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JTable を使用して特定のセルの色を変更するメソッドに問題がありますが、すべてのセルの色が変わります。

これは私が実装しようとしている方法です:

public Component cellBG(JTable table, int row, int column)
{
    TableCellRenderer renderer = table.getCellRenderer(row, column);
    Component c = table.prepareRenderer(renderer, row, column);

    Object steak = table.getValueAt(row,column);

    if(((String) steak).startsWith("+"))
    {
       c.setBackground(Color.GREEN);
    }
    else if(((String) steak).startsWith("-"))
    {
        c.setBackground(Color.RED);
    }
    else if(((String) steak).startsWith("~"))
    {
        c.setBackground(Color.YELLOW);
    }
    else if(((String) steak).equals(""))
    {
        c.setBackground(Color.WHITE);
    }

    return c;

}

私のテーブルには、+、-、~、または " " のいずれかを含む 8 行の 10 列が含まれています。これにより、さまざまな色の散らばったパターンが発生するはずですが、最後に読み取られたエントリでは、テーブルは単色で表示されます。

要求ごとに SSCCE を要求する

import java.awt.Component;
import java.awt.EventQueue;
import java.awt.Color;
import java.awt.Font;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JFrame;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;

public class ptf_viewer extends JFrame {

    static JTable table;
    static DefaultTableModel model;

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    ptf_viewer frame = new ptf_viewer();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }); 
    }

    public ptf_viewer(){
    getContentPane().setBackground(Color.WHITE);
    setTitle("Portable test file viewing");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(50, 50, 1024, 768);
    getContentPane().setLayout(null);

    final String[] columnNames = {"Test 1", "Test 2", "Test 3", "Test 4", "Test 5", "Test 6", "Test 7", "Test 8", "Test 9", "Test 10"};
    final Object[][] data = {
                {"+","+","","","","~","","","",""},
                {"-","+","","","","","","","",""},
                {"+","+","","","~","","","","",""},
                {"+","+","","","","","~","","",""},
                {"+","-","","~","","","","","",""},
                {"+","-","","","","","","","",""},
                {"+","-","","","","","","","",""},
                {"-","+","~","","","","","","","+"}
    };
    model = new DefaultTableModel(data, columnNames);
    table = new JTable(data, columnNames);
    table.setModel(model);
    for(int i = 0 ; i < 8 ; i++){
            cellBG(table, i, 9);
    }
    JTableHeader header = table.getTableHeader();
    header.setFont(new Font("Times New Roman", Font.BOLD, 13));
    header.setBackground(Color.black);
    header.setForeground(Color.white);

    JScrollPane scrollPane = new JScrollPane(table);
    scrollPane.setSize(988, 618);
    scrollPane.setFont(new Font("Times New Roman", Font.BOLD, 13));
    scrollPane.setLocation(10, 60);
    getContentPane().add(scrollPane);
    }
    public Component cellBG(JTable table, int row, int column)
    {
        TableCellRenderer renderer = table.getCellRenderer(row, column);
        Component c = table.prepareRenderer(renderer, row, column);

        Object bøf = table.getValueAt(row,column);

        if(((String) bøf).startsWith("+"))
        {
           c.setBackground(Color.GREEN);
        }
        else if(((String) bøf).startsWith("-"))
        {
            c.setBackground(Color.RED);
        }
        else if(((String) bøf).startsWith("~"))
        {
            c.setBackground(Color.YELLOW);
        }
        else if(((String) bøf).equals(""))
        {
            c.setBackground(Color.WHITE);
        }
        return c;
    }
    }
4

2 に答える 2

3

abbisDK が書きました - SSCCE が作成し、質問に追加しました。

  • DefaultTableCellRendererandを使用して確認しPattern.compileます (さまざまな方法の 1 つ、Strin.equals() または String.startWith、contains は別の非常に簡単な方法です)。

  • 同じなので、非常によく似たコードを次の目的で使用できます。prepareRenderer

. 

