Я хочу показать университетскую систему от JTree, но я не могу поместить папки в папки. Так что это проблема!
Как я могу решить эту проблему?
import javax.swing.*;
import javax.swing.JFrame;
import javax.swing.JTree;
import javax.swing.SwingUtilities;
import javax.swing.tree.DefaultMutableTreeNode;
public class MyClass extends JFrame
{
JFrame frame = new JFrame("JTree Frame");
private JTree tree;
public MyClass()
{
DefaultMutableTreeNode Universities = new DefaultMutableTreeNode("Universities");
/* Universities */
DefaultMutableTreeNode European = new DefaultMutableTreeNode("European University");
DefaultMutableTreeNode French = new DefaultMutableTreeNode("French University");
DefaultMutableTreeNode American = new DefaultMutableTreeNode("American University");
DefaultMutableTreeNode Bryusov = new DefaultMutableTreeNode("Bryusov University");
/* Departments */
DefaultMutableTreeNode Business_Management = new DefaultMutableTreeNode("Business_Management");
DefaultMutableTreeNode Economics_and_Management = new DefaultMutableTreeNode("Economics_and_Management");
DefaultMutableTreeNode Information_technology = new DefaultMutableTreeNode("Information_technology");
DefaultMutableTreeNode International_Relation = new DefaultMutableTreeNode("International_Relation");
DefaultMutableTreeNode Linguistics = new DefaultMutableTreeNode("Linguistics");
DefaultMutableTreeNode Tourism = new DefaultMutableTreeNode("Tourism");
DefaultMutableTreeNode European_Criminal_Law_Section = new DefaultMutableTreeNode("European_Criminal_Law_Section");
/* Subjects */
DefaultMutableTreeNode Computer_Science_and_Information_Systems = new DefaultMutableTreeNode("Computer_Science_and_Information_Systems");
DefaultMutableTreeNode Chemical_Engineering = new DefaultMutableTreeNode("Chemical_Engineering");
DefaultMutableTreeNode Civil_and_Structural_Engineering = new DefaultMutableTreeNode("Civil_and_Structural_Engineering");
DefaultMutableTreeNode Electrical_and_Electronic_Engineering = new DefaultMutableTreeNode("Electrical_and_Electronic_Engineering");
DefaultMutableTreeNode Mechanical_Engineering = new DefaultMutableTreeNode("Mechanical_Engineering");
DefaultMutableTreeNode Mineral_and_Mining_Engineering = new DefaultMutableTreeNode("Mineral_and_Mining_Engineering");
DefaultMutableTreeNode Accounting_and_Finance = new DefaultMutableTreeNode("Accounting_and_Finance");
DefaultMutableTreeNode Anthropology = new DefaultMutableTreeNode("Anthropology");
DefaultMutableTreeNode Development_Studies = new DefaultMutableTreeNode("Development_Studies");
/* Students */
String Students[] = {"Ruben", "John", "Rita", "Monica", "Russell", "Logan", "Jane", "Mace", "Shawn", "Debora"};
Universities.add(European); Universities.add(French);
Universities.add(American); Universities.add(Bryusov);
European.add(Business_Management); European.add(Economics_and_Management); European.add(Information_technology); European.add(International_Relation);
European.add(Linguistics); European.add(Tourism); European.add(European_Criminal_Law_Section);
French.add(Business_Management); French.add(Economics_and_Management); French.add(Information_technology); French.add(International_Relation);
French.add(Linguistics); French.add(Tourism); French.add(European_Criminal_Law_Section);
American.add(Business_Management); American.add(Economics_and_Management); American.add(Information_technology); American.add(International_Relation);
American.add(Linguistics); American.add(Tourism); American.add(European_Criminal_Law_Section);
Bryusov.add(Business_Management); Bryusov.add(Economics_and_Management);
Bryusov.add(Information_technology); Bryusov.add(International_Relation);
Bryusov.add(Linguistics); Bryusov.add(Tourism); Bryusov.add(European_Criminal_Law_Section);
Business_Management.add(Computer_Science_and_Information_Systems); Business_Management.add(Chemical_Engineering);
Business_Management.add(Civil_and_Structural_Engineering); Business_Management.add(Electrical_and_Electronic_Engineering);
