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JAVA AWT : TextField, TextArea

Java AWT TextField

The object of a TextField class is a text component that allows the editing of a single line text. It inherits TextComponent class.

AWT TextField Class Declaration

  1. public class TextField extends TextComponent  

Java AWT TextField Example

  1. import java.awt.*;  
  2. class TextFieldExample{  
  3. public static void main(String args[]){  
  4.     Frame f= new Frame("TextField Example");  
  5.     TextField t1,t2;  
  6.     t1=new TextField("Welcome to Javatpoint.");  
  7.     t1.setBounds(50,100, 200,30);  
  8.     t2=new TextField("AWT Tutorial");  
  9.     t2.setBounds(50,150, 200,30);  
  10.     f.add(t1); f.add(t2);  
  11.     f.setSize(400,400);  
  12.     f.setLayout(null);  
  13.     f.setVisible(true);  
  14. }  
  15. }  

Java AWT TextField Example with ActionListener

  1. import java.awt.*;  
  2. import java.awt.event.*;  
  3. public class TextFieldExample extends Frame implements ActionListener{  
  4.     TextField tf1,tf2,tf3;  
  5.     Button b1,b2;  
  6.     TextFieldExample(){  
  7.         tf1=new TextField();  
  8.         tf1.setBounds(50,50,150,20);  
  9.         tf2=new TextField();  
  10.         tf2.setBounds(50,100,150,20);  
  11.         tf3=new TextField();  
  12.         tf3.setBounds(50,150,150,20);  
  13.         tf3.setEditable(false);   
  14.         b1=new Button("+");  
  15.         b1.setBounds(50,200,50,50);  
  16.         b2=new Button("-");  
  17.         b2.setBounds(120,200,50,50);  
  18.         b1.addActionListener(this);  
  19.         b2.addActionListener(this);  
  20.         add(tf1);add(tf2);add(tf3);add(b1);add(b2);  
  21.         setSize(300,300);  
  22.         setLayout(null);  
  23.         setVisible(true);  
  24.     }         
  25.     public void actionPerformed(ActionEvent e) {  
  26.         String s1=tf1.getText();  
  27.         String s2=tf2.getText();  
  28.         int a=Integer.parseInt(s1);  
  29.         int b=Integer.parseInt(s2);  
  30.         int c=0;  
  31.         if(e.getSource()==b1){  
  32.             c=a+b;  
  33.         }else if(e.getSource()==b2){  
  34.             c=a-b;  
  35.         }  
  36.         String result=String.valueOf(c);  
  37.         tf3.setText(result);  
  38.     }  
  39. public static void main(String[] args) {  
  40.     new TextFieldExample();  
  41. }  
  42. }  

Java AWT TextArea

The object of a TextArea class is a multi line region that displays text. It allows the editing of multiple line text. It inherits TextComponent class.

AWT TextArea Class Declaration

  1. public class TextArea extends TextComponent  

Java AWT TextArea Example

  1. import java.awt.*;  
  2. public class TextAreaExample  
  3. {  
  4.      TextAreaExample(){  
  5.         Frame f= new Frame();  
  6.             TextArea area=new TextArea("Welcome to javatpoint");  
  7.         area.setBounds(10,30, 300,300);  
  8.         f.add(area);  
  9.         f.setSize(400,400);  
  10.         f.setLayout(null);  
  11.         f.setVisible(true);  
  12.      }  
  13. public static void main(String args[])  
  14. {  
  15.    new TextAreaExample();  
  16. }  
  17. }  

Java AWT TextArea Example with ActionListener

  1. import java.awt.*;  
  2. import java.awt.event.*;  
  3. public class TextAreaExample extends Frame implements ActionListener{  
  4. Label l1,l2;  
  5. TextArea area;  
  6. Button b;  
  7. TextAreaExample(){  
  8.     l1=new Label();  
  9.     l1.setBounds(50,50,100,30);  
  10.     l2=new Label();  
  11.     l2.setBounds(160,50,100,30);  
  12.     area=new TextArea();  
  13.     area.setBounds(20,100,300,300);  
  14.     b=new Button("Count Words");  
  15.     b.setBounds(100,400,100,30);  
  16.     b.addActionListener(this);  
  17.     add(l1);add(l2);add(area);add(b);  
  18.     setSize(400,450);  
  19.     setLayout(null);  
  20.     setVisible(true);  
  21. }  
  22. public void actionPerformed(ActionEvent e){  
  23.     String text=area.getText();  
  24.     String words[]=text.split("\\s");  
  25.     l1.setText("Words: "+words.length);  
  26.     l2.setText("Characters: "+text.length());  
  27. }  
  28. public static void main(String[] args) {  
  29.     new TextAreaExample();  
  30. }  
  31. }  

Anurag Rana Educator CSE/IT

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