将jbutton添加到jtable

Question

我的系统有jtable，我需要把jbuttons放在桌子上。我尝试在互联网上搜索，但这是我理解的唯一代码一点点。这是我找到代码JButton in JTable Cell: How to add, assign or fill up JTable’s Cell with JButton and then add ActionListener to enable Click event for that JButtons in JTable cell.

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这是代码：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.TableModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.*;

class ButtonInJTable extends JFrame{
    private JPanel topPanel,topPanel1;
    private JTable table;
    private JScrollPane scrollPane,scrollPane1;
    private String[] columnNames= new String[3];
    private String[][] dataValues=new String[3][3] ;
    JButton button = new JButton();

    public ButtonInJTable(){
        setTitle("Button in JTable Cell");
        setSize(300,300);
        topPanel= new JPanel();
        topPanel.setLayout(new BorderLayout());
        getContentPane().add(topPanel);
        columnNames=new String[] {"Column 1" , "Column 2" , "Column 3"};
        dataValues = new String[][] {{"1","2",}, {"4","5",}, {"7","8",}};
        TableModel model=new myTableModel("owntable");
        table =new JTable( );
        table.setModel(model);
        table.getColumn("Column 3").setCellRenderer(new ButtonRenderer());
        table.getColumn("Column 3").setCellEditor(new ButtonEditor(new JCheckBox()));
        scrollPane=new JScrollPane(table);
        topPanel.add(scrollPane,BorderLayout.CENTER);  

        button.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent event){
                JOptionPane.showMessageDialog(null,"Button Clicked in JTable Cell");
            }
        });
    }

    class ButtonRenderer extends JButton implements TableCellRenderer {
        public ButtonRenderer() {
            //setOpaque(true);
        }

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

    class ButtonEditor extends DefaultCellEditor {
        private String label;

        public ButtonEditor(JCheckBox checkBox) {
            super(checkBox);
        }

        public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
            label = (value == null) ? "" : value.toString();
            button.setText(label);
            return button;
        }

        public Object getCellEditorValue() {
            return new String(label);
        }
    }

    public class myTableModel extends DefaultTableModel {
        String dat;
        JButton button=new JButton("");

        myTableModel(String tname){
            super(dataValues,columnNames);
            dat=tname;
        }

        public boolean isCellEditable(int row,int cols){
            if( dat=="owntable"){
                if(cols==0){return false;}
            }
            return true;
        }
    }         

    public static void main(String args[]){
        ButtonInJTable mainFrame=new ButtonInJTable();
        mainFrame.setVisible(true);
    }         
}

我仍然完全不理解这段代码所以我只想问几个问题：

这是什么意思？

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

和此：

    public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
                label = (value == null) ? "" : value.toString();
                button.setText(label);
                return button;
        }

为什么要有checkbox？

public ButtonEditor(JCheckBox checkBox) {
            super(checkBox);
        }

根据上面的代码，我如何为不同的按钮单独actionlistener？

谢谢你的任何答案：）