Смена названия у кнопки

import java.awt.*;
import java.awt.event.*;
 
class TextTest extends Frame{
TextTest(String s){
super(s);
String a = " ";
setLayout(null);
setFont(new Font("Serif", Font.PLAIN, 13));
 
Button b1 = new Button("Data");
b1.setBounds(5,30,45,30); add(b1);
 
Button b2 = new Button("is");
b2.setBounds(55,30,20,30); add(b2);
 
Button b3 = new Button("not");
b3.setBounds(80,30,35,30); add(b3);
 
Button b4 = new Button("information");
b4.setBounds(120,30,90,30); add(b4);
 
Button b5 = new Button("is");
b5.setBounds(215,30,20,30); add(b5);
 
Button b6 = new Button("not");
b6.setBounds(45,60,35,30); add(b6);
 
Button b7 = new Button("knowledge");
b7.setBounds(85,60,85,30); add(b7);
 
Button b8 = new Button("is");
b8.setBounds(175,60,20,30); add(b8);
 
Button b9 = new Button("not");
b9.setBounds(200,60,35,30); add(b9);
 
Button b10 = new Button("wisdom");
b10.setBounds(175,90,60,30); add(b10);
 
setSize(250,300); setVisible(true);
 
public static void main(String[] args){
Frame f = new TextTest(" Поля ввода");
f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent ev){
System.exit(0);
}
});
}
}