[英]JTable colors all cells and not only the specific cell
我對應該更改一個特定單元格(例如JTable)顏色的方法有疑問,但是所有單元格都會更改顏色。
這是我嘗試實現的方法:
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;
}
我的表格包含10列和8行,所有行都包含+,-,〜或“”,這會導致散亂的圖案,並且顏色不同,但是表格的顏色在讀取的最后一個entri中為實心。
屁股按要求
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;
}
}
abbisDK寫道-SSCCE提出並添加到問題中,
通過使用DefaultTableCellRenderer
和Pattern.compile
進行查看(多種方式之一,Strin.equals()或String.startWith,包含另一種且非常簡單)
一樣,因此非常相似的代碼可以用於prepareRenderer
。
table = new JTable(data, columnNames) {
//logics place for prepareRenderer
};
從代碼
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();
}
});
}
}
您將需要創建自己的單元格渲染器,並使其根據單元格中包含的文本返回正確的背景色。
public class MyTableCellRenderer extends DefaultTableCellRenderer {
@Override
public Color getBackground() {
String steak = getText();
if (steak.startsWith("+")) {
return Color.GREEN;
} else if (steak.startsWith("-")) {
return Color.RED;
} else if (steak.startsWith("~")) {
return Color.YELLOW;
} else if (steak.equals("")) {
return Color.WHITE;
}
return super.getBackground();
}
}
}
並確保您的表使用它。
table.setDefaultRenderer(String.class, new MyTableCellRenderer());
假設這里所有單元格的類型都是String
。
在SSCCE之后編輯:該類是Obejct
而不是String
,請使用
table.setDefaultRenderer(Object.class, new MyTableCellRenderer());
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