JTreePanel.java

import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
public class JTreePanel {

    public static JPanel jPan = new JPanel();
    private static JTree dir;
    private static String[][] branches = new String[0][0]; //edit this String Array and then call the constructor to update
    // the directory
    public static DefaultMutableTreeNode selectedNode;


    public static void makeJTreePanel(){

        DefaultMutableTreeNode root = new DefaultMutableTreeNode("Database");

        for(int i = 0;i<branches.length;i++){									//first for loop, creates the main branch(Directories)
            DefaultMutableTreeNode sub1 = new DefaultMutableTreeNode(
                    new DefaultMutableTreeNode(branches[i][0]));


            for(int n=1;n<branches[i].length;n++){								//second loop, creates the second line(Tables)
                sub1.add(new DefaultMutableTreeNode(branches[i][n]));
            }
            root.add(sub1);
        }


        dir = new JTree(root);
        dir.addTreeSelectionListener(e -> {
           selectedNode = (DefaultMutableTreeNode)dir.getLastSelectedPathComponent();
        });
        dir.setRootVisible(true);
        dir.setShowsRootHandles(true);
        jPan.add(dir);
    }

    public static JPanel getJPanel(){

        return jPan;
    }

    // Using these we assume it has gotten past the other Error checks and will work

    public static void addDirectory(String dirName){
        jPan.remove(dir);
        String[][] temp = new String[branches.length+1][];
        for(int i = 0; i<branches.length;i++){
            temp[i] = new String[branches[i].length];
            for(int n = 0;n<branches[i].length;n++){
                temp[i][n] = branches[i][n];
            }
        }
        temp[branches.length] = new String[1]; //+1
        temp[branches.length][0] = dirName;
        //temp[branches.length][1] = "temp"; // makes it so the node is a folder // if you uncomment this add 1 to temp length

        branches = temp;

        makeJTreePanel();




    }





    public static void addTable(String dirName, String tableName){
        jPan.remove(dir);
        int[] index = new int[2];
        for(int i = 0; i<branches.length;i++){
            if(branches[i][0].equals(dirName)){
                index[0]=i;
                index[1]=0;
            }
        }

        String[][] temp = new String[branches.length][];

        for(int i=0; i<index[0];i++){
            temp[i] = new String[branches[i].length];
            for(int n = 0; n<branches[i].length;n++){
                temp[i][n] = branches[i][n];
            }
        }

        temp[index[0]] = new String[branches[index[0]].length+1];
        for(int i = 0;i<branches[index[0]].length;i++){
            temp[index[0]][i]=branches[index[0]][i];
        }
        temp[index[0]][branches[index[0]].length]=tableName;

        for(int i = index[0]+1; i<branches.length;i++){
            temp[i] = new String[branches[i].length];
            for(int n = 0; n<branches[i].length;n++){
                temp[i][n] = branches[i][n];
            }
        }

        branches = temp;

        makeJTreePanel();

    }





    // for this to work the directory must be there
    public static void removeDirectory(String dirName){
        jPan.remove(dir);
        int[] index = new int[2];
        for(int i = 0; i<branches.length;i++){
            if(branches[i][0].equals(dirName)){
                index[0]=i;
                index[1]=0;
                break;
            }
        }
        String[][] temp = new String[branches.length-1][];

        for(int i=0; i<index[0];i++){
            temp[i] = new String[branches[i].length];
            for(int n = 0; n<branches[i].length;n++){
                temp[i][n] = branches[i][n];
            }
        }

        for(int i = index[0]; i<temp.length;i++){
            temp[i] = new String[branches[i+1].length];
            for(int n = 0; n<branches[i+1].length;n++){
                temp[i][n] = branches[i+1][n];
            }
        }
        branches = temp;
        makeJTreePanel();

    }

    //what did you do again

    public static void refreshTree(){
        jPan.remove(dir);
        makeJTreePanel();
    }



    public static void removeTable(String dirName, String tableName){
        jPan.remove(dir);
        int[] index = new int[2];
        for(int i = 0; i<branches.length;i++){
            if(branches[i][0].equals(dirName)){
                for(int n = 1;n<branches[i].length;n++){
                    if(branches[i][n].equals(tableName)){
                        index[0]=i;
                        index[1]=n;
                    }
                }
            }
        }
        String[][] temp = new String[branches.length][];

        for(int i=0; i<index[0];i++){
            temp[i] = new String[branches[i].length];
            for(int n = 0; n<branches[i].length;n++){
                temp[i][n] = branches[i][n];
            }
        }


        temp[index[0]] = new String[branches[index[0]].length-1];
        for(int n = 0;n<index[1];n++){
            temp[index[0]][n]=branches[index[0]][n];
        }
        for(int n = index[1];n<temp[index[0]].length;n++){
            temp[index[0]][n]=branches[index[0]][n+1];
        }


        for(int i = index[0]+1; i<branches.length;i++){
            temp[i] = new String[branches[i].length];
            for(int n = 0; n<branches[i].length;n++){
                temp[i][n] = branches[i][n];
            }
        }



        branches = temp;
        makeJTreePanel();
    }
}
/*
for(int i = 0; i<branches.length;i++){
	for(int n = 0;n<branches[i].length;n++){
		
	}
}
*/