JButtons 不工作?
JButtons aren't working?
对于我正在制作的游戏,我制作了一个按钮 class 用于我菜单中的所有按钮。我终于设法让我的按钮出现在屏幕上,但现在当我点击它们时没有任何反应。
我的按钮class:
package menu;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JPanel;
public class Button extends JButton{
public JButton button;
public ImageIcon buttonImage;
public int width, height;
public String backgroundPath;
public int x, y;
public ActionListener listener;
public Button(String backgroundPath,int x, int y, ActionListener listener)
{
super();
this.backgroundPath = backgroundPath;
this.x = x;
this.y = y;
this.addActionListener(listener);
buttonImage = new
ImageIcon(PlayPanel.class.getResource(backgroundPath));
button = new JButton();
this.setIcon(buttonImage);
this.setBounds(x, y, buttonImage.getIconWidth(),
buttonImage.getIconHeight());
}
}
我知道我的菜单面板 (@actionPerformed) 中可能有错误。代码如下所示:
package menu;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
@SuppressWarnings("serial")
public class MenuPanel extends JPanel implements ActionListener
{
private Button playKnop, highScoreKnop, quitKnop, HTPKnop;
private Tanks mainVenster;
public MenuPanel menuPanel;
int x = 95, width = 200, height = 50;
public MenuPanel(Tanks mainVenster)
{
this.mainVenster = mainVenster;
this.setLayout(null);
playKnop = new Button("/buttons/PLAY.png",x, 350, menuPanel);
highScoreKnop = new Button("/buttons/HS.png",x, 460, menuPanel);
HTPKnop = new Button("/buttons/HTP.png",x, 515, menuPanel);
quitKnop = new Button("/buttons/QUIT.png",x, 570, menuPanel);
this.add(playKnop);
this.add(quitKnop);
this.add(HTPKnop);
this.add(highScoreKnop);
validate();
}
public void actionPerformed(ActionEvent ae)
{
if (ae.getSource() == playKnop){
mainVenster.switchPanel(new PlayPanel(mainVenster));
} else if (ae.getSource() == quitKnop) {
mainVenster.switchPanel(new QuitPanel(mainVenster));
} else if (ae.getSource() == HTPKnop) {
mainVenster.switchPanel(new HTPPanel(mainVenster));
} else if (ae.getSource() == highScoreKnop) {
mainVenster.switchPanel(new HSPanel(mainVenster));
}
}
}
我认为错误是我正在编写 mainVenster(panel/window 的 venster = 荷兰语),我可能应该编写其他参数。问题是我不知道是哪个。
您正在监听器中定义按钮,因此您必须将 class 本身称为 this
:
playKnop = new Button("/buttons/PLAY.png",x, 350, this);
highScoreKnop = new Button("/buttons/HS.png",x, 460, this);
HTPKnop = new Button("/buttons/HTP.png",x, 515, this);
quitKnop = new Button("/buttons/QUIT.png",x, 570, this);
您已经有一个 menuPanel
属性,因此在创建 class 时您可以分配一个值,在本例中为 this
.
menuPanel = this;
但我不建议您删除此属性或将其重命名为 _this
或 _menuPanel
以符合约定。
有一个java.awt.Button
class。我会考虑不调用您的新按钮 class Button
以防止任何名称空间混淆。
您需要将 this
而不是 menuPanel
作为 ActionListener
传递给您的按钮:
playKnop = new Button("/buttons/PLAY.png",x, 350, this);
对于我正在制作的游戏,我制作了一个按钮 class 用于我菜单中的所有按钮。我终于设法让我的按钮出现在屏幕上,但现在当我点击它们时没有任何反应。
我的按钮class:
package menu;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JPanel;
public class Button extends JButton{
public JButton button;
public ImageIcon buttonImage;
public int width, height;
public String backgroundPath;
public int x, y;
public ActionListener listener;
public Button(String backgroundPath,int x, int y, ActionListener listener)
{
super();
this.backgroundPath = backgroundPath;
this.x = x;
this.y = y;
this.addActionListener(listener);
buttonImage = new
ImageIcon(PlayPanel.class.getResource(backgroundPath));
button = new JButton();
this.setIcon(buttonImage);
this.setBounds(x, y, buttonImage.getIconWidth(),
buttonImage.getIconHeight());
}
}
我知道我的菜单面板 (@actionPerformed) 中可能有错误。代码如下所示:
package menu;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
@SuppressWarnings("serial")
public class MenuPanel extends JPanel implements ActionListener
{
private Button playKnop, highScoreKnop, quitKnop, HTPKnop;
private Tanks mainVenster;
public MenuPanel menuPanel;
int x = 95, width = 200, height = 50;
public MenuPanel(Tanks mainVenster)
{
this.mainVenster = mainVenster;
this.setLayout(null);
playKnop = new Button("/buttons/PLAY.png",x, 350, menuPanel);
highScoreKnop = new Button("/buttons/HS.png",x, 460, menuPanel);
HTPKnop = new Button("/buttons/HTP.png",x, 515, menuPanel);
quitKnop = new Button("/buttons/QUIT.png",x, 570, menuPanel);
this.add(playKnop);
this.add(quitKnop);
this.add(HTPKnop);
this.add(highScoreKnop);
validate();
}
public void actionPerformed(ActionEvent ae)
{
if (ae.getSource() == playKnop){
mainVenster.switchPanel(new PlayPanel(mainVenster));
} else if (ae.getSource() == quitKnop) {
mainVenster.switchPanel(new QuitPanel(mainVenster));
} else if (ae.getSource() == HTPKnop) {
mainVenster.switchPanel(new HTPPanel(mainVenster));
} else if (ae.getSource() == highScoreKnop) {
mainVenster.switchPanel(new HSPanel(mainVenster));
}
}
}
我认为错误是我正在编写 mainVenster(panel/window 的 venster = 荷兰语),我可能应该编写其他参数。问题是我不知道是哪个。
您正在监听器中定义按钮,因此您必须将 class 本身称为 this
:
playKnop = new Button("/buttons/PLAY.png",x, 350, this);
highScoreKnop = new Button("/buttons/HS.png",x, 460, this);
HTPKnop = new Button("/buttons/HTP.png",x, 515, this);
quitKnop = new Button("/buttons/QUIT.png",x, 570, this);
您已经有一个 menuPanel
属性,因此在创建 class 时您可以分配一个值,在本例中为 this
.
menuPanel = this;
但我不建议您删除此属性或将其重命名为 _this
或 _menuPanel
以符合约定。
有一个java.awt.Button
class。我会考虑不调用您的新按钮 class Button
以防止任何名称空间混淆。
您需要将 this
而不是 menuPanel
作为 ActionListener
传递给您的按钮:
playKnop = new Button("/buttons/PLAY.png",x, 350, this);