[英]add JButton after last row of JTable
我搜索答案已有一段时间,但大多数情况与我的不同。
我想直接在表的最后一行之后添加一个JButton,该表是动态的并且位于scrollPane内部。
几乎所有其他问题都通过在BorderLayout.South中的scrollPane之后添加的按钮来回答,这不是我想要的。
谢谢
更新了图片以更好地表示它,该按钮应该出现在scrollPane的最后一行之后。
阅读有关不同LayoutManager
的更多信息。 使用适当的管理器或它们的组合。
这是简单的示例:
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
public class TestFrame extends JFrame {
public TestFrame() {
init();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
private void init() {
JTable t = new JTable(3,3);
add(new JScrollPane(t));
JPanel btns = new JPanel(new FlowLayout(FlowLayout.LEFT,0,0));
JButton jButton = new JButton("here");
btns.add(jButton);
add(btns,BorderLayout.SOUTH);
}
public static void main(String args[]) {
new TestFrame();
}
}
编辑:
尝试使用下一个示例:
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
public class TestFrame extends JFrame {
public TestFrame() {
init();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
private void init() {
JTable t = new JTable(new DefaultTableModel(3,3){
@Override
public boolean isCellEditable(int row, int column) {
if(row == getRowCount()-1 && column != 0){
return false;
}
return super.isCellEditable(row, column);
}
});
t.setGridColor(t.getTableHeader().getBackground());
add(new JScrollPane(t));
for(int i=0;i<3;i++)
t.getColumnModel().getColumn(i).setCellRenderer(getDummyRenderer());
t.getColumnModel().getColumn(0).setCellEditor(getDummyEditor());
}
private TableCellEditor getDummyEditor() {
return new DummyEditor();
}
private TableCellRenderer getDummyRenderer() {
return new DefaultTableCellRenderer() {
@Override
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
if(row == table.getRowCount()-1){
if(column == 0){
return new JButton("dummy");
} else {
JLabel jLabel = new JLabel("");
jLabel.setOpaque(true);
jLabel.setBorder(null);
return jLabel;
}
} else {
Component tableCellRendererComponent = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
return tableCellRendererComponent;
}
}
};
}
public static void main(String args[]) {
new TestFrame();
}
private class DummyEditor extends DefaultCellEditor implements TableCellEditor{
private JButton btn = new JButton("dummy");
public DummyEditor(){
super(new JTextField());
btn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("clicked");
}
});
}
@Override
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column) {
return row == table.getRowCount()-1 ? btn : super.getTableCellEditorComponent(table, value, isSelected, row, column);
}
}
}
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