Java SE (Java Platform, Standard Edition)

//here, the datas from tables are created
package usermanagementconsole.gui.data;

import usermanagementconsole.database.OracleSQL;
import java.sql.*;
import java.util.Hashtable;
import java.util.Vector;
/**
 *
 * @author dev60cgi
 */
public class TreeData extends OracleSQL {
    
    private String appcode, apptablename, menutablename;
    private int appid;
    /** Creates a new instance of TreeData */
    public TreeData(String Appcode) {      
        appcode = Appcode;
    }
    
    public void setAppTable(String Apptablename, String Menutablename) {
        apptablename = Apptablename;
        menutablename = Menutablename;
    }
    
    private void setAppID() {
        try {
            Statement stmt = oraConnection.createStatement();            
            String sql = "select app_id from "+apptablename+" where app_code = '"+appcode+"'";
            ResultSet rst = stmt.executeQuery(sql);
            while(rst.next()) {
                appid = rst.getInt(1);                
            }
            rst.close();
        }
        catch(SQLException sqx) {
            sqx.printStackTrace();
            appid = 0;            
        }
    }
    
    public boolean initTreeData() {
        boolean isExecuted = executeProcedure("populate_menu_data", appid);
        return isExecuted;
    }
    
    public String[] getChild(String parent) {
        Vector rowdata = new Vector();
        try {
            Statement stmt = oraConnection.createStatement();
            String sql = "select levels, menu_id from "+menutablename+" where upper(menu_name) = upper('"+parent+"')";
            ResultSet rst = stmt.executeQuery(sql);
            while(rst.next()) {
                int levels = rst.getInt(1)+1;
                int menuid = rst.getInt(2);
                String sqlchild = "select menu_name from "+menutablename+" where levels="+levels+" and menu_parent="+menuid;
                ResultSet rstchild = stmt.executeQuery(sqlchild);
                while(rstchild.next()) {
                    rowdata.addElement(rstchild.getString(1));
                }
            }
            stmt.close();
        }
        catch(SQLException sqx) {
            sqx.printStackTrace();
        }
        return getStringData(rowdata);
    }
    
    public int getChildCount(String parent) {
        int rowcount = 0;
        try {
            Statement stmt = oraConnection.createStatement();
            String sql = "select levels, menu_id from "+menutablename+" where upper(menu_name) = upper('"+parent+"')";
            ResultSet rst = stmt.executeQuery(sql);
            while(rst.next()) {
                int levels = rst.getInt(1)+1;
                int menuid = rst.getInt(2);
                String sqlchild = "select count(menu_name) from "+menutablename+" where levels="+levels+" and menu_parent="+menuid;
                ResultSet rstchild = stmt.executeQuery(sqlchild);
                while(rstchild.next()) {
                    rowcount = rstchild.getInt(1);
                }
            }
            stmt.close();
        }
        catch(SQLException sqx) {
            sqx.printStackTrace();
        }
        return rowcount;        
    }
    
    public boolean isLeaf(String menuname) {
        boolean isleaf = false;
        try {
            Statement stmt = oraConnection.createStatement();
            String sql = "select menu_type from "+menutablename+" where menu_name = '"+menuname+"'";
            ResultSet rst = stmt.executeQuery(sql);
            while(rst.next()) {
                int menutype = rst.getInt(1);
                if (menutype==2) {
                    isleaf = true;
                }
                else {
                    isleaf = false;
                }
            }
        }
        catch(SQLException sqx) {
            sqx.printStackTrace();
        }
        return isleaf;
    }
    private String[] getStringData(Vector data) {
        int rowcnt = data.size();
        String[] strdata = new String[rowcnt];
        for (int i=0;i<rowcnt;i++) {
            strdata[i] = data.elementAt(i).toString();
        }
        return strdata;
    }  
}

//Here, data model for JTree
package usermanagementconsole.gui.data;

import com.sun.java.swing.*;
import java.io.Serializable;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;

public class TreeDataModel extends DefaultTreeModel implements Serializable {

    TreeNode root;
    TreeData treedata;
    public TreeDataModel(TreeNode node) {        
        super(node);
        root = node;
        treedata = new TreeData("BO");
        treedata.setAppTable("TVR_JV_APP","TVR_JV_MENU_TEMP");
        treedata.initTreeData();
    }

    public Object getRoot() {
        return  root;
    }

    public Object getChild( Object parent, int index ) {
        String[] children = treedata.getChild((String)parent);
        return ( children[index] );
    }

    public int getChildCount( Object parent ) {
        int childcount = treedata.getChildCount((String)parent);
        return childcount;
    }

    public boolean isLeaf( Object node ) {
        return treedata.isLeaf((String)node);
    }

    public void valueForPathChanged( TreePath path, Object newValue ) {
        
    }

    public int getIndexOfChild( Object parent, Object child ) {     
        String[] children = treedata.getChild((String)parent);
        int result = -1;
        for ( int i = 0; i < children.length; ++i ) {
            if ( child.toString().equals( children[i] ) ) {
                result = i;
                break;
            }
        }        
        return result;
    }
    
}

//And then, create GUI to show JTree
package usermanagementconsole.gui;

import usermanagementconsole.database.*;
import usermanagementconsole.gui.data.TreeData;
import usermanagementconsole.gui.data.TreeDataModel;
import javax.swing.JFrame;
import javax.swing.plaf.*;
import javax.swing.tree.*;
import javax.swing.JTree;
import java.awt.BorderLayout;
import java.util.Hashtable;
/**
 *
 * @author dev60cgi
 */
public class GuiMenuTree extends JFrame {
    
    JTree tree;
    /** Creates a new instance of GuiMenuTree */
    public GuiMenuTree() {
        super("Verifikasi dan Audit");
        setSize(200, 150);    
    }
    
    public void initTree() {
        DefaultMutableTreeNode root = new DefaultMutableTreeNode("User Management Console");
        TreeDataModel model = new TreeDataModel(root);
        tree = new JTree(model);
        tree.putClientProperty("JTree.lineStyle", "Angled");
        getContentPane().add(tree, BorderLayout.CENTER);        
    }
    
    public static void main (String ar[]) {
        GuiMenuTree tt = new GuiMenuTree();
        tt.initTree();
        tt.setVisible(true);        
    }

}