java 在面板上绘制 JTable 行和列

Drawing JTable rows and columns on a Panel

提问by user1709952

I am writing one application in which I have to draw JTable component on a canvas. But after my several attempts still unable to draw a completely perfect picture of a JTable. I tried to draw using sizes of specific cells of a JTable using getCellRect api, but when data is big not able to draw specific cells on the canvas. Here is the sample code:-

我正在编写一个应用程序，我必须在其中在画布上绘制 JTable 组件。但是经过我的多次尝试仍然无法画出一个完全完美的JTable图。我尝试使用 getCellRect api 使用 JTable 的特定单元格的大小进行绘制，但是当数据很大时无法在画布上绘制特定单元格。这是示例代码：-

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.*;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.table.*;
import java.util.*;
import java.awt.*;

public class SimpleTableDemo extends JPanel {
    private boolean DEBUG = false;
      private int spacing = 6;
      private Map columnSizes = new HashMap();
      String[] columnNames = {"First Name",
                                "Last Name",
                                "Sport",
                                "# of Years",
                                "Vegetarian"};

        Object[][] data = {
        {"Kathy", "Smith",
         "SnowboardingXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", new Integer(5), new Boolean(false)},
        {"John", "Doe",
         "Rowing", new Integer(3), new Boolean(true)},
        {"Sue", "Black",
         "Knitting", new Integer(2), new Boolean(false)},
        {"Jane", "White",
         "Speed reading", new Integer(20), new Boolean(true)},
        {"Joe", "Brown",
         "Pool", new Integer(10), new Boolean(false)}
        };

        final JTable table = new JTable(data, columnNames);
        Panel1 panel;

    public SimpleTableDemo() {
        super(new GridLayout(3,0));


        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        //table.setFillsViewportHeight(true);

        if (DEBUG) {
            table.addMouseListener(new MouseAdapter() {
                public void mouseClicked(MouseEvent e) {
                    printDebugData(table);
                }
            });
        }

        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);

        //Add the scroll pane to this panel.
        add(scrollPane);

        panel = new Panel1();
        Rectangle rect = table.getCellRect(0,0,true);

        panel.setX(table.getWidth());
        panel.setY(0);
        panel.setWidth(rect.width);
        panel.setHeight(rect.height);
        panel.setStr(table.getModel().getValueAt(0,0).toString());
        panel.setModel(table);

        add(panel);

        final JComboBox jNumberComboBoxSize = new JComboBox();
        jNumberComboBoxSize.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "11", "12", "14", "16", "18", "20", "24", "30", "36", "48", "72" }));
        jNumberComboBoxSize.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
               jNumberComboBoxSizeActionPerformed(jNumberComboBoxSize);
            }
        });

        JPanel panel2 = new JPanel();
        panel2.add(jNumberComboBoxSize);

        add(panel2);
        adjustColumns();

    }

    private void jNumberComboBoxSizeActionPerformed(JComboBox jNumberComboBoxSize)
    {
        int fontSize = Integer.parseInt(jNumberComboBoxSize.getSelectedItem().toString());
        table.setRowHeight(fontSize);
        table.setFont(new Font("Serif", Font.BOLD, fontSize));
        Rectangle rect = table.getCellRect(0,0,true);
        panel.setX(0);
        panel.setY(0);
       // panel.setWidth(rect.width);
        panel.setHeight(rect.height);
        panel.setStr(table.getModel().getValueAt(0,0).toString());
        panel.setModel(table);
        panel.repaint();
        table.revalidate();
    }

    private void printDebugData(JTable table) {
        int numRows = table.getRowCount();
        int numCols = table.getColumnCount();
        javax.swing.table.TableModel model = table.getModel();

        System.out.println("Value of data: ");
        for (int i=0; i < numRows; i++) {
            System.out.print("    row " + i + ":");
            for (int j=0; j < numCols; j++) {
                System.out.print("  " + model.getValueAt(i, j));
            }
            System.out.println();
        }
        System.out.println("--------------------------");
    }

     /*
     *  Adjust the widths of all the columns in the table
     */
    public void adjustColumns()
    {
        TableColumnModel tcm = table.getColumnModel();

        for (int i = 0; i < tcm.getColumnCount(); i++)
        {
            adjustColumn(i);
        }
    }

