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TreeNode tn = treeView1.SelectedNode;
            if (treeView1.SelectedNode != null)
            {
                if (tn.Parent == null)
                {
                    return;
                }
                else
                {
                    if (tn.PrevNode != null)
                    {
                        for (int i = 0; i < treeView1.Nodes[1].Nodes.Count; i++)
                        {
                            if (treeView1.Nodes[1].Nodes[i] == tn)
                            {
                                treeView1.Nodes.Remove(tn);
                                treeView1.Nodes[1].Nodes.Insert(tn.Index - 1, tn);
                                treeView1.SelectedNode = tn;
                            }
                        }
 
                        for (int i = 0; i < treeView1.Nodes[2].Nodes.Count; i++)
                        {
                            if (treeView1.Nodes[2].Nodes[i] == tn)
                            {
                                treeView1.Nodes.Remove(tn);
                                treeView1.Nodes[2].Nodes.Insert(tn.Index - 1, tn);
                                treeView1.SelectedNode = tn;
                            }
                        }
                    }
                }
            }

Main.java:1: error: class, interface, or enum expected
TreeNode tn = treeView1.SelectedNode;
^
Main.java:2: error: class, interface, or enum expected
            if (treeView1.SelectedNode != null)
            ^
Main.java:7: error: class, interface, or enum expected
                }
                ^
Main.java:12: error: class, interface, or enum expected
                        for (int i = 0; i < treeView1.Nodes[1].Nodes.Count; i++)
                                        ^
Main.java:12: error: class, interface, or enum expected
                        for (int i = 0; i < treeView1.Nodes[1].Nodes.Count; i++)
                                                                            ^
Main.java:17: error: class, interface, or enum expected
                                treeView1.Nodes[1].Nodes.Insert(tn.Index - 1, tn);
                                ^
Main.java:18: error: class, interface, or enum expected
                                treeView1.SelectedNode = tn;
                                ^
Main.java:19: error: class, interface, or enum expected
                            }
                            ^
Main.java:22: error: class, interface, or enum expected
                        for (int i = 0; i < treeView1.Nodes[2].Nodes.Count; i++)
                                        ^
Main.java:22: error: class, interface, or enum expected
                        for (int i = 0; i < treeView1.Nodes[2].Nodes.Count; i++)
                                                                            ^
Main.java:27: error: class, interface, or enum expected
                                treeView1.Nodes[2].Nodes.Insert(tn.Index - 1, tn);
                                ^
Main.java:28: error: class, interface, or enum expected
                                treeView1.SelectedNode = tn;
                                ^
Main.java:29: error: class, interface, or enum expected
                            }
                            ^
13 errors

Standard output is empty