JLabel j[]=new JLabel[10];
i=0;
j[i]=new JLabel();
j[i].setText("1");
this.add(j[i]);

JLabel j[]=new JLabel[50];
try {
  Rectangle bounds = jLabel1.getBounds();
  j[i].setText("1");
  this.add(j[i]);
  j[i].setBounds(jLabel1.getX(),jLabel1.getY()+50 ,jLabel1.getHeight(),jLabel1.getWidth()); } catch(Exception e) {
  System.out.println(e.toString());
}

j[i] = new JLabel();

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class Test {

    protected void initUI() {
        final JFrame frame = new JFrame();
        frame.setTitle("Test JLabel");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        class TestPanel extends JPanel {
            int i;

            public TestPanel() {
                JLabel j[] = new JLabel[10];
                i = 0;
                j[i] = new JLabel();
                j[i].setText("1");
                this.add(j[i]);
            }
        }
        frame.add(new TestPanel());
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new Test().initUI();
            }
        });
    }

}