground(Color.RED);
}
}
return comp;
}
仍然只有每列的最后一个单元格变为绿色，而不是整个单元格。 但是当我在行上计时时，整行会切换颜色
最后一列中的值被另一帧更改。
表格开头：
当最后一列中的值与第二列中的值相同时，它看起来像这样：
达到给定值后：
1楼
方法的问题在于，您使用getTable Cell RendererComponent以便仅更改该单元格的颜色。
我不得不做类似的事情。 基于列的值，我必须为行着色。
我使用了扩展JTable和Override prepareRenderer的类
@Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component comp = super.prepareRenderer(renderer, row, column);
if (populated) { //this if was just to make sure that I have data in my table
/*
*This piece makes the code ignore the rows that are selected as this approach messes up that blue color that selected rows get
*/
int[] rows = this.getSelectedRows();
boolean rowisSelected = false;
for (int rowIndex : rows) {
if (row == rowIndex) {
rowisSelected = true;
break;
}
}
/*
*And this is the part that does the coloring
*/
if (!rowisSelected) {
Integer status = Integer.parseInt((String)
int modelRow = convertRowIndexToModel(row);
this.getModel().getValueAt(modelRow, Constants.HIDDEN_COLUMN));
switch (status) {
case 1:
comp.setForeground(Color.BLACK);
comp.setBackground(Color.WHITE);
break;
case 2:
comp.setForeground(Color.LIGHT_GRAY);
comp.setBackground(Color.WHITE);
break;
case 3:
comp.setForeground(Color.BLACK);
comp.setBackground(Constants.DOWNLOADED_COLOR);
break;
case 4:
comp.setForeground(Color.LIGHT_GRAY);
comp.setBackground(Constants.DOWNLOADED_COLOR);
break;
}
}
}
return comp;
}
您的应该是这样的（没有选中的行）：
@Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component comp = super.prepareRenderer(renderer, row, column);
int modelRow = convertRowIndexToModel(row);
String second = this.getModel().getValueAt(modelRow, 1));
String forth= this.getModel().getValueAt(modelRow, 3));
if(second.equals(forth)){
comp.setBackground(Color.GREEN);
}
return comp;
}
2楼
我对以上问题有另一种解决方案。 就我而言，我有一个包含10列的JTable。 我只希望根据输入的标记突出显示单元格行的特定子集。 在下面所附的示例屏幕截图中，我输入了Mark 167并按下了Find All按钮。 这样，单元格渲染器会突出显示单元格的子集。 即， 脚本编号 ， 候选 ， 标记和等级 为了实现此目的，我创建了一个单元格渲染器以扩展DefaultCellRenderer。 我已经取出了一些与问题无关的代码，因此可能无法编译。 尽管如此，您还是可以大致了解问题的解决方案：
import java.awt.Component; import java.awt.Color; import javax.swing.JTable; import javax.swing.table.DefaultTableCellRenderer; /* * * This class is the Color Renderer for the "Find All" Button. * It basically highlights all of the scripts with a certain color * This renderer is responsible Highlighting the JTable. * Based on the particular Mark that has been entered in the find all * text field * * */ public class MarkSearchColorCellRenderer extends DefaultTableCellRenderer implements ColorCellRenderer, GradeValidation { public MarkSearchColorCellRenderer(int aMark, Color aColor) { the_Mark = aMark; theColor = aColor; } @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { Component cell = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column); setHorizontalAlignment(RIGHT); if ( column == 0 ) // script no column { //check the current Mark within this row //i.e. for this particular candidate Object curMark = table.getValueAt(row, column+2); //highlight this cell a certain color if the //search mark has been found for this particular candidate highlightScripts(curMark, cell); } else if(column == 1) // Candidate No. Column { Object curMark = table.getValueAt(row, column+1); highlightScripts(curMark, cell); } else if ( column == 2 ) // mark column { Object curMark = value; highlightScripts(curMark, cell); } else if (column == 3) // Grade Column { setHorizontalAlignment(LEFT); Object curMark = table.getValueAt(row, column-1); highlightScripts(curMark, cell); } else if (column == 5) // script no