    /*
     *  Adjust the width of the specified column in the table
     */
    public void adjustColumn(final int column)
    {
        TableColumn tableColumn = table.getColumnModel().getColumn(column);

        if (! tableColumn.getResizable()) return;

        int columnHeaderWidth = getColumnHeaderWidth( column );
        int columnDataWidth   = getColumnDataWidth( column );
        int preferredWidth    = Math.max(columnHeaderWidth, columnDataWidth);
        panel.setWidth(preferredWidth);
        updateTableColumn(column, preferredWidth);
    }

    /*
     *  Calculated the width based on the column name
     */
    private int getColumnHeaderWidth(int column)
    {
        TableColumn tableColumn = table.getColumnModel().getColumn(column);
        Object value = tableColumn.getHeaderValue();
        TableCellRenderer renderer = tableColumn.getHeaderRenderer();

        if (renderer == null)
        {
            renderer = table.getTableHeader().getDefaultRenderer();
        }

        Component c = renderer.getTableCellRendererComponent(table, value, false, false, -1, column);
        return c.getPreferredSize().width;
    }

    /*
     *  Calculate the width based on the widest cell renderer for the
     *  given column.
     */
    private int getColumnDataWidth(int column)
    {
        int preferredWidth = 0;
        int maxWidth = table.getColumnModel().getColumn(column).getMaxWidth();

        for (int row = 0; row < table.getRowCount(); row++)
        {
            preferredWidth = Math.max(preferredWidth, getCellDataWidth(row, column));

            //  We've exceeded the maximum width, no need to check other rows

            if (preferredWidth >= maxWidth)
                break;
        }

        return preferredWidth;
    }

    /*
     *  Get the preferred width for the specified cell
     */
    private int getCellDataWidth(int row, int column)
    {
        //  Inovke the renderer for the cell to calculate the preferred width

        TableCellRenderer cellRenderer = table.getCellRenderer(row, column);
        Component c = table.prepareRenderer(cellRenderer, row, column);
        int width = c.getPreferredSize().width + table.getIntercellSpacing().width;

        return width;
    }

    /*
     *  Update the TableColumn with the newly calculated width
     */
    private void updateTableColumn(int column, int width)
    {
        final TableColumn tableColumn = table.getColumnModel().getColumn(column);

        if (! tableColumn.getResizable()) return;

        width += spacing;

        //  Don't shrink the column width

        width = Math.max(width, tableColumn.getPreferredWidth());


        columnSizes.put(tableColumn, new Integer(tableColumn.getWidth()));
        table.getTableHeader().setResizingColumn(tableColumn);
        tableColumn.setWidth(width);
    }

    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("SimpleTableDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        SimpleTableDemo newContentPane = new SimpleTableDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

class Panel1 extends JPanel
{
    int x;
    int y;
    int width;
    int height;
    String str;
    JTable model;

    public void setModel(JTable model)
    {
       this.model = model;
    }

    public void setX(int x)
    {
        this.x = x;
    }

    public void setY(int y)
    {
        this.y = y;
    }

    public void setWidth(int w)
    {
        this.width = w;
    }

    public void setHeight(int h)
    {
        this.height = h;
    }

    public void setStr(String s)
    {
        this.str = s;
    }

    public void paint(Graphics g)
    {
        super.paint(g);
        int initX= 0;
        for(int row=0;row < 5; ++row)
        {
            initX = x;
            for (int col=0;col < 5;++col)
            {
                g.drawRect(x,y,width,height);
                g.drawString(model.getModel().getValueAt(row,col).toString(),x + 10,y + 10);
                x = x + width;
            }
            x = initX;
            y = y + height;

        }

    }
};

---

---

I modified this code to redraw column cells with Font sizes and borders. I want to draw all these table customizations, Please take a look and suggest something.

我修改了此代码以使用字体大小和边框重新绘制列单元格。我想绘制所有这些表格自定义，请看一看并提出建议。

Thanks

谢谢

SimpleTableDemo.java

SimpleTableDemo.java

   package com.swing.data;


import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.HashMap;
import java.util.Map;

import javax.swing.BorderFactory;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;

public class SimpleTableDemo extends JPanel 
{
    private boolean DEBUG = false;
    private int spacing = 6;
    private Map columnSizes = new HashMap();
    String[] columnNames = {"First Name","Last Name","Sport","# of Years","Vegetarian"};

