Problems After shifting swing application from jdk1.3 to 1.4

Question

hi,
i have shifted my Swing application from jdk1.3 to 1.4, some component settings changed in j2se1.4. are listed below
1). i have added JComboBox to JPanel using BoxLayout, in jdk1.3 it is normal where as in 1.4 comboBox height is increased to panel height.
Sample code
(in a Panel)
     setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
add(getYearComboBox());
     add(getMonthNameComboBox());
     add(getDayOfMonthComboBox());
2). in jdk1.3 the icon which is set to JFrame is visible in the JOptioPane.showConfirmationDialog() also, but in 1.4 the icon is not visible in conformation dialog box.
Sample Code
in a JFrame's constructor
public OptionPaneTest()
ImageIcon icon = new ImageIcon("icon.gif");
setIconImage(icon.getImage());     
setSize(250,100);
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent e) {
                    System.exit(0);
setVisible(true);
JOptionPane.showMessageDialog(this,"hai", "Hai",JOptionPane.WARNING_MESSAGE);
3). the Labels added to the panel or frame are displaying in light blue color with jdk1.3 and the same label displaying in black with j2se1.3
Sample Code
in a JPanel
setLayout(new BorderLayout(20, 20));
add(new JLabel("Testing Label Color"), BorderLayout.CENTER);
please send solution to any or all.
thanks in advance,
Pavan.DV

Answer 1

Thanks for your sugession.
You realized me by showing the fact that there are no many classes
Keep suggesting like this.
I don't even know how to see the API documentation Before you told me.
Don't take any issue as simple thing and never give foolish suggessions like this.
If you know the Answer then share it or else musukoni kurcho ra