java 如何在java中更改JTable中单个单元格的背景颜色？
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how to change background color of individual cell in JTable in java?
提问by itro
I search in the table, when i find a match i want to change a bg color of that cell. I did as below but still can't fix it? Can any body help to fix this problem?
我在表格中搜索，当我找到匹配项时，我想更改该单元格的背景颜色。我做了如下但仍然无法修复它？任何机构都可以帮助解决这个问题吗？
public class SearchTable extends JTable {
JTable table;
JTextField textField;
public SearchTable(JTable table, JTextField textField) {
this.table = table;
this.textField = textField;
textField.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
search();
}
});
textField.getDocument().addDocumentListener(new DocumentListener() {
public void insertUpdate(DocumentEvent e) {
search();
}
public void removeUpdate(DocumentEvent e) {
search();
}
public void changedUpdate(DocumentEvent e) {
search();
}
});
}
private void search() {
String target = textField.getText();
for (int row = 0; row < table.getRowCount(); row++)
for (int col = 0; col < table.getColumnCount(); col++) {
String next = (String) table.getValueAt(row, col);
if (next.equals(target)) {
changeBackgroundColor(row, col);
return;
}
}
table.repaint();
}
private void changeBackgroundColor(int row, int col) {
table.setColumnSelectionAllowed(true);
table.setRowSelectionAllowed(true);
boolean toggle = false;
boolean extend = false;
table.changeSelection(row, col, toggle, extend);
//first atempt sets bg color for all cells, it is not OK
//table.setSelectionBackground(Color.green);
//second atempt getting no result
table.getCellEditor(row,col).getTableCellEditorComponent(table,table.getValueAt(row,col),true,row,col).setForeground(Color.red);
//3th atempt getting no result
//Component c = table.getCellRenderer(row, col).getTableCellRendererComponent(table, table.getValueAt(row, col), true, true, row, col);
//c.setForeground(Color.red);
//4th atempt getting no result
//DefaultTableCellRenderer renderer = (DefaultTableCellRenderer) table.getCellRenderer(row, col).getTableCellRendererComponent(table, table.getValueAt(row, col), true, true, row, col).;
//renderer.setBorder(new LineBorder(Color.red));
}
}
回答by mKorbel
You can use XxxCellRenderer, better and easiest is to use prepareRenderer()
您可以使用XxxCellRenderer，更好和最简单的是使用prepareRenderer()
for correct code you have to override or test inside if-else follows patameters
要获得正确的代码，您必须在 if-else 后面的参数中覆盖或测试
isSelected
hasFocus
column
row
已选择
有焦点
柱子
排
Please to check answersand one questionabout similair issue, there are two simple ways, sorry I‘m in FRI trafic, brrrrr
回答by Mohsin
You need to set the cell renderer to the column first -
您需要先将单元格渲染器设置为列 -
col.setCellRenderer( new TableCellRenderer() {
public Component getTableCellRendererComponent( JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column )
{
Component cell = centerRenderer.getTableCellRendererComponent( table, value, isSelected, hasFocus, row, column );
cell.setForeground(Color.green);
}
});
