java – 如何在JTable单元格中设置图标？
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我想在Jtable的单元格中添加图像Icon.我有一个如下所述的代码.我该怎么办？
package com.orb;
private final LinkedList<Product> list= new LinkedList<Product>();
private final LinkedList<Boolean> checkList = new LinkedList<Boolean>();
public void addItem(Product customer) {
list.add(customer);
checkList.add(false);
checkList.remove(true);
fireTableDataChanged();
}
@Override
public int getColumnCount() {
return 6;
}
@Override
public int getRowCount() {
return list.size();
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
Object obj = null;
if(columnIndex==4){
setTotal(list.get(rowIndex));
}
switch (columnIndex){
case 0: obj= list.get(rowIndex).getCode() ;break;
case 1: obj=list.get(rowIndex).getDescription(); break;
case 2: obj=list.get(rowIndex).getQuantity();break;
case 3: obj=list.get(rowIndex).getPrice();break;
case 4: obj=list.get(rowIndex).getTotal();break;
}
return obj;
}
@Override
public Class<?> getColumnClass(int arg0) {
switch(arg0){
case 0: case 1: return String.class;
case 2: return Integer.class;
case 3: case 4: return Double.class;
//case 5: return ImageIcon.class;
}
return super.getColumnClass(arg0);
}
@Override
public boolean isCellEditable(int arg0, int arg1) {
boolean isCellEditable = false;
switch(arg1){
case 2: case 3: isCellEditable= true;break;
default: isCellEditable= false;break;
}
return isCellEditable;
//return super.isCellEditable(arg0, arg1);
}
@Override
public void setValueAt(Object arg0, int arg1, int arg2) {
System.out.println("Value seted" +arg0 + arg1 + arg2);
switch(arg2){
case 0: break;
case 1: break;
case 2: list.get(arg1).setQuantity((Integer)arg0); setTotal(list.get(arg1)); break;
case 3: list.get(arg1).setPrice((Double)arg0); setTotal(list.get(arg1));break;
case 4: list.get(arg1).setTotal((Double)arg0);break;
//case 0: checkList.set(arg1, (Boolean)arg0);break;
default:break;
}
fireTableDataChanged();
}
public LinkedList<Product> getList() {
LinkedList<Product> temp = new LinkedList<Product>();
int index=-1;
for(Boolean isSelected:checkList){
index++;
if(isSelected){
temp.add(list.get(index));
}
}
return temp;
}
public void deleteRow(int rowNubmer)
{
list.remove(rowNubmer);
fireTableDataChanged();
}
public void setTotal(Product product){
Double total = 0.0d;
total = product.getQuantity ()* product.getPrice();
product.setTotal(total);
}
@Override
public void fireTableDataChanged() {
super.fireTableDataChanged();
}
我有一个像上面这样的桌子模型.我想在表格单元格中添加图像图标,并希望在按下该图标时删除单元格.我该怎么做这个代码？
请给我完整的描述.
解决方法:
您可以使用由JLabel支持的DefaltTableCellRenderer,然后您可以使用它来设置图标.
最好的解决方案是扩展DefaltTableCellRenderer并覆盖getTableCellRendererComponent方法,并按单元格需要在单元格上应用图标
您可以通过为给定的类类型定义默认渲染器或直接为列应用渲染器
特别查看How to Use JTables和Using Custom Renderers
用例子更新
这是一种方法,还有更多……
public class TestTable {
public static void main(String[] args) {
new TestTable();
}
public TestTable() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
JTable table = new JTable();
table.setGridColor(Color.LIGHT_GRAY);
table.setShowGrid(true);
table.setShowHorizontalLines(true);
table.setShowVerticalLines(true);
table.setModel(new TestTableModel());
table.getColumn("X").setCellRenderer(new DeleteCellRenderer());
table.getColumn("X").setCellEditor(new DeleteCellEditor());
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new JScrollPane(table));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
protected class TestTableModel extends AbstractTableModel {
private List<RowData> rowData;
public TestTableModel() {
rowData = new ArrayList<RowData>(25);
for (int index = 0; index < 10; index++) {
rowData.add(new RowData(index));
}
}
@Override
public String getColumnName(int column) {
return column == 0 ? "Text" : "X";
}
@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
RowData rd = rowData.get(rowIndex);
return rd.isDeletable();
}
@Override
public int getRowCount() {
return rowData.size();
}
@Override
public int getColumnCount() {
return 2;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
RowData rd = rowData.get(rowIndex);
return columnIndex == 0 ? rd.getText() : rd.isDeletable();
}
@Override
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
RowData rd = rowData.get(rowIndex);
if (columnIndex == 1) {
if (aValue instanceof Boolean && (Boolean)aValue) {
rowData.remove(rd);
fireTableRowsDeleted(rowIndex, rowIndex);
}
}
}
}
public class RowData {
private String text;
private boolean deletable;
public RowData(int row) {
text = "Row " + row;
deletable = Math.round(Math.random() * 1) == 0;
}
public String getText() {
return text;
}
public boolean isDeletable() {
return deletable;
}
}
public class DeleteCellRenderer extends DefaultTableCellRenderer {
public DeleteCellRenderer() {
try {
BufferedImage img = ImageIO.read(getClass().getResource("/Delete.png"));
setIcon(new ImageIcon(img));
} catch (IOException ex) {
ex.printStackTrace();
}
}
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
setText(null);
if (value instanceof Boolean && (Boolean)value) {
setEnabled(true);
} else {
setEnabled(false);
}
return this;
}
}
public class DeleteCellEditor extends AbstractCellEditor implements TableCellEditor {
private JLabel label;
public DeleteCellEditor() {
label = new JLabel("Delete");
}
@Override
public Object getCellEditorValue() {
return true;
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
stopCellEditing();
}
});
return label;
}
@Override
public boolean isCellEditable(EventObject e) {
return true;
}
}
}
更新
为什么不使用JButton / TableCellEditor？ Here’s why
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