JavaGUI SwingでTable

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ひな形(削除ボタンとスクロールバーが付いた長いテーブル) †

package com.snail.gui;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import java.util.Vector;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;


public final class TableExam extends JFrame implements ActionListener {
  private static final long serialVersionUID = 8317897946759086742L;
  private ReadOnlyTable table;
  private JButton delButton = new JButton("削除");

  public TableExam() {
    // テーブル作成
    Vector<String> colIndex = new Vector<String>();
    Vector<Vector> row = new Vector<Vector>();

    for (int colNum = 0; colNum < 2; colNum++) {
      colIndex.add(colNum + "列");
    }

    for (int rowNum = 0; rowNum < 10000; rowNum++) {
      Vector<String> col = new Vector<String>();

      for (int colNum = 0; colNum < colIndex.size(); colNum++) {
        col.add(rowNum + "行" + colNum + "列");
      }

      row.add(col);
    }

    table = new ReadOnlyTable(row, colIndex);

    JScrollPane scrollPane = new JScrollPane(table);
    scrollPane.setPreferredSize(new Dimension(200, 300));

    this.getContentPane().add(scrollPane, BorderLayout.NORTH);

    // 削除ボタン
    JPanel buttonPanel = new JPanel();
    buttonPanel.setLayout(new FlowLayout());
    buttonPanel.add(delButton);

    this.getContentPane().add(buttonPanel, BorderLayout.SOUTH);

    delButton.addActionListener(this);
  }

  public static void main(String[] args) {
    JFrame jFrame = new TableExam();
    jFrame.setBounds(10, 10, 300, 500);
    jFrame.setVisible(true);
  }

  public void actionPerformed(ActionEvent event) {
    int[] selectedRows = table.getSelectedRows();
    int delRows = 0;

    for (int cnt = 0; cnt < selectedRows.length; cnt++) {
      System.out.println("DEL:" +
                         table.getValueAt(selectedRows[cnt] - delRows, 0));

      DefaultTableModel tblModel = (DefaultTableModel) table.getModel();
      tblModel.removeRow(selectedRows[cnt] - delRows);
      delRows++;
    }
  }
}


class ReadOnlyTable extends JTable {
  private static final long serialVersionUID = 5036129394555899969L;

  public ReadOnlyTable(Vector row, Vector col) {
    super(row, col);
    this.getTableHeader().setReorderingAllowed(false); //列の入れ替えを禁止
  }

  public boolean isCellEditable(int rowIndex, int colmunIndex) {
    return false; // 編集は禁止
  }

  public Component prepareRenderer(TableCellRenderer renderer, int row,
                                   int column) {
    Component c = super.prepareRenderer(renderer, row, column);

    // 一列名は青、二列名は赤で表示
    switch (column) {
    case 0:
      c.setForeground(Color.BLUE);

      break;

    case 1:
      c.setForeground(Color.RED);

      break;

    default:
      c.setForeground(Color.BLACK);
    }

    return c;
  }
}

実行結果 †

参考文献 †

1. てんぷらメモ,http://terai.xrea.jp/FrontPage.html

Java#GUI