JTextArea on JPanel implements ActionListener

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A text area is a text control that lets the user enter multiple lines of text.

Text areas are implemented in Swing with the JTextArea class. It takes the following constructor methods:

1. JTextAread(int, int) A text area with the specified number of rows and columns.
2. JTextArea(String, int, int) A text field with the specified text , rows and columns.

Example:

The following example creates a text area object of 10 rows and 20 columns.

JTextArea txtArea=new JTextArea(10,20);

The following table describes some of the methods provided by the JTextArea class

Methods	Description
append(String)	Appends the given string to the end of the document.
void getColumns(int) int getRows(int)	Returns the number of columns and rows in the text area.
insert(String, int)	Insert a specified text at the specified position in the text area.
void setRows(int) void setFont(Font)	The setRows() methods sets the number of rows for the text area and the setFont() method sets a specific font for the text.

Example:

The following example displayed one text field and one password field.

/* =========================================================== File Name : TextAreaDemo.java WebSite : http://javaproglang.blogspot.in/ Facebook : https://www.facebook.com/AdvanceJavaProgramming Twitter ID : https://twitter.com/AdvanceJava Created By : Bintu Chaudhary =========================================================== */ import javax.swing.*; import java.awt.event.*; public class TextAreaDemo extends JPanel implements ActionListener { // creates two object of the JLabel class JLabel lblName, lblAdd; JTextField txtName, txtAdd; JTextArea taRemarks; JButton btnIcon; ImageIcon imgIcon; public TextAreaDemo() { // To set the layout to none setLayout(null); lblName = new JLabel("Enter Your Name : "); lblAdd = new JLabel("Enter Your Address : "); txtName = new JTextField(15); txtAdd = new JTextField(25); taRemarks = new JTextArea(10,10); imgIcon = new ImageIcon("Images/Process.gif"); btnIcon = new JButton("Process", imgIcon); btnIcon.addActionListener(this); // setBounds() method is used to specify the positioning of the objects lblName.setBounds(10,20,120,25); txtName.setBounds(150,20,150,25); lblAdd.setBounds(10,60,150,25); txtAdd.setBounds(150,60,200,25); btnIcon.setBounds(120,100,150,30); taRemarks.setBounds(30,140,330,100); //Add labels to the Panel. add(lblName); add(txtName); add(lblAdd); add(txtAdd); add(btnIcon); add(taRemarks); } public void actionPerformed(ActionEvent actEvt) { if (actEvt.getSource() == btnIcon) { taRemarks.append("Name: "+txtName.getText()+"\n"); taRemarks.append("Address: "+txtAdd.getText()+"\n"); } } public static void main(String[] args) { // calls the TextAreaDemo constructor. TextAreaDemo taDemo = new TextAreaDemo(); //set the text on the frame JFrame frm = new JFrame("Text Area Demo"); frm.setContentPane(taDemo); // setSize() methods is used to specify the width and height of the frame frm.setSize(400,300); // To display the Frame frm.setVisible(true); WindowListener listener = new WindowAdapter() { public void windowClosing(WindowEvent winEvt) { System.exit(0); } }; // End of WindowAdaptor() method // Window listener activates the windowClosing() method frm.addWindowListener(listener); } }

C:\>jdk1.4\bin>javac TextAreaDemo.java
C:\>jdk1.4\bin>java TextAreaDemo

"Output of TextAreaDemo.class"

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Java Swing-1

JFrame	JPanel	JApplet
JButtons	JLabels	JTextFields
JPasswordField	JTextAreas	JCheckBoxes
JRadioButtons	JList	JComboBox