I can't see the JFrame components until the end of dataset mapping. Why??

I can't see the JFrame components until the end of dataset mapping. Why??

I have developed a piece of software that creates an Ontology using neo4j.
Once the ontology is built, I start mapping the dataset of 2 million rows
to it, which takes more or less 20 minutes to be completed. As a result, I
wished to add a JFrame that shows the process execution. The code below
creates at the beginning the JFrame and then it starts mapping the
dataset. However, I can see during the execution the JFrame, but its
components appears inside the JFrame after the mapping finishes. I have
read that the problem might be due to the lack of a thread that surround
the code. Can anyone help me in solving this matter??
void createGraphDataset(String [][] choices , final ArrayList<String[]>
DatabaseFile, GraphDatabaseService BORO_DB){
JFrame converterFrame = new JFrame();
converterFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
converterFrame.setBounds(100, 100, 650, 288);
JPanel contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(null);
contentPane.setVisible(true);
converterFrame.getContentPane().add(contentPane);
JPanel panelNeo1 = new JPanel();
panelNeo1.setBackground(SystemColor.text);
panelNeo1.setBounds(6, 6, 638, 254);
panelNeo1.setVisible(true);
contentPane.add(panelNeo1);
panelNeo1.setLayout(null);
JLabel labelNeo1 = new JLabel("CSV BORO Converter");
labelNeo1.setForeground(Color.DARK_GRAY);
labelNeo1.setBounds(16, 19, 260, 37);
panelNeo1.add(labelNeo1);
labelNeo1.setIcon(new
ImageIcon(Neo4jEngine.class.getResource("/javax/swing/plaf/metal/icons/ocean/hardDrive.gif")));
labelNeo1.setFont(new Font("Lucida Grande", Font.BOLD |
Font.ITALIC, 20));
labelNeo1.setBackground(Color.WHITE);
labelNeo1.setOpaque(true);
labelNeo1.setVisible(true);
JPanel panelNeo2 = new JPanel();
panelNeo2.setBounds(16, 60, 605, 167);
panelNeo1.add(panelNeo2);
panelNeo2.setBackground(SystemColor.textHighlight);
panelNeo2.setLayout(null);
panelNeo2.setVisible(true);
/*
JProgressBar progressBar = new JProgressBar();
progressBar.setBounds(27, 89, 547, 20);
panelNeo2.add(progressBar);
panelNeo2.setVisible(true);
*/
JLabel labelNeo2 = new JLabel(" Processing: Number of row");
labelNeo2.setBackground(Color.WHITE);
labelNeo2.setOpaque(true);
labelNeo2.setBounds(28, 36, 184, 20);
panelNeo2.add(labelNeo2);
labelNeo2.setVisible(true);
JLabel labelNeo3 = new JLabel("");
labelNeo3.setBackground(Color.WHITE);
labelNeo3.setBounds(212, 36, 76, 20);
labelNeo3.setOpaque(true);
panelNeo2.add(labelNeo3);
labelNeo3.setVisible(true);
JLabel labelNeo4 = new JLabel();
labelNeo4.setText(String.valueOf(DatabaseFile.size()));
labelNeo4.setBackground(Color.WHITE);
labelNeo4.setBounds(311, 36, 70, 20);
labelNeo4.setOpaque(true);
panelNeo2.add(labelNeo4);
labelNeo4.setVisible(true);
JLabel labelNeo6 = new JLabel("of");
labelNeo6.setOpaque(true);
labelNeo6.setBackground(Color.WHITE);
labelNeo6.setBounds(288, 36, 23, 20);
panelNeo2.add(labelNeo6);
labelNeo6.setVisible(true);
converterFrame.setVisible(true);
TopNode= new Node [DatabaseFile.get(0).length];
//Create TopNodes
Transaction tx0 = BORO_DB.beginTx();
try{
for(int u =0; u<DatabaseFile.get(0).length;u++){
TopNode[u]=BORO_DB.createNode();
TopNode[u].setProperty("name", choices[u][0]);
}
tx0.success();
}
finally{
tx0.finish();
}
//Create the database
for(int i =0; i<DatabaseFile.size();i++){
Transaction tx2 = BORO_DB.beginTx();
try
{
// Nodes for each row
Node []graphNode= new Node [DatabaseFile.get(i).length];
// Relationships for each row ingoing
Relationship [] graphRelOn = new Relationship
[DatabaseFile.get(i).length-1];
// Relationships for each row outgoing
Relationship [] graphRelOut = new Relationship
[DatabaseFile.get(i).length-1];
//Relationship to TopNode ingoing
Relationship TopNodeRelIn[]=new Relationship
[DatabaseFile.get(i).length];
//Creates Nodes for row and relationship to
TopNode
for(int j=0; j<DatabaseFile.get(i).length;j++){
//Stores Database values
String []ValuesRow =DatabaseFile.get(i);
//Creates nodes for 1 row
graphNode[j] = BORO_DB.createNode();
graphNode[j].setProperty("name",
ValuesRow[j]);
//From row to TopNode Relationship
(enter)
TopNodeRelIn[j]=graphNode[j].createRelationshipTo(TopNode[j],
RelTypes.typeInstances);
TopNodeRelIn[j].setProperty("relationship-type",
"typeInstances");
}
//Creates Relationships
for(int k=0;
k<(DatabaseFile.get(i).length)-1;k++){
//Between same elements of the same
row (left to right)
graphRelOn[k]=graphNode[k].createRelationshipTo(graphNode[k+1],
RelTypes.relatesTo);
graphRelOn[k].setProperty("relationship-type",
"relatesTo");
//Between same elements of the same
row (right to left)
graphRelOut[k]=graphNode[(DatabaseFile.get(i).length)-1].createRelationshipTo(graphNode[(DatabaseFile.get(i).length)-(2+k)],
RelTypes.relatesTo);
graphRelOut[k].setProperty("relationship-type",
"relatesTo");
}
tx2.success();
}
finally
{
tx2.finish();
}
}
}