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Java Swing - 如何当鼠标光标在JTable的单元格中时显示弹出菜单

jtable 【jtable】
我们想知道如何当鼠标光标在JTable的单元格中时显示弹出菜单。
代码展示 运行结果 
import java.awt.Component;

import javax.swing.JComponent;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;

public class Main {
  public static void main(String[] args) {
    JTable t = new JTable(new TimesTableModel());
    t.setDefaultRenderer(Object.class, new TimesTableRenderer());
    JOptionPane.showMessageDialog(null, t);
  }
}

class TimesTableRenderer extends DefaultTableCellRenderer {
  @Override
  public Component getTableCellRendererComponent(JTable table, Object value,
      boolean isSelected, boolean hasFocus, int row, int column) {

    Component c = super.getTableCellRendererComponent(table, value, isSelected,
        hasFocus, row, column);
    JComponent jc = (JComponent) c;
    jc.setToolTipText((row + 1) + "x" + (column + 1) + "="
        + ((row + 1) * (column + 1)));
    return jc;
  }
}

class TimesTableModel extends DefaultTableModel {
  @Override
  public int getColumnCount() {
    return 7;
  }

  @Override
  public int getRowCount() {
    return 5;
  }

  @Override
  public Object getValueAt(int row, int column) {
    return new Integer((row + 1) * (column + 1));
  }
}