Estou iniciando Java no meu curso técnico, e venho estudando um pouco fora da escola sobre interface gráfica e tal (no segundo ano aprendi C, então isso é uma novidade bem atrativa apra mim). Estou fazendo um mini jogo de luta, de turnos (bem simples, não vem ao caso agora), e para escolher os personagens gostaria de usar um RadioButton.
Eu dei uma estudada nesse site http://docs.oracle.com/javase/tutorial/uiswing/components/button.html, e realmente é muito bom, ensina como faz tudo, etc, só que fiquei com uma dúvida no RadioButton. No código de demonstração, aparece as opções, onde você pode escolher os animais e tal, só que e se eu quisesse que isso fosse uma tela de seleção?
Digo, o usuário selecionaria o personagem (os animais do exemplo, no caso), e então teria um botão: “OK”, onde uma variavel, por exemplo Lutador x = new Lutador(); esse “x” seria a opção selecionada do usuário.
Ai se o usuário selecionasse por exemplo, o “Bird”,
[quote]Lutador x = new Lutador();
x = new Bird();
“Onde Bird seria uma classe-filha de Lutador”.[/quote]
Conseguiram me entender, mais ou menos? =X
Aqui está o código:
[code]/*
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- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
-
- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
-
documentation and/or other materials provided with the distribution.
-
- Neither the name of Oracle or the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package components;
import java.awt.;
import java.awt.event.;
import javax.swing.*;
/*
- RadioButtonDemo.java requires these files:
- images/Bird.gif
- images/Cat.gif
- images/Dog.gif
- images/Rabbit.gif
- images/Pig.gif
*/
public class RadioButtonDemo extends JPanel implements ActionListener {
static String birdString = "Bird";
static String catString = "Cat";
static String dogString = "Dog";
static String rabbitString = "Rabbit";
static String pigString = "Pig";
JLabel picture;
public RadioButtonDemo() {
super(new BorderLayout());
//Create the radio buttons.
JRadioButton birdButton = new JRadioButton(birdString);
birdButton.setMnemonic(KeyEvent.VK_B);
birdButton.setActionCommand(birdString);
birdButton.setSelected(true);
JRadioButton catButton = new JRadioButton(catString);
catButton.setMnemonic(KeyEvent.VK_C);
catButton.setActionCommand(catString);
JRadioButton dogButton = new JRadioButton(dogString);
dogButton.setMnemonic(KeyEvent.VK_D);
dogButton.setActionCommand(dogString);
JRadioButton rabbitButton = new JRadioButton(rabbitString);
rabbitButton.setMnemonic(KeyEvent.VK_R);
rabbitButton.setActionCommand(rabbitString);
JRadioButton pigButton = new JRadioButton(pigString);
pigButton.setMnemonic(KeyEvent.VK_P);
pigButton.setActionCommand(pigString);
//Group the radio buttons.
ButtonGroup group = new ButtonGroup();
group.add(birdButton);
group.add(catButton);
group.add(dogButton);
group.add(rabbitButton);
group.add(pigButton);
//Register a listener for the radio buttons.
birdButton.addActionListener(this);
catButton.addActionListener(this);
dogButton.addActionListener(this);
rabbitButton.addActionListener(this);
pigButton.addActionListener(this);
//Set up the picture label.
picture = new JLabel(createImageIcon("images/"
+ birdString
+ ".gif"));
//The preferred size is hard-coded to be the width of the
//widest image and the height of the tallest image.
//A real program would compute this.
picture.setPreferredSize(new Dimension(177, 122));
//Put the radio buttons in a column in a panel.
JPanel radioPanel = new JPanel(new GridLayout(0, 1));
radioPanel.add(birdButton);
radioPanel.add(catButton);
radioPanel.add(dogButton);
radioPanel.add(rabbitButton);
radioPanel.add(pigButton);
add(radioPanel, BorderLayout.LINE_START);
add(picture, BorderLayout.CENTER);
setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
}
/** Listens to the radio buttons. */
public void actionPerformed(ActionEvent e) {
picture.setIcon(createImageIcon("images/"
+ e.getActionCommand()
+ ".gif"));
}
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path) {
java.net.URL imgURL = RadioButtonDemo.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("RadioButtonDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
JComponent newContentPane = new RadioButtonDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
frame.setResizable(false);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
[/code]