我在使用 JFrame
和 JButton 时遇到问题。我试图将我的 JButton
居中,但是当我这样做时,它几乎覆盖了整个屏幕。你知道是什么原因造成的吗?
这是一张关于它的外观的图片:
这是我的代码:
package character;
import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.io.IOException;
/**
* Created by Niknea on 6/28/14.
*/
public class characterSelector{
JFrame cselectorButtons, clogo;
JLabel logo, characterName, label;
JButton male, female;
public characterSelector(){
this.createCharacterSelector();
}
public void createCharacterSelector() {
try {
label = new JLabel(new ImageIcon(ImageIO.read(getClass()
.getResource("/resources/Grass_Background.jpg"))));
cselectorButtons = new JFrame("SupremeSoccer");
logo = new JLabel(new ImageIcon(ImageIO.read(this.getClass().getResource("/resources/Character_Selector_Image.png"))));
characterName = new JLabel("<Character Name>");
characterName.setFont(new Font(characterName.getFont().getName(),
Font.HANGING_BASELINE, 50));
/*
Buttons
*/
male = new JButton("Male");
////******************////
//// END OF BUTTONS ////
////****************////
cselectorButtons.add(logo);
cselectorButtons.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
cselectorButtons.setContentPane(label);
cselectorButtons.setLayout(new BorderLayout());
cselectorButtons.add(logo, BorderLayout.NORTH);
cselectorButtons.add(male, BorderLayout.CENTER);
cselectorButtons.pack();
cselectorButtons.setLocationRelativeTo(null);
cselectorButtons.setVisible(true);
} catch (IOException exp) {
exp.printStackTrace();
}
}
}
再次感谢。
最佳答案
Any idea's on what's causing this?
这是BorderLayout
的默认行为。当其他组件(NORTH
、SOUTH
、 EAST
、WEST
)位置已考虑在内
根据您想要实现的目标,您可能会考虑创建另一个 JPanel
(将其 opaque
状态设置为 false
因此它是透明的)并且请改用 GridLayout
或 GridBagLayout
之类的内容。
看看A Visual Guide to Layout Managers获取更多想法
已更新
所以根据你的linked code ,我改变了
part2 = new JPanel();
至
part2 = new JPanel(new java.awt.GridBagLayout());
并且得到了...
更新了更多示例
首先将您的需求分解为单独的容器,并重点关注每个单独的布局需求,然后将它们全部构建回单个容器中。
这将使以后更改它们变得更加容易,也使控制它们变得更加容易......
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class ExampleLayout {
public static void main(String[] args) {
new ExampleLayout();
}
public ExampleLayout() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private HeaderPane header;
private ScorePane score;
private CharacterSelectionPane characterSelection;
public TestPane() {
setLayout(new BorderLayout());
JLabel background = new JLabel();
try {
BufferedImage img = ImageIO.read(getClass().getResource("/Grass.jpg"));
background.setIcon(new ImageIcon(img));
} catch (IOException ex) {
ex.printStackTrace();
}
add(background);
background.setLayout(new GridBagLayout());
header = new HeaderPane();
score = new ScorePane();
characterSelection = new CharacterSelectionPane();
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.weightx = 1;
gbc.fill = GridBagConstraints.BOTH;
background.add(header, gbc);
background.add(score, gbc);
gbc.weighty = 1;
background.add(characterSelection, gbc);
}
}
public class HeaderPane extends JPanel {
public HeaderPane() {
setLayout(new BorderLayout());
JLabel label = new JLabel("Character Selection");
label.setForeground(Color.WHITE);
label.setFont(label.getFont().deriveFont(Font.BOLD, 48f));
label.setHorizontalAlignment(JLabel.CENTER);
add(label);
setOpaque(false);
}
}
public class ScorePane extends JPanel {
public ScorePane() {
JLabel label = new JLabel("[-][-[]-][-]");
label.setForeground(Color.YELLOW);
add(label);
setOpaque(false);
}
}
public class CharacterSelectionPane extends JPanel {
private JButton btMale;
private JButton btFemale;
private JTextField tfName;
private JButton btContinue;
public CharacterSelectionPane() {
setOpaque(false);
setLayout(new GridBagLayout());
btMale = new JButton("Male");
btFemale = new JButton("Female");
btContinue = new JButton("Continue");
tfName = new JTextField(10);
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.insets = new Insets(4, 4, 4, 4);
gbc.fill = GridBagConstraints.HORIZONTAL;
add(btMale, gbc);
gbc.gridx++;
add(btFemale, gbc);
gbc.gridx = 0;
gbc.gridy++;
add(new JLabel("Name:"), gbc);
gbc.gridx++;
add(tfName, gbc);
gbc.gridx = 0;
gbc.gridy++;
gbc.gridwidth = GridBagConstraints.REMAINDER;
add(btContinue, gbc);
}
}
}
关于java - 图形用户界面 : JButton Covering almost the entire screen,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/24481472/