我正在寻找如何更改JTable
中某些行的颜色,这些行的索引位于名为Notfoundrow
的整数向量中,但我所遇到的问题是表中的所有行将颜色改为红色!!
这是我的代码:
package essai_trafficclass;
import java.awt.Color;
import java.awt.Component;
import java.util.ArrayList;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
public class MonCellRenderer extends DefaultTableCellRenderer {
public static ArrayList<Integer> Notfoundrow1 = OneWayRelation.Notfoundrow;
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);
int L = 0;
while (L < Notfoundrow1.size()) {
System.out.println("la valeur du vecteur " + Notfoundrow1.get(L));
if (row == Notfoundrow1.get(L) && column == 1) {
cell.setBackground(Color.RED);
} else if (row == Notfoundrow1.get(L) && column == 1) {
cell.setBackground(Color.RED);
} else {
cell.setBackground(Color.WHITE);
}
L++;
}
return cell;
}
}
然后我通过以下方式打电话给这个班级:
tableM.setDefaultRenderer(Object.class, new MonCellRenderer());
tableM
是我要更改颜色的表格。
感谢您的帮助。
答案 0 :(得分:4)
你可以大大简化你的逻辑......
而不是你的while
循环,利用API的可用功能...
if (column == 1 || Notfoundrow1.contains(row)) {
setBackground(Color.RED);
} else {
setBackground(Color.WHITE);
}
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.EventQueue;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
public class TestCellRenderer02 {
public static void main(String[] args) {
new TestCellRenderer02();
}
private List<Integer> notFound = new ArrayList<>(25);
public TestCellRenderer02() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
Random rand = new Random(System.currentTimeMillis());
DefaultTableModel model = new DefaultTableModel(new Object[]{"A", "B"}, 0);
for (int index = 0; index < 100; index++) {
model.addRow(new Object[]{index, index});
if (rand.nextBoolean()) {
notFound.add(index);
System.out.println("Not found @ " + index);
}
}
JTable table = new JTable(model);
table.setDefaultRenderer(Object.class, new MonCellRenderer());
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new JScrollPane(table));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class MonCellRenderer extends DefaultTableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
super.getTableCellRendererComponent(table, value,
isSelected, hasFocus, row, column);
if (column == 1 || notFound.contains(row)) {
setBackground(Color.RED);
} else {
setBackground(Color.WHITE);
}
return this;
}
}
}
ps-您可能还想阅读Code Conventions for the Java Programming Language