    Object[][] data = 
        {
            {"Kathy", "Smith","SnowboardingXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", new Integer(5), new Boolean(false)},
            {"John", "Doe","Rowing", new Integer(3), new Boolean(true)},
            {"Sue", "Black","Knitting", new Integer(2), new Boolean(false)},
            {"Jane", "White","Speed reading", new Integer(20), new Boolean(true)},
            {"Joe", "Brown","Pool", new Integer(10), new Boolean(false)}
        };

    JTable table = new JTable(data, columnNames);
    Panel1 panel;

    public SimpleTableDemo() 
    {
        super(new GridLayout(3,0));      
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        if (DEBUG) 
        {
            table.addMouseListener(new MouseAdapter() {
                public void mouseClicked(MouseEvent e) {
                    printDebugData(table);
                }
            });
        }
        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);


        //Add the scroll pane to this panel.
        add(scrollPane);

        panel = new Panel1();
//      Rectangle rect = table.getCellRect(0,0,true);
//
// 
//      panel.setX(table.getWidth());
//
//      panel.setY(0);
//      panel.setWidth(rect.width);
//      panel.setHeight(rect.height);
//      panel.setStr(table.getModel().getValueAt(0,0).toString());

        panel.setModel(table);

        add(panel);

        final JComboBox jNumberComboBoxSize = new JComboBox();
        jNumberComboBoxSize.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "11", "12", "14", "16", "18", "20", "24", "30", "36", "48", "72" }));
        jNumberComboBoxSize.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
               jNumberComboBoxSizeActionPerformed(jNumberComboBoxSize);
            }
        });

        JPanel panel2 = new JPanel();
        panel2.add(jNumberComboBoxSize);

        add(panel2);
        adjustColumns();
    }

    private void jNumberComboBoxSizeActionPerformed(JComboBox jNumberComboBoxSize)
    {
        int fontSize = Integer.parseInt(jNumberComboBoxSize.getSelectedItem().toString());
        table.setRowHeight(fontSize);
        setBorder(new Font("Serif", Font.BOLD, fontSize));
        table.setFont(new Font("Serif", Font.BOLD, fontSize));
        panel.setFont(new Font("Serif", Font.BOLD, fontSize));
        Rectangle rect = table.getCellRect(0,0,true);
        panel.setX(0);
        panel.setY(0);
        panel.setHeight(rect.height);
        panel.setStr(table.getModel().getValueAt(0,0).toString());
        panel.setModel(table);
        panel.repaint();
        table.revalidate();
    }

    public void setBorder(Font f)
    {
        BorderCellRenderer cellRenderer = new BorderCellRenderer();
        cellRenderer.setColumnBorder(BorderFactory.createLineBorder(Color.BLACK, 2)); 
        cellRenderer.setFont(f);
        table.getColumnModel().getColumn(0).setCellRenderer(cellRenderer);
        table.getColumnModel().getColumn(1).setCellRenderer(cellRenderer);

    }
    private void printDebugData(JTable table) 
    {
        int numRows = table.getRowCount();
        int numCols = table.getColumnCount();
        javax.swing.table.TableModel model = table.getModel();

        System.out.println("Value of data: ");
        for (int i=0; i < numRows; i++) 
        {
            System.out.print("    row " + i + ":");
            for (int j=0; j < numCols; j++) 
            {
                System.out.print("  " + model.getValueAt(i, j));
            }
            System.out.println();
        }
        System.out.println("--------------------------");
    }

     /*
     *  Adjust the widths of all the columns in the table
     */
    public void adjustColumns()
    {
        TableColumnModel tcm = table.getColumnModel();

        for (int i = 0; i < tcm.getColumnCount(); i++)
        {
            adjustColumn(i);
        }
    }

    /*
     *  Adjust the width of the specified column in the table
     */
    public void adjustColumn(int column)
    {
        TableColumn tableColumn = table.getColumnModel().getColumn(column);

        if (! tableColumn.getResizable()) return;

        int columnHeaderWidth = getColumnHeaderWidth( column );
        int columnDataWidth   = getColumnDataWidth( column );
        int preferredWidth    = Math.max(columnHeaderWidth, columnDataWidth);
        panel.setWidth(preferredWidth);
        updateTableColumn(column, preferredWidth);
    }

    /*
     *  Calculated the width based on the column name
     */
    private int getColumnHeaderWidth(int column)
    {
        TableColumn tableColumn = table.getColumnModel().getColumn(column);
        Object value = tableColumn.getHeaderValue();
        TableCellRenderer renderer = tableColumn.getHeaderRenderer();

        if (renderer == null)
        {
            renderer = table.getTableHeader().getDefaultRenderer();
        }

