(Swing) 在JTable中实现复选框

最新推荐文章于 2021-02-16 09:48:05 发布

wzh32

最新推荐文章于 2021-02-16 09:48:05 发布

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文章标签： swing table object button null import

本文介绍如何在Swing的JTable中自定义单元格渲染器和编辑器以实现复选框功能。通过创建CheckBoxRenderer和CheckButtonEditor类，可以实现在表格中的每一行末尾添加一个可编辑的复选框。

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最近要采用swing写程序遇到了这个问题，在网上搜了一些方法，经过多次努力，终于实现，将调试通过的代码拿出来分享，希望有用啊

主要由三个文件：CheckBoxRenderer.java CheckButtonEditor.java CheckboxTable.java

1、CheckBoxRenderer.java

import java.awt.Component;

import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;

class   CheckBoxRenderer   implements   TableCellRenderer{

public Component getTableCellRendererComponent(JTable table, Object value,
                                                 boolean isSelected,
                                                 boolean hasFocus, int row,
                                                 int column) {
    if (value == null)return null;
    return (Component) value;
}
}

2、CheckButtonEditor.java

import java.awt.Component;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.DefaultCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JTable;

class CheckButtonEditor extends    DefaultCellEditor
implements ItemListener {
private JCheckBox button;

public CheckButtonEditor(JCheckBox checkBox) {
    super(checkBox);
}

public Component getTableCellEditorComponent(JTable table, Object value,
                                               boolean isSelected, int row,
                                               int column) {
    if (value == null)return null;
    button = (JCheckBox) value;
    button.addItemListener(this);
    return (Component) value;
}

public Object getCellEditorValue() {
    button.removeItemListener(this);
    return button;
}

public void itemStateChanged(ItemEvent e) {
    super.fireEditingStopped();
}
}

3、CheckboxTable.java

import java.awt.Dimension;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JFrame.*;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.event.TableModelEvent;
import javax.swing.table.DefaultTableModel;
import com.borland.jbcl.layout.*;

public class CheckboxTable implements MouseListener{
JTable table = new JTable();
XYLayout xYLayout1 = new XYLayout();
public CheckboxTable() {
    JFrame frame = new JFrame("Table");
    table = this.gettable();
    table.addMouseListener(this);
    JScrollPane src = new JScrollPane(table);
    frame.getContentPane().add(src);
    frame.setSize(new Dimension(400, 200));
    frame.setVisible(true);
}

public JTable gettable() {
    DefaultTableModel dm = new DefaultTableModel();
    dm.setDataVector(
        new Object[][] { {"(1,1)", "(1,2)", "(1,3)", "(1,4)", "(1,5)", new JCheckBox("1")},
                         {"(2,1)", "(2,2)", "(2,3)", "(2,4)", "(2,5)", new JCheckBox("2")},
                         {"(3,1)", "(3,2)", "(3,3)", "(3,4)", "(3,5)", new JCheckBox("3")},
                       },
        new Object[] {"第1列", "第2列", "第3列", "第4列", "第5列", "选取"});

    JTable table = new JTable(dm) {
      public void tableChanged(TableModelEvent e) {
        super.tableChanged(e);
        repaint();
      }
    };
    table.getColumn("选取").setCellEditor(new CheckButtonEditor(new JCheckBox()));
    table.getColumn("选取").setCellRenderer(new CheckBoxRenderer());

    return table;
}

public static void main(String args[]) {
    new CheckboxTable();
}

public void mouseClicked(MouseEvent arg0) {
    // TODO Auto-generated method stub

}

public void mouseEntered(MouseEvent arg0) {
    // TODO Auto-generated method stub

}

public void mouseExited(MouseEvent arg0) {
    // TODO Auto-generated method stub

}

public void mousePressed(MouseEvent arg0) {
    // TODO Auto-generated method stub

}

public void mouseReleased(MouseEvent arg0) {
    // TODO Auto-generated method stub

}
}