如果使用java满足某些条件，如何将颜色设置为某一行？
我有一个jtable。 （tablesummary）。其中一个专栏是EXPIRY。我想突出显示当前日期已经过期的客户的行..
我已经得到了逻辑，但我不能让行变成红色或任何其他颜色。 这是我的代码：
int count = (tableSummary.getRowCount());
NumberFormat formatter = new DecimalFormat("###,###");
String no = formatter.format(count);
txtNo.setText(no);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar cal = Calendar.getInstance();
String expDateString = sdf.format(cal.getTime()).toString();
for(int i=0; i<=tableSummary.getRowCount()-1; i++){
String nnn= tableSummary.getModel().getValueAt(i, 6).toString();
System.out.println(nnn);
int res = nnn.compareTo(expDateString);
if(res>=0){
System.out.println("if ni " + (res>=0));
}
else{
System.out.println("else ni" + (res>=0));
rowrenderer.setBackground(Color.RED);
}
}
任何人都可以帮我这个吗？因为它是我界面的主要亮点之一。 提前致谢 ！！ ：）
3 个答案:
答案 0 :(得分：8)
...在前面的主题和答案中描述，仅为示例
来自代码
import java.awt.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
import javax.swing.border.LineBorder;
import javax.swing.table.*;
public class TablePrepareRenderer extends JFrame {
private static final long serialVersionUID = 1L;
private JTable table;
private Date maturityDate = new Date();
private Date todayDate = new Date();
private SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy");
private Date tableDate = new Date();
private String strDate = "";
private Date modifDate = new Date();
private Calendar cal;
public TablePrepareRenderer() {
Object[] columnNames = {"Type", "Company", "Shares", "Price", "Date"};
Object[][] data = {
{"Buy", "IBM", new Integer(1000), new Double(80.50), new Date()},
{"Sell", "MicroSoft", new Integer(2000), new Double(6.25), new Date()},
{"Sell", "Apple", new Integer(3000), new Double(7.35), new Date()},
{"Buy", "Nortel", new Integer(4000), new Double(20.00), new Date()}
};
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);
/*int firstRow = 0;
int lastRow = table.getRowCount() - 1;
if (row == lastRow) {
((JComponent) c).setBackground(Color.red);
} else if (row == firstRow) {
((JComponent) c).setBackground(Color.blue);
} else {
((JComponent) c).setBackground(table.getBackground());
}*/
if (!isRowSelected(row)) {
if (table.getColumnCount() >= 0) {
String type = (String) getModel().getValueAt(row, 0);
c.setBackground("Buy".equals(type) ? Color.YELLOW : Color.GREEN);
//
maturityDate = new Date();
todayDate = new Date();
strDate = sdf.format(todayDate);
try {
todayDate = sdf.parse(strDate);
} catch (ParseException ex) {
Logger.getLogger(TablePrepareRenderer.class.getName()).log(Level.SEVERE, null, ex);
}
tableDate = (Date) table.getValueAt(row, 4);
strDate = sdf.format(tableDate);
if (strDate != null) {
if (!strDate.isEmpty()) {
try {
maturityDate = sdf.parse(strDate);
} catch (ParseException ex) {
Logger.getLogger(TablePrepareRenderer.class.getName()).log(Level.SEVERE, null, ex);
}
if (maturityDate != null) {
int mmDiffDealToValue = (maturityDate).compareTo(todayDate);
if (((mmDiffDealToValue < 0))) {
c.setBackground(Color.orange);
c.setFont(new Font("Serif", Font.BOLD, 12));
}
}
}
}
//
}
}
if (isRowSelected(row) && isColumnSelected(column)) {
((JComponent) c).setBorder(new LineBorder(Color.red));
}
return c;
}
};
modifyDateInTable();
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane(table);
getContentPane().add(scrollPane);
}
private void modifyDateInTable() {
Calendar c = Calendar.getInstance();
c.setTime(modifDate);
c.add(Calendar.DATE, - 1);
modifDate = c.getTime();
table.setValueAt(modifDate, 0, 4);
c.setTime(modifDate);
c.add(Calendar.DATE, +5);
modifDate = c.getTime();
table.setValueAt(modifDate, 1, 4);
c.setTime(modifDate);
c.add(Calendar.DATE, +1);
modifDate = c.getTime();
table.setValueAt(modifDate, 1, 4);
c.setTime(modifDate);
c.add(Calendar.DATE, - 16);
modifDate = c.getTime();
table.setValueAt(modifDate, 3, 4);
}
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.setVisible(true);
}
});
}
}
答案 1 :(得分：4)
在以下链接中，您可以找到您要执行的操作的示例：http://www.roseindia.net/java/example/java/swing/SadingRows.shtml
您必须覆盖prepareRenderer()上的JTable，并在返回的Component上添加backgroundColor。
PS：为了将来参考，如果你要包含更多代码会更容易。您rowrenderer =）
修改
使用以下代码（而不是正常的JTable table = new JTable(model)声明（如果您想要的不是交替颜色，请更改prepareRenderer方法中的逻辑）：
JTable table = new JTable(model) {
public Component prepareRenderer(TableCellRenderer renderer, int Index_row, int Index_col) {
// get the current row
Component comp = super.prepareRenderer(renderer, Index_row, Index_col);
// even index, not selected
if (Index_row % 2 == 0 && !isCellSelected(Index_row, Index_col)) {
comp.setBackground(Color.lightGray);
} else {
comp.setBackground(Color.white);
}
return comp;
}
};
答案 2 :(得分：0)
public class TablePrepareRenderer extends JFrame {
private JTable table;
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) {
@Override
public Class getColumnClass(int column) {
return getValueAt(0, column).getClass();
}
};
table = new JTable(model) {
@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);
}
});
}
}
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