        Component c = renderer.getTableCellRendererComponent(table, value, false, false, -1, column);
        return c.getPreferredSize().width;
    }

    /*
     *  Calculate the width based on the widest cell renderer for the
     *  given column.
     */
    private int getColumnDataWidth(int column)
    {
        int preferredWidth = 0;
        int maxWidth = table.getColumnModel().getColumn(column).getMaxWidth();

        for (int row = 0; row < table.getRowCount(); row++)
        {
            preferredWidth = Math.max(preferredWidth, getCellDataWidth(row, column));

            if (preferredWidth >= maxWidth)
                break;
        }

        return preferredWidth;
    }

    /*
     *  Get the preferred width for the specified cell
     */
    private int getCellDataWidth(int row, int column)
    {
        //  Inovke the renderer for the cell to calculate the preferred width

        TableCellRenderer cellRenderer = table.getCellRenderer(row, column);
        Component c = table.prepareRenderer(cellRenderer, row, column);
        int width = c.getPreferredSize().width + table.getIntercellSpacing().width;

        return width;
    }

    /*
     *  Update the TableColumn with the newly calculated width
     */
    private void updateTableColumn(int column, int width)
    {
        final TableColumn tableColumn = table.getColumnModel().getColumn(column);

        if (! tableColumn.getResizable()) return;

        width += spacing;

        //  Don't shrink the column width

        width = Math.max(width, tableColumn.getPreferredWidth());


        columnSizes.put(tableColumn, new Integer(tableColumn.getWidth()));
        table.getTableHeader().setResizingColumn(tableColumn);
        tableColumn.setWidth(width);
    }

    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI()
    {
        //Create and set up the window.
        JFrame frame = new JFrame("SimpleTableDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        SimpleTableDemo newContentPane = new SimpleTableDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) 
    {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

**Panel1.java**

    package com.swing.data;

import java.awt.Font;
import java.awt.Graphics;
import java.awt.Rectangle;

import javax.swing.JPanel;
import javax.swing.JTable;


class Panel1 extends JPanel
{
    int x;
    int y;
    int width;
    int height;
    String str;
    JTable model;
    Font font;

    public Font getFont() {
        return font;
    }
    public void setFont(Font font) {
        this.font = font;
    }
    public void setModel(JTable model)
    {
       this.model = model;
    }
    public JTable getModel()
    {
        return model;
    }

    public void setX(int x)
    {
        this.x = x;
    }

    public void setY(int y)
    {
        this.y = y;
    }

    public void setWidth(int w)
    {
        this.width = w;
    }

    public void setHeight(int h)
    {
        this.height = h;
    }

    public void setStr(String s)
    {
        this.str = s;
    }

    public void paint(Graphics g)
    {
        super.paint(g);
//      int initX= 0;
//      for(int row=0;row < 5; ++row)
//      {
//          initX = x;
//          for (int col=0;col < 5;++col)
//          {
//              g.drawRect(x,y,width,height);
//              String str = model.getModel().getValueAt(row, col).toString();
//              int xloc =  (x+10);
//              int yloc = y +10;
////                System.out.println("xloc : "+xloc);
////                System.out.println("yloc : "+yloc);
////                System.out.println("width : "+width);
////                System.out.println("height : "+height);
////                System.out.println("str : "+str);
//              
//              g.drawString(model.getModel().getValueAt(row,col).toString(),x + 10,y + 10);
//              x = x + width;
//          }
//            x = initX;
//          y = y + height;
// 
//      }

        System.out.println("Inside paint() >>>>>>>>>>>>>>>>>>>>>");

        JTable table = getModel();
        int columnCount = table.getModel().getColumnCount();
        int rowCount = table.getModel().getRowCount();
        int yLoc = 10;
        int rowHeight = 0 ;
        int columnWidth  = 0 ;
        g.setFont(font);
        for(int r = 0 ; r < rowCount; r++)
        {
            int xLoc = 0 ;
            for(int c= 0 ; c< columnCount; c++)
            {
                Rectangle rect = table.getCellRect(r, c, true);
                columnWidth = rect.width;
                rowHeight = rect.height;
                g.drawRect(xLoc, yLoc, columnWidth, rowHeight);
                String displayString = table.getValueAt(r, c).toString(); 
                System.out.println("displayString ::"+displayString);
                g.drawString(displayString, xLoc+5, yLoc+15);
                xLoc+= columnWidth; 
            }
            yLoc+= rowHeight;
        }
    }
}

