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我正在寻找如何更改我的某些行的颜色，这些行在JTable整数向量中具有索引Notfoundrow，但我遇到的问题是表中的所有行都将颜色更改为红色！

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调用这个类：

tableM.setDefaultRenderer(Object.class, new MonCellRenderer());

tableM是我想要改变颜色的表，如果它的行。

感谢您的任何帮助。

4

1 回答 1

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);
}

在此处输入图像描述

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Java 编程语言的代码约定

于 2013-05-27T11:43:41.160 回答