我知道你可以创建一个表格并将JTree添加为列。但是我想做的完全相反。
查看图片并告诉我是否可能。谢谢!
更新:
通过使用MKorbel的代码,并使用以下代码随机化列数:
@Override
public int getColumnCount() {
int i = (int) (Math.random( )* 10.0);
if (i%2 ==0)
return 2;
else
return 3;
}
我能够获得以下图像:
我知道你可以创建一个表格并将JTree添加为列。但是我想做的完全相反。
查看图片并告诉我是否可能。谢谢!
更新:
通过使用MKorbel的代码,并使用以下代码随机化列数:
@Override
public int getColumnCount() {
int i = (int) (Math.random( )* 10.0);
if (i%2 ==0)
return 2;
else
return 3;
}
1)我不知道该如何在 Renderer
和 Editor
中解决 isLeaf()
2)如果我直接将带有 JTable
的 JScrollPane
放到 Node
中(不使用 JPanel
作为 parent
),则在启动后 JTree View
渲染不正确,更多信息请参见我的问题Put JTable in the JTree
import java.awt.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.tree.*;
public class TreeWithTableRenderer extends JFrame {
private static final long serialVersionUID = 1L;
private JTree tree;
public TreeWithTableRenderer() {
DefaultMutableTreeNode AA1 = new DefaultMutableTreeNode("AA1");
DefaultMutableTreeNode AA2 = new DefaultMutableTreeNode("AA2");
DefaultMutableTreeNode A = new DefaultMutableTreeNode("A");
A.add(AA1);
A.add(AA2);
DefaultMutableTreeNode BB1 = new DefaultMutableTreeNode("BB1");
DefaultMutableTreeNode BB2 = new DefaultMutableTreeNode("BB2");
DefaultMutableTreeNode B = new DefaultMutableTreeNode("B");
B.add(BB1);
B.add(BB2);
DefaultMutableTreeNode CC1 = new DefaultMutableTreeNode("CC1");
DefaultMutableTreeNode CC2 = new DefaultMutableTreeNode("CC2");
DefaultMutableTreeNode C = new DefaultMutableTreeNode("C");
C.add(CC1);
C.add(CC2);
DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
root.add(A);
root.add(B);
root.add(C);
tree = new JTree(root);
tree.setCellRenderer(new MyTableInTreeCellRenderer());
tree.setRowHeight(0);
JScrollPane jsp = new JScrollPane(tree);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
add(jsp, BorderLayout.CENTER);
pack();
setLocationRelativeTo(null);
}
class MyTableInTreeCellRenderer extends JPanel implements TreeCellRenderer {
private static final long serialVersionUID = 1L;
private JTable table;
public MyTableInTreeCellRenderer() {
super(new BorderLayout());
table = new JTable();
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane);
}
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
final String v = (String) ((DefaultMutableTreeNode) value).getUserObject();
table.setModel(new DefaultTableModel() {
private static final long serialVersionUID = 1L;
@Override
public int getRowCount() {
return 2;
}
@Override
public int getColumnCount() {
return 2;
}
@Override
public Object getValueAt(int row, int column) {
return v + ":" + row + ":" + column;
}
});
table.setPreferredScrollableViewportSize(table.getPreferredSize());
return this;
}
}
public static void main(String[] args) throws Exception {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new TreeWithTableRenderer().setVisible(true);
}
});
}
}