**BorderCellRenderer.java**
package com.swing.data;

import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.border.*;

/**
 * @version 1.0 03/06/99
 */
public class BorderCellRenderer extends JLabel
    implements TableCellRenderer {
  protected Border noFocusBorder; 
  protected Border columnBorder; 
  protected Font font;

  public Font getFont() {
    return font;
}

public void setFont(Font font) {
    this.font = font;
}

public BorderCellRenderer() {
    noFocusBorder = new EmptyBorder(1, 2, 1, 2);
    setOpaque(true);
  }

  public Component getTableCellRendererComponent(JTable table, Object value,
                 boolean isSelected, boolean hasFocus, int row, int column) {
      setText((value == null) ? "" : value.toString());
      setBorder(columnBorder);
      setFont(font);
    return this;
  }

  public void setColumnBorder(Border border) {
    columnBorder = border;
  }

  public Border getColumnBorder() {
    return columnBorder;
  }
}

Please suggest something to redraw the appropriate JTable font and borders.

请建议重绘适当的 JTable 字体和边框。

回答by trashgod

Several problems are apparent:

几个问题很明显：

1. You appear to be creating your own table view using the geometry of an exiting JTable; those sizes may not be valid until after pack().

2. You loop through the columns in adjustColumns, but only the last column width is set in panel, which then becomes the constant width seen in your table.

3. Your implementation will scale poorly compared JTableitself, which uses flyweight rendering, illustrated here.

4. Your paneldisappears when the frame is resized; you should either call repaintexplicitly, listen to the TableModel, or use JTableitself.

5. Since Java 5, autoboxingallows the following; compare:

   {"John", "Doe", "Rowing", new Integer(3), new Boolean(true)}
   {"John", "Doe", "Rowing", 3, true}
   

6. Don't replacethe content pane; add()your panel to it; compare:

   frame.setContentPane(newContentPane);
   frame.add(newContentPane);
   

7. Your use of GridLayout(3,0)suggests a misunderstanding; to get an arbitrary number of rows in one column use GridLayout(0, 1).

8. As you extend JPanel, note that "Swing programs should override paintComponent()instead of overriding paint();" see also Painting in AWT and Swing: The Paint Methods.

1. 您似乎正在使用现有的几何图形创建自己的表格视图JTable；这些尺寸可能在 之后才有效pack()。

2. 您循环遍历 中的列adjustColumns，但只有最后一列的宽度设置在 中panel，然后成为表格中看到的恒定宽度。

3. 具体如何实施规模比较差的JTable本身，它采用轻量级的渲染，说明这里。

4. panel调整框架大小时，您的消失；您应该repaint显式调用、收听TableModel或使用JTable它自己。

5. 从 Java 5 开始，自动装箱允许以下操作；比较：

   {"John", "Doe", "Rowing", new Integer(3), new Boolean(true)}
   {"John", "Doe", "Rowing", 3, true}
   

6. 不要替换内容窗格；add()你的面板；比较：

   frame.setContentPane(newContentPane);
   frame.add(newContentPane);
   

7. 您的使用GridLayout(3,0)表明存在误解；要获得一列中任意数量的行，请使用GridLayout(0, 1).

8. 在扩展时JPanel，请注意“Swing 程序应该覆盖paintComponent()而不是覆盖paint()；” 另请参阅在 AWT 和 Swing 中绘画：绘画方法。

回答by Andrew Thompson

An alternative is to render the table as HTML in a JLabel.

另一种方法是将表格呈现为 .html 文件中的 HTML JLabel。

import java.awt.*;
import javax.swing.*;

public class HTMLTableDemo {

    HTMLTableDemo() {
        StringBuilder sb = new StringBuilder();
        sb.append("<html><body><table border=1>");

        sb.append("<tr>");
        for ( String columnName : columnNames ) {
            sb.append("<th>");
            sb.append(columnName);
            sb.append("</th>");
        }
        sb.append("</tr>");
        for (Object[] row : data) {
            sb.append("<tr>");
            for (Object value : row) {
                sb.append("<td>");
                sb.append(value);
                sb.append("</td>");

            }
            sb.append("</tr>");
        }
        sb.append("</table>");
        JLabel html = new JLabel(sb.toString());

