Text are+button, some change in text

Question

Sorry for that question, but i don't understand.
I have a text are, and a button. I need, then i selected some text in text area and press the button, the <b>my letters </b> will be add. How do that? I don't undestand at all =(
Big thx for any help.
If you don'y mind, please make example. Thx very much

Answer 1

I solve the problem
String awd = jTextArea1.getSelectedText();And all code, if any one need
import java.awt.*;
import java.awt.event.*;
import java.awt.datatransfer.*;
import java.io.*;
import java.util.*;
import javax.swing.table.*;
import javax.swing.*;
import javax.swing.text.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
* @author mmakarov
public class TextEditor extends javax.swing.JFrame {
    /** Creates new form TextEditor */
    public TextEditor(
        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")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        jButton1 = new javax.swing.JButton();
        jScrollPane2 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jButton1.setText("jButton1");
        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane2.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()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 243, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addContainerGap())
                    .addComponent(jButton1)))
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 153, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(75, 75, 75)
                .addComponent(jButton1)
                .addContainerGap(46, Short.MAX_VALUE))
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
        pack();
    }// </editor-fold>
    * @param args the command line arguments
     private void jButton1ActionPerformed(java.awt.event.ActionEvent evt)
System.out.print("Hello World ^_________^");
String asd = jTextArea1.getText();
String awd = jTextArea1.getSelectedText();
try {
    if (awd != null)
        jTextArea1.setText("<b>"+awd+"</b>");
   System.out.print(awd);
else
System.out.print("la la la~ figna");
catch (Exception ex)
    System.out.print(ex);
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new TextEditor().setVisible(true);
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JTextArea jTextArea1;
    // End of variables declaration
}