MainPanel.java

// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@

package example;

import java.awt.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;

public final class MainPanel extends JPanel {
  private MainPanel() {
    super(new BorderLayout());
    RowDataModel model = new RowDataModel();
    JTable table = new JTable(model) {
      private final Color evenColor = new Color(0xFA_FA_FA);
      @Override public Component prepareRenderer(TableCellRenderer tcr, int row, int column) {
        Component c = super.prepareRenderer(tcr, row, column);
        if (isRowSelected(row)) {
          c.setForeground(getSelectionForeground());
          c.setBackground(getSelectionBackground());
        } else {
          c.setForeground(getForeground());
          c.setBackground(row % 2 == 0 ? evenColor : getBackground());
        }
        return c;
      }
    };

    TableColumn col = table.getColumnModel().getColumn(0);
    col.setMinWidth(60);
    col.setMaxWidth(60);
    col.setResizable(false);

    model.addRowData(new RowData("Name 1", "comment..."));
    model.addRowData(new RowData("Name 2", "Test"));
    model.addRowData(new RowData("Name d", "ee"));
    model.addRowData(new RowData("Name c", "Test cc"));
    model.addRowData(new RowData("Name b", "Test bb"));
    model.addRowData(new RowData("Name a", "ff"));
    model.addRowData(new RowData("Name 0", "Test aa"));

    table.setAutoCreateRowSorter(true);
    table.setFillsViewportHeight(true);
    table.setComponentPopupMenu(new TablePopupMenu());
    add(new JScrollPane(table));
    setPreferredSize(new Dimension(320, 240));
  }

  public static void main(String[] args) {
    EventQueue.invokeLater(MainPanel::createAndShowGui);
  }

  private static void createAndShowGui() {
    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (UnsupportedLookAndFeelException ignored) {
      Toolkit.getDefaultToolkit().beep();
    } catch (ClassNotFoundException | InstantiationException | IllegalAccessException ex) {
      ex.printStackTrace();
      return;
    }
    JFrame frame = new JFrame("@title@");
    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    frame.getContentPane().add(new MainPanel());
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  }
}

class RowDataModel extends DefaultTableModel {
  private static final ColumnContext[] COLUMN_ARRAY = {
      new ColumnContext("No.", Integer.class, false),
      new ColumnContext("Name", String.class, true),
      new ColumnContext("Comment", String.class, true)
  };
  private int number;

  public void addRowData(RowData t) {
    Object[] obj = {number, t.getName(), t.getComment()};
    super.addRow(obj);
    number++;
  }

  @Override public boolean isCellEditable(int row, int col) {
    return COLUMN_ARRAY[col].isEditable;
  }

  @Override public Class<?> getColumnClass(int column) {
    return COLUMN_ARRAY[column].columnClass;
  }

  @Override public int getColumnCount() {
    return COLUMN_ARRAY.length;
  }

  @Override public String getColumnName(int column) {
    return COLUMN_ARRAY[column].columnName;
  }

  private static class ColumnContext {
    public final String columnName;
    public final Class<?> columnClass;
    public final boolean isEditable;

    protected ColumnContext(String columnName, Class<?> columnClass, boolean isEditable) {
      this.columnName = columnName;
      this.columnClass = columnClass;
      this.isEditable = isEditable;
    }
  }
}

class RowData {
  private final String name;
  private final String comment;

  protected RowData(String name, String comment) {
    this.name = name;
    this.comment = comment;
  }

  // public void setName(String str) {
  //   name = str;
  // }

  // public void setComment(String str) {
  //   comment = str;
  // }

  public String getName() {
    return name;
  }

  public String getComment() {
    return comment;
  }
}

final class TablePopupMenu extends JPopupMenu {
  private final JMenuItem delete;

  /* default */ TablePopupMenu() {
    super();
    add("add").addActionListener(e -> {
      JTable table = (JTable) getInvoker();
      RowDataModel model = (RowDataModel) table.getModel();
      model.addRowData(new RowData("New row", ""));
      Rectangle r = table.getCellRect(model.getRowCount() - 1, 0, true);
      table.scrollRectToVisible(r);
    });
    addSeparator();
    delete = add("delete");
    delete.addActionListener(e -> {
      JTable table = (JTable) getInvoker();
      DefaultTableModel model = (DefaultTableModel) table.getModel();
      int[] selection = table.getSelectedRows();
      for (int i = selection.length - 1; i >= 0; i--) {
        model.removeRow(table.convertRowIndexToModel(selection[i]));
      }
    });
  }

  @Override public void show(Component c, int x, int y) {
    if (c instanceof JTable) {
      delete.setEnabled(((JTable) c).getSelectedRowCount() > 0);
      super.show(c, x, y);
    }
  }
}