Creating TextFields & Password in an Applet Window using Advanced Java Programming

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Text fields provide an area value where on can enter and edit a single line of text. Text fields are generally used for getting text input from a user.

One can use the TextField class to create text fields in a container, by using one of the manager.

1. TextField() Empty TextBox which will never display any Text String into that TextBox and this looks as default Text Field neither a Text nor a Specified Length of TextBox.
2. TextField(int) This will Create a TextField and this will Accept the Number which will Specify Size of the textbox. Size never Means as Length as total Number of characters rather this determines the number of characters to be displayed at a Time I the textbox.
3. TextField(String) Creates a text field with a given string.
4. TextField(Strings, int) Creates a text field with the name of strings and the site of textbox which contains a Given String and When you Exceeds the number of Characters of a TextBox then you have to use the Arrow Keys for displaying Previous Text from a TextField. All the Examples of a TextField as follows:-

TextField ti=new TextField();
TextField t2=new TextField(20);
TextField t3=new TextField("Hello", 10);

The following program code show how to create a frame window:
/* =========================================================== File Name : TextFieldTest.java WebSite : http://javaproglang.blogspot.in/ Facebook : https://www.facebook.com/AdvanceJavaProgramming Created By : Bintu Chaudhary =========================================================== */ import java.awt.*; import java.applet.*; /* <APPLET Code="TextFieldTest" Width=500 Height=200> </APPLET> */ public class TextFieldTest extends Applet { public void init( ) { Label lblName = new Label("enter name"); Label lblPhone = new Label("enter phone number"); Label lblPasswd = new Label("enter password"); TextField txtName = new TextField("your name here", 20); TextField txtPhone = new TextField(12); add(lblName); add(txtName); add(lblPhone); add(txtPhone); } }
The above code will be stored in the file called TextFieldsTest.java, which on compilation will crate a class file called TextFieldsTest.class. Now compiple this file using below commands in the DOS mode:

C:\>jdk1.4\bin>javac TextFieldsTest.java
C:\>jdk1.4\bin>appletviewer TextFieldsTest.java

"Output of TextFieldTest.java"

Download Complete Program   -

Methods of the TextFields Object:

Methods	Action
setText(String)	used to set the text in the TextBox.
getText()	Used to get the Text from a TextField.
setColumns()	Used for Specifying how many Columns a user wan1ts o display the text in the TextField.
Select (int, int)	select the text from first point to last point.
selectAll()	This will Select text from a TextBox.
isEditable()	return true or false based on whether the text is Editable. Or whether a user ca write any text into a TextField.
setEditable(Boolean)	Used to set the State for Specifying whether we can write in the TextField or not
getEchoChar(char)	it returns the character used for masking input.
setEchochar(char)	This is used to set the Character Format as a Input.
echoCharItSet()	Return true or false based on whether the field has Echo character or no.

Creating Password

You can create a password field using the methods of the TextField class. The following program code shows how to create password fields:

/* =========================================================== File Name : TextFieldPassword.java WebSite : http://javaproglang.blogspot.in/ Facebook : https://www.facebook.com/AdvanceJavaProgramming Created By : Bintu Chaudhary =========================================================== */ import java.awt.*; import java.applet.*; /* <APPLET Code="TextFieldPassword" Width=500 Height=200> </APPLET> */ public class TextFieldPassword extends Applet { public void init() { Label lblName = new Label("enter name"); Label lblPasswd = new Label("enter password"); TextField txtName = new TextField("your name here", 20); TextField txtPasswd = new TextField(20); add(lblName); add(txtName); add(lblPasswd); txtPasswd.setEchoChar('*'); add(txtPasswd); } }
The above code will be stored in the file called TextFieldsPassword.java, which on compilation will crate a class file called TextFieldsPassword.class. Now compiple this file using below commands in the DOS mode:

C:\>jdk1.4\bin>javac TextFieldsPassword.java
C:\>jdk1.4\bin>appletviewer TextFieldsPassword.java

"Output of TextFieldPassword.java"

Download Complete Program Java Source Code   -   Class File

AWT Controls

Label	Buttons	Check Boxes	Radio Buttons
Choice Controls	TextFields & Password	TextAreas	Scrolling Lists	Scrollbars