Jtable具有不同类型的单元格，具体取决于数据类型 [英] Jtable with different types of cells depending on data type

问题描述

如何根据特定行显示的输入类型实现具有不同类型单元格编辑器的JTable？

How can I implement a JTable with different types of cell editors depending on the type of input a particular row is displaying?

例如

• 某些行可能是复选框（对于布尔类型）


• 某些行可能是组合框（如果我想提供修复的话）一组可供选择的选项）


• 某些行可能是文本字段（如果我允许任意数据）。

目前我已经实现了 AbstractTableModel ，它从我的对象中获取一组自定义字段对象，并向表中添加行。我想通过设置特定类型的单元格来进一步自定义我的表格。我可以根据行包含的字段类型确定要使用的单元格类型。

Currently I have implemented the AbstractTableModel, which takes a set of custom field objects from my object and adds rows to the table. I would like to further customize my table by setting specific types of cells. I can determine which cell type to use based on the type of field that row contains.

表模型是在运行时动态创建的。

The table model is dynamically created at run-time.

推荐答案

• 某些行可能是复选框（对于布尔类型）


• 某些行可能是组合框（如果我想提供一组固定的选项供选择）


• 某些行可能是文本字段（如果我允许任意数据）。

例如

import java.awt.EventQueue;
import java.util.Date;
import javax.swing.JFrame;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;


public class EachRowRendererEditor {

    private JFrame frame = new JFrame("EachRowRendererEditor");
    private  String[] columnNames = {"Type", "Value"};
    private     Object[][] data = {
            {"String", "I'm a string"},
            {"Date", new Date()},
            {"Integer", new Integer(123)},
            {"Double", new Double(123.45)},
            {"Boolean", Boolean.TRUE}};
   private  JScrollPane scrollPane;
   private  JTable table;

    public EachRowRendererEditor() {
        table = new JTable(data, columnNames) {

            private static final long serialVersionUID = 1L;
            private Class editingClass;

            @Override
            public TableCellRenderer getCellRenderer(int row, int column) {
                editingClass = null;
                int modelColumn = convertColumnIndexToModel(column);
                if (modelColumn == 1) {
                    Class rowClass = getModel().getValueAt(row, modelColumn).getClass();
                    return getDefaultRenderer(rowClass);
                } else {
                    return super.getCellRenderer(row, column);
                }
            }

            @Override
            public TableCellEditor getCellEditor(int row, int column) {
                editingClass = null;
                int modelColumn = convertColumnIndexToModel(column);
                if (modelColumn == 1) {
                    editingClass = getModel().getValueAt(row, modelColumn).getClass();
                    return getDefaultEditor(editingClass);
                } else {
                    return super.getCellEditor(row, column);
                }
            }
            //  This method is also invoked by the editor when the value in the editor
            //  component is saved in the TableModel. The class was saved when the
            //  editor was invoked so the proper class can be created.

            @Override
            public Class getColumnClass(int column) {
                return editingClass != null ? editingClass : super.getColumnClass(column);
            }
        };
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        scrollPane = new JScrollPane(table);
        frame.add(scrollPane);
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                EachRowRendererEditor eeee = new EachRowRendererEditor();
            }
        });
    }
}

这篇关于Jtable具有不同类型的单元格，具体取决于数据类型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！