 <p>Try to write simple programs first. The more you write code, the better you understand it. No one can learn programming just by reading books or written codes. Programming looks hard at first but eventually it becomes a second nature. Never memorize code. Nothing good ever comes out of it. Just understand what a particular class do and IDe will help you in writing methods and properties. Almost any IDE these days has an Auto-complete feature. Don't fret by the amount of code you see in an application. Lots of them are generated automatically by game engine, though you should understand what they mean and do. To give an example this is the source code of a simple converter application I made. You can see how much code is here but with Netbeans IDE I have just written two lines of that, all other are auto generated.</p> <pre><code>/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package Home; /** * * @author Windows8 */ public class CelsiusConverterGUI extends javax.swing.JFrame { /** * Creates new form CelsiusConverterGUI */ public CelsiusConverterGUI() { initComponents(); } /** * This method is called from within the constructor to initialize the form. * WARNING: Do NOT modify this code. The content of this method is always * regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // &lt;editor-fold defaultstate="collapsed" desc="Generated Code"&gt; private void initComponents() { tempTextField = new javax.swing.JTextField(); celsiusLabel = new javax.swing.JLabel(); convertButton = new javax.swing.JButton(); fahrenheitLabel = new javax.swing.JLabel(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setTitle("Celsius Converter"); celsiusLabel.setText("Celsius"); convertButton.setText("Convert"); convertButton.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { convertButtonActionPerformed(evt); } }); fahrenheitLabel.setText("Fahrenheit"); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addComponent(tempTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(celsiusLabel)) .addGroup(layout.createSequentialGroup() .addComponent(convertButton) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(fahrenheitLabel))) .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) ); layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {convertButton, tempTextField}); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(tempTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(celsiusLabel)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(convertButton) .addComponent(fahrenheitLabel)) .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) ); pack(); }// &lt;/editor-fold&gt; private void convertButtonActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: //Parse the celsius input into double int tmpFah = (int) ((Double.parseDouble(tempTextField.getText())) * 1.8 + 32); fahrenheitLabel.setText(tmpFah + " Fahrenheit"); } /** * @param args the command line arguments */ public static void main(String args[]) { /* Set the Nimbus look and feel */ //&lt;editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "&gt; /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(CelsiusConverterGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(CelsiusConverterGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(CelsiusConverterGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(CelsiusConverterGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } //&lt;/editor-fold&gt; /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new CelsiusConverterGUI().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JLabel celsiusLabel; private javax.swing.JButton convertButton; private javax.swing.JLabel fahrenheitLabel; private javax.swing.JTextField tempTextField; // End of variables declaration } </code></pre>