java/61_RadioButton at main · PeiHui369/java · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
// JRadioButton = One or more buttons in a grouping in which only 1 may be selected

<Main.java>
public class Main{
    public static void main(String[] args){

    new myFrame();

    }
}

<myFrame.java>
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class myFrame extends JFrame implements ActionListener {
    JRadioButton pizzaButton;
    JRadioButton hamburgerButton;
    JRadioButton hotdogButton;
    ImageIcon pizzaIcon;
    ImageIcon hamburgerIcon;
    ImageIcon hotdogIcon;

    myFrame(){
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLayout(new FlowLayout());

        pizzaIcon = new ImageIcon("pizza.png");
        hamburgerIcon = new ImageIcon("hamburger.png");
        hotdogIcon = new ImageIcon("hotdog.jfif");

        pizzaButton = new JRadioButton("pizza");
        hamburgerButton = new JRadioButton("hamburger");
        hotdogButton = new JRadioButton("hotdog");

        //add icon to button
        pizzaButton.setIcon(pizzaIcon);//or .setSelectedIcon
        hamburgerButton.setIcon(hamburgerIcon);
        hotdogButton.setIcon(hotdogIcon);

        //put in same button group so can only select one
        ButtonGroup group = new ButtonGroup();
        group.add(pizzaButton);
        group.add(hamburgerButton);
        group.add(hotdogButton);

        //addActionListener to function(print) at terminal
        pizzaButton.addActionListener(this);
        hamburgerButton.addActionListener(this);
        hotdogButton.addActionListener(this);

        this.add(pizzaButton);
        this.add(hamburgerButton);
        this.add(hotdogButton);
        this.pack();
        this.setVisible(true);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getSource()==pizzaButton){
            System.out.println("You ordered pizza!");
        }else if(e.getSource()==hamburgerButton){
            System.out.println("You ordered a hamburger!");
        }else if(e.getSource()==hotdogButton){
            System.out.println("You ordered a hotdog!");
        }
    }
}