working with combo box and file chooser

[oghenekaro EFEKODO]

neeed help in identifying the problem with my code.And also,i have been trying to create an application that i can attach a passport using the file chooser but failed.please how do i achieve this fast.thanks in advance.

 import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class TestComboBox extends JFrame{
private int num[]=new int[89];
private JComboBox box[];
public TestComboBox(){
 
JPanel panel=new JPanel();
panel.setLayout(new BorderLayout());
for(int i=1;i<num.length;i++){
//String s=Integer.parseInt(num[i]);
box[i]=(JComboBox)Integer.toString(num[i]);
panel.add(box[i]);
}
add(panel);
 
setVisible(true);
setSize(250,250);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String k[]){
new TestComboBox();
}
}   

[Michael Dunn]

not sure what you're trying to do with the combobox, but try this

    
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
class TestComboBox extends JFrame{
  //private int num[]=new int[89];
  private int num = 89;
  //private JComboBox box[];
  private JComboBox box = new JComboBox();
  public TestComboBox(){
 
    JPanel panel=new JPanel();
    //panel.setLayout(new BorderLayout());
    //for(int i=1;i<num.length;i++){
    for(int i=1; i < num;i++){
      //String s=Integer.parseInt(num[i]);
      //box[i]=(JComboBox)Integer.toString(num[i]);
      //panel.add(box[i]);
      box.addItem(String.valueOf(i));
    }
    panel.add(box);
    add(panel);
    //setVisible(true);
    setSize(250,250);
    setVisible(true);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
  public static void main(String k[]){
    new TestComboBox();
  }
}