Question

In: Computer Science

Write Java code which will create a GUI window on screen. The window has one button:...

Write Java code which will create a GUI window on screen. The window has one button: Doggy. When the user selects Doggy, “Bow Bow” should be printed on screen. Justify your syntax.

Solutions

Expert Solution

import java.awt.event.*;  
import javax.swing.*;    
public class Guitest {  //class
public static void main(String[] args) {  //main function
    JFrame f=new JFrame("dog");  //creating frame object
    final JLabel l1=new JLabel("");  //creating label object
    l1.setBounds(150,50, 100,30);  //set the label size
    JButton b=new JButton("Doggy");  //creating button and set the text as doggy
    b.setBounds(150,100,100,30);  //set the button size
    b.addActionListener(new ActionListener(){ //define event functon in the button object  
public void actionPerformed(ActionEvent e){  
            l1.setText("Bow Bow.");  //when the button will be clicked the function set the label text as Bow Bow 
        }  
    });  
    f.add(b);//adding button in the frame
    f.add(l1);  //adding label in the frame
    f.setSize(400,400);  //ste the size of frame
    f.setLayout(null);  
    f.setVisible(true);   
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//exit conditon
}  
}  

sampel output:-

i have use swing class for gui componants.

create a class and main function

then create the jframe object ans set the title from the constructer.

create the jlabel object and set the size of it.

create the jbutton object and ste the text using constructer

set the size of the button

then in button's event set the event that you want to perform when the button is clicked

add the button ,label in the frame

set f.setLayout(null) as we are not using any layout

    f.setVisible(true); to show the frame

finaly the exit condition for closing the program


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