Latihan 1 <^__^)


import java.awt.Color;
import java.awt.Font;
import javax.swing.text.StyledEditorKit.BoldAction;


public class jframe1Asih extends javax.swing.JFrame {

    /** Creates new form jframe1Asih */
    public jframe1Asih() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jComboBox1 = new javax.swing.JComboBox();
        jComboBox2 = new javax.swing.JComboBox();
        jComboBox3 = new javax.swing.JComboBox();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setText("FONT");

        jLabel2.setText("COLOUR");

        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Arial", "Tahoma", "Verdana", " " }));
        jComboBox1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jComboBox1ActionPerformed(evt);
            }
        });

        jComboBox2.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "PLAIN", "BOLD", "ITALIC" }));
        jComboBox2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jComboBox2ActionPerformed(evt);
            }
        });

        jComboBox3.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "RED", "BLUE", "BLACK" }));
        jComboBox3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jComboBox3ActionPerformed(evt);
            }
        });

        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(39, 39, 39)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(jComboBox2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                    .addComponent(jLabel2)
                                    .addComponent(jLabel1))
                                .addGap(27, 27, 27)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                    .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(jComboBox3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(47, 47, 47)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(187, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(42, 42, 42)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jComboBox2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(8, 8, 8)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(jComboBox3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(65, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>

    private void jComboBox1ActionPerformed(java.awt.event.ActionEvent evt) {
       if (jComboBox1.getSelectedItem()=="Arial")
       {jTextArea1.setFont(new Font("Arial",Font.PLAIN,12)); }
else if (jComboBox1.getSelectedItem()=="Verdana")
        {jTextArea1.setFont(new Font("Verdana",Font.PLAIN,12)); }
else if (jComboBox1.getSelectedItem()=="Tahoma")
        {jTextArea1.setFont(new Font("Tahoma",Font.PLAIN,12));}
    }

    private void jComboBox2ActionPerformed(java.awt.event.ActionEvent evt) {
       if(jComboBox2.getSelectedItem()=="PLAIN")
        { jTextArea1.setFont(new Font(jTextArea1.getFont().getName(),
            Font.PLAIN, jTextArea1.getFont().getSize()));
        }
        else if(jComboBox2.getSelectedItem()=="BOLD")
        { jTextArea1.setFont(new Font(jTextArea1.getFont().getName(),
               Font.BOLD, jTextArea1.getFont().getSize()));
        }
        else   {
                jTextArea1.setFont(new Font(jTextArea1.getFont().getName(),
                Font.ITALIC,jTextArea1.getFont().getSize()));
        }
           
    }

    private void jComboBox3ActionPerformed(java.awt.event.ActionEvent evt) {
      if(jComboBox3.getSelectedIndex()==0){
            jTextArea1.setForeground(Color.RED);
        }
        else if(jComboBox3.getSelectedIndex()==1){
            jTextArea1.setForeground(Color.BLUE);
        }
        else {
            jTextArea1.setForeground(Color.BLACK);
        }
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new jframe1Asih().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JComboBox jComboBox2;
    private javax.swing.JComboBox jComboBox3;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    // End of variables declaration
}