Java JTable增量单元填充

如何根据JTable单元格的值以增量方式填充该单元格。就像进度条一样

注: 我不想用JProgress吧！

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我想知道是否有一种方法可以直接在单元格绘制渲染器中进行渲染，因此，单元格渲染的责任归结为

TableCellRenderer

，请查看，并获取更多详细信息

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;

public class Test {

    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            setLayout(new BorderLayout());
            DefaultTableModel model = new DefaultTableModel(1, 1);
            model.setValueAt(0, 0, 0);
            JTable table = new JTable(model);
            table.getColumnModel().getColumn(0).setCellRenderer(new ProgressTableCellRenderer());
            add(new JScrollPane(table));

            Timer timer = new Timer(500, new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    Integer value = (Integer)table.getValueAt(0, 0);
                    value++;
                    if (value > 100) {
                        value = 100;
                        ((Timer)e.getSource()).stop();
                    }
                    System.out.println(value);
                    table.setValueAt(value, 0, 0);
                }
            });
            timer.start();
        }

    }

    public class ProgressTableCellRenderer extends JPanel implements TableCellRenderer {

        private int progressValue;

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            if (value instanceof Integer) {
                progressValue = (Integer)value;
            }
            return this;
        }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2d = (Graphics2D) g.create();
            g2d.setColor(UIManager.getColor("List.selectionBackground"));
            int x = (int) (getWidth() * (progressValue / 100d));
            g2d.fillRect(0, 0, x, getHeight());
            g2d.dispose();
        }


    }

}

剩下的部分可以归结为简单的定制绘画，看一看，了解更多细节

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;

public class Test {

    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            setLayout(new BorderLayout());
            DefaultTableModel model = new DefaultTableModel(1, 1);
            model.setValueAt(0, 0, 0);
            JTable table = new JTable(model);
            table.getColumnModel().getColumn(0).setCellRenderer(new ProgressTableCellRenderer());
            add(new JScrollPane(table));

            Timer timer = new Timer(500, new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    Integer value = (Integer)table.getValueAt(0, 0);
                    value++;
                    if (value > 100) {
                        value = 100;
                        ((Timer)e.getSource()).stop();
                    }
                    System.out.println(value);
                    table.setValueAt(value, 0, 0);
                }
            });
            timer.start();
        }

    }

    public class ProgressTableCellRenderer extends JPanel implements TableCellRenderer {

        private int progressValue;

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            if (value instanceof Integer) {
                progressValue = (Integer)value;
            }
            return this;
        }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2d = (Graphics2D) g.create();
            g2d.setColor(UIManager.getColor("List.selectionBackground"));
            int x = (int) (getWidth() * (progressValue / 100d));
            g2d.fillRect(0, 0, x, getHeight());
            g2d.dispose();
        }


    }

}

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有很多方法可以做到这一点。单元格的值必须是标记，其余的都是琐碎的代码我已经知道了很多我想。。。问题是我需要知道“琐碎的绘画代码”，以及它放在哪里@覆盖油漆？对不起，我对Java和JTable还很陌生。因此，我们需要举一个小例子。好吧，渲染单元格的责任可以归结为

TableCellRenderer

，所以我们可以从这里开始；）我也已经意识到了这一点。因为我有基于单元格中的值的自定义背景。现在我只想做一个柱状图样式的填充，而不仅仅是一个striaght填充。我该怎么做？我不知道如何用java“画画”。我只是使用了挫折的方法来设置一个颜色。如何手动绘制单元格？感谢您花时间领导Java noob！！我还是不确定我是否喜欢Java。这是一个非常令人沮丧的问题：100天的除法。如何在那里填写自己的变量并使其工作？？因为我想取我拥有的最高值，然后根据该最大值计算所有其他值。但是当我在那里输入maxVolume变量时，单元格不会绘制。请将值标准化，使其介于0-1（或0-100，更容易），这将使渲染器更容易完成其工作