Business_Management.add(Mechanical_Engineering); Business_Management.add(Mineral_and_Mining_Engineering);
Business_Management.add(Accounting_and_Finance); Business_Management.add(Anthropology);
Business_Management.add(Development_Studies);
Economics_and_Management.add(Computer_Science_and_Information_Systems); Economics_and_Management.add(Chemical_Engineering);
Economics_and_Management.add(Civil_and_Structural_Engineering); Economics_and_Management.add(Electrical_and_Electronic_Engineering);
Economics_and_Management.add(Mechanical_Engineering); Economics_and_Management.add(Mineral_and_Mining_Engineering);
Economics_and_Management.add(Accounting_and_Finance); Economics_and_Management.add(Anthropology);
Economics_and_Management.add(Development_Studies);
Information_technology.add(Computer_Science_and_Information_Systems); Information_technology.add(Chemical_Engineering);
Information_technology.add(Civil_and_Structural_Engineering); Information_technology.add(Electrical_and_Electronic_Engineering);
Information_technology.add(Mechanical_Engineering); Information_technology.add(Mineral_and_Mining_Engineering);
Information_technology.add(Accounting_and_Finance); Information_technology.add(Anthropology);
Information_technology.add(Development_Studies);
International_Relation.add(Computer_Science_and_Information_Systems); International_Relation.add(Chemical_Engineering);
International_Relation.add(Civil_and_Structural_Engineering); International_Relation.add(Electrical_and_Electronic_Engineering);
International_Relation.add(Mechanical_Engineering); International_Relation.add(Mineral_and_Mining_Engineering);
International_Relation.add(Accounting_and_Finance); International_Relation.add(Anthropology);
International_Relation.add(Development_Studies);
Linguistics.add(Computer_Science_and_Information_Systems); Linguistics.add(Chemical_Engineering);
Linguistics.add(Civil_and_Structural_Engineering); Linguistics.add(Electrical_and_Electronic_Engineering);
Linguistics.add(Mechanical_Engineering); Linguistics.add(Mineral_and_Mining_Engineering);
Linguistics.add(Accounting_and_Finance); Linguistics.add(Anthropology);
Linguistics.add(Development_Studies);
Tourism.add(Computer_Science_and_Information_Systems); Tourism.add(Chemical_Engineering);
Tourism.add(Civil_and_Structural_Engineering); Tourism.add(Electrical_and_Electronic_Engineering);
Tourism.add(Mechanical_Engineering); Tourism.add(Mineral_and_Mining_Engineering);
Tourism.add(Accounting_and_Finance); Tourism.add(Anthropology);
Tourism.add(Development_Studies);
European_Criminal_Law_Section.add(Computer_Science_and_Information_Systems); European_Criminal_Law_Section.add(Chemical_Engineering);
European_Criminal_Law_Section.add(Civil_and_Structural_Engineering); European_Criminal_Law_Section.add(Electrical_and_Electronic_Engineering);
European_Criminal_Law_Section.add(Mechanical_Engineering); European_Criminal_Law_Section.add(Mineral_and_Mining_Engineering);
European_Criminal_Law_Section.add(Accounting_and_Finance); European_Criminal_Law_Section.add(Anthropology);
European_Criminal_Law_Section.add(Development_Studies);
for( int i = 0; i < Students.length; i++ )
{
Computer_Science_and_Information_Systems.add(new DefaultMutableTreeNode(Students[i]));
Chemical_Engineering.add(new DefaultMutableTreeNode(Students[i]));
Civil_and_Structural_Engineering.add(new DefaultMutableTreeNode(Students[i]));
Electrical_and_Electronic_Engineering.add(new DefaultMutableTreeNode(Students[i]));
Mechanical_Engineering.add(new DefaultMutableTreeNode(Students[i]));
Mineral_and_Mining_Engineering.add(new DefaultMutableTreeNode(Students[i]));
Accounting_and_Finance.add(new DefaultMutableTreeNode(Students[i]));
Anthropology.add(new DefaultMutableTreeNode(Students[i]));
Development_Studies.add(new DefaultMutableTreeNode(Students[i]));
}
tree = new JTree(Universities);
frame.add(tree);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new JScrollPane(tree));
frame.setSize(300, 300);
this.pack();
frame.setVisible(true);
}
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run()
{
new MyClass();
}
});
}
}