        JOptionPane.showMessageDialog(null, html);
    }

    public static void main(String[] args) {
        Runnable r = new Runnable() {
            @Override
            public void run() {
                new HTMLTableDemo();
            }
        };
        SwingUtilities.invokeLater(r);
    }

    String[] columnNames = {
            "First Name",
            "Last Name",
            "Sport",
            "# of Years",
            "Vegetarian"
    };

    Object[][] data = {
            {"Kathy", "Smith", "Snowboarding", new Integer(5), new Boolean(false)},
            {"John", "Doe", "Rowing", new Integer(3), new Boolean(true)},
            {"Sue", "Black", "Knitting", new Integer(2), new Boolean(false)},
            {"Jane", "White", "Speed reading", new Integer(20), new Boolean(true)},
            {"Joe", "Brown", "Pool", new Integer(10), new Boolean(false)}
    };
}

For rendering it to a Graphicsinstance, see the LabelRenderTest.javasource on this answer.

要将其渲染到Graphics实例，请参阅此答案的LabelRenderTest.java来源。

回答by ajay partoti

I got success in mapping one to one drawing using the below code:-

我使用以下代码成功地映射了一对一的绘图：-

Panel1.java

面板1.java

package com.swing.data;

import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.font.FontRenderContext;

import javax.swing.JPanel;
import javax.swing.JTable;


class Panel1 extends JPanel
{
    int x;
    int y;
    int width;
    int height;
    String str;
    JTable model;
    Font font;

    public Font getFont() {
        return font;
    }
    public void setFont(Font font) {
        this.font = font;
    }
    public void setModel(JTable model)
    {
       this.model = model;
    }
    public JTable getModel()
    {
        return model;
    }

    public void setX(int x)
    {
        this.x = x;
    }

    public void setY(int y)
    {
        this.y = y;
    }

    public void setWidth(int w)
    {
        this.width = w;
    }

    public void setHeight(int h)
    {
        this.height = h;
    }

    public void setStr(String s)
    {
        this.str = s;
    }

    public void paint(Graphics g)
    {
        super.paint(g);
//      int initX= 0;
//      for(int row=0;row < 5; ++row)
//      {
//          initX = x;
//          for (int col=0;col < 5;++col)
//          {
//              g.drawRect(x,y,width,height);
//              String str = model.getModel().getValueAt(row, col).toString();
//              int xloc =  (x+10);
//              int yloc = y +10;
////                System.out.println("xloc : "+xloc);
////                System.out.println("yloc : "+yloc);
////                System.out.println("width : "+width);
////                System.out.println("height : "+height);
////                System.out.println("str : "+str);
//              
//              g.drawString(model.getModel().getValueAt(row,col).toString(),x + 10,y + 10);
//              x = x + width;
//          }
//            x = initX;
//          y = y + height;
// 
//      }

        System.out.println("Inside paint() >>>>>>>>>>>>>>>>>>>>>");
        FontMetrics fm = g.getFontMetrics(font);
        JTable table = getModel();
        int columnCount = table.getModel().getColumnCount();
        int rowCount = table.getModel().getRowCount();
        int yLoc =10;
        int rowHeight = 0 ;
        int columnWidth  = 0 ;
        double w = 0;
        double h = 0;
        FontRenderContext frc = fm.getFontRenderContext();


        g.setFont(font);
        for(int r = 0 ; r < rowCount; r++)
        {
            int xLoc = 0 ;
            int yPad = 0;
            for(int c= 0 ; c< columnCount; c++)
            {
                Rectangle rect = table.getCellRect(r, c, true);
                String displayString = table.getValueAt(r, c).toString(); 
                columnWidth = rect.width;
                rowHeight = rect.height;

                w = (double)font.getStringBounds(displayString, frc).getWidth();
                h = (double)font.getStringBounds(displayString, frc).getHeight();
                //yPad = (int) Math.ceil((rowHeight - h)/2); 
                yPad = Math.abs((int)(rowHeight - h)/2);
                System.out.println("displayString ::"+displayString + "rowHeight:" + rowHeight +"String height:" + h+"yPad:"+yPad +"xLoc:"+xLoc+"yLoc:"+yLoc);
                g.drawString(displayString, xLoc , yLoc + rowHeight - yPad);
                g.drawRect(xLoc, yLoc, columnWidth, rowHeight);
                xLoc+= columnWidth + table.getIntercellSpacing().width; 
            }
            yLoc+= rowHeight + table.getIntercellSpacing().height;
        }
    }
}

Thanks

谢谢