table = new JTable(data, columnNames) {
   //logics place for prepareRenderer
};

ここに画像の説明を入力

コードから

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.util.regex.Pattern;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumn;

public class Ptf_Viewer {

    private JFrame frame = new JFrame("Portable test file viewing");
    private JTable table;
    private final String[] columnNames = {"Test 1", "Test 2", "Test 3", "Test 4",
        "Test 5", "Test 6", "Test 7", "Test 8", "Test 9", "Test 10"};
    private final Object[][] data = {
        {"+", "+", "", "", "", "~", "", "", "", ""},
        {"-", "+", "", "", "", "", "", "", "", ""},
        {"+", "+", "", "", "~", "", "", "", "", ""},
        {"+", "+", "", "", "", "", "~", "", "", ""},
        {"+", "-", "", "~", "", "", "", "", "", ""},
        {"+", "-", "", "", "", "", "", "", "", ""},
        {"+", "-", "", "", "", "", "", "", "", ""},
        {"-", "+", "~", "", "", "", "", "", "", "+"}
    };
    private DefaultTableModel model = new DefaultTableModel(data, columnNames);

    public Ptf_Viewer() {
        table = new JTable(data, columnNames) {
            //logics place for prepareRenderer
        };
        table.setModel(model);
        table.setPreferredScrollableViewportSize(
                new Dimension(800, table.getPreferredSize().height));
        JTableHeader header = table.getTableHeader();
        header.setFont(new Font("Times New Roman", Font.BOLD, 13));
        header.setBackground(Color.black);
        header.setForeground(Color.white);
        for (int i = 0; i < table.getColumnCount(); i++) {
            RowColorRenderer rowRenderer = new RowColorRenderer(i);
            TableColumn column = table.getColumnModel().getColumn(i);
            column.setCellRenderer(rowRenderer);
        }
        JScrollPane scrollPane = new JScrollPane(table);
        scrollPane.setFont(new Font("Times New Roman", Font.BOLD, 13));
        frame.add(scrollPane);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocation(50, 50);
        frame.pack();
        frame.setVisible(true);
    }

    private class RowColorRenderer extends DefaultTableCellRenderer {

        private static final long serialVersionUID = 1L;
        private int colNo = 0;

        RowColorRenderer(int col) {
            colNo = col;
        }

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value,
                boolean isSelected, boolean hasFocus, int row, int column) {
            Component comp = super.getTableCellRendererComponent(table, value,
                    isSelected, hasFocus, row, column);
            JComponent jc = (JComponent) comp;
            if (!isSelected) {
                if (table.getValueAt(row, colNo) != null) {
                    String str = table.getValueAt(row, colNo).toString();
                    if (!str.isEmpty()) {
                        if ((Pattern.compile("[+]").matcher(str).find())) {
                            setForeground(Color.magenta);
                            setBackground(Color.GREEN);
                            setFont(new Font("Serif", Font.BOLD, 16));
                            setHorizontalAlignment(CENTER);
                        } else if ((Pattern.compile("[-]").matcher(str).find())) {
                            setForeground(Color.blue);
                            setBackground(Color.RED);
                            setFont(new Font("Serif", Font.BOLD, 16));
                            setHorizontalAlignment(CENTER);
                        } else if ((Pattern.compile("[~]").matcher(str).find())) {
                            setForeground(Color.red);
                            setBackground(Color.YELLOW);
                            setFont(new Font("Serif", Font.BOLD, 16));
                            setHorizontalAlignment(CENTER);
                        } else {
                            setBackground(Color.WHITE);
                            setForeground(table.getForeground());
                            setFont(new Font("Serif", Font.PLAIN, 12));
                            setHorizontalAlignment(CENTER);
                        }
                    } else {
                        setBackground(Color.WHITE);
                        setForeground(table.getForeground());
                    }
                }
            }
            return this;
        }
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                Ptf_Viewer frame = new Ptf_Viewer();
            }
        });
    }
}
于 2013-07-31T13:38:48.260 に答える