column { Object curMark = table.getValueAt(row, column+2); highlightScripts(curMark, cell); } else if( column == 6) // Candidate No. Column { Object curMark = table.getValueAt(row, column+1); highlightScripts(curMark, cell); } else if ( column == 7) // mark column { Object curMark = value; highlightScripts(curMark, cell); } else if ( column == 8) // Grade Column { setHorizontalAlignment(LEFT); Object curMark = table.getValueAt(row, column-1); highlightScripts(curMark, cell); } else { // Should never arrive here. // If it does, then you've rendered a column that may not // function with this class // therefore, I'm going to exit the program //System.exit(0); } table.repaint(); return cell; } // end getTableCellRendererComponent() // Change the color of this cell if the aValue matches // the value within the particular cell private void highlightScripts(Object aValue, Component aCell) { Object value = aValue; Component cell = aCell; if ( value != null ) { if (value instanceof Integer ) { Integer amount = (Integer) value; if( amount.intValue() == the_Mark ) { cell.setBackground( theColor ); } else { cell.setBackground( Color.white ); } } } else { cell.setBackground( Color.white ); } }// end highlightScripts() }//end class/* * * Inside the "Find All" button listener you would attach the * MarkSearchColorCellRenderer to selected JTable columns. * A snippet of the code is as follows: * */ // select a color Color myMarkColor = new Color(226,182,90); // the mark to search Integer markToSearch = new Integer(find_mark_jTextField.getText()); //an instance of the class MarkSearchColorCellRenderer (outlined above) MarkSearchColorCellRenderer my_MarkSearch_CellRenderer = new MarkSearchColorCellRenderer( markToSearch.intValue(),myMarkColor); /* * * Get the all the Table columns of the JTable on which you wish to assign * the particular cell renderer. In my example I have 8 table column's * that I wish to assign the cell renderer * i.e. Script, Candidate, Mark, Grade Script, Candidate, Mark, Grade * * On looking at the screenshot I've ignored the monitor column (check box) */ TableColumn script_column_100_A = first_100_Table.getColumnModel().getColumn(0); TableColumn candidate_column_100_A = first_100_Table.getColumnModel().getColumn(1); TableColumn mark_column_100_A = first_100_Table.getColumnModel().getColumn(2); TableColumn grade_column_100_A = first_100_Table.getColumnModel().getColumn(3); TableColumn script_column_100_B = first_100_Table.getColumnModel().getColumn(5); TableColumn candidate_column_100_B = first_100_Table.getColumnModel().getColumn(6); TableColumn mark_column_100_B = first_100_Table.getColumnModel().getColumn(7); TableColumn grade_column_100_B = first_100_Table.getColumnModel().getColumn(8); /* * * assign the MarkSearchColorCellRenderer to each of the choosen table column's. * * i.e. Script, Candidate, Mark, Grade Script, Candidate, Mark, Grade * */ script_column_100_A.setCellRenderer(my_MarkSearch_CellRenderer ); script_column_100_A.setCellRenderer(my_MarkSearch_CellRenderer ); candidate_column_100_A.setCellRenderer(my_MarkSearch_CellRenderer ); mark_column_100_A.setCellRenderer(my_MarkSearch_CellRenderer ); grade_column_100_A.setCellRenderer(my_MarkSearch_CellRenderer ); script_column_100_B.setCellRenderer(my_MarkSearch_CellRenderer ); candidate_column_100_B.setCellRenderer(my_MarkSearch_CellRenderer ); mark_column_100_B.setCellRenderer(my_MarkSearch_CellRenderer ); grade_column_100_B.setCellRenderer(my_MarkSearch_CellRenderer ); this.repaint();