如何正确设置图像的JButton大小? [英] how to properly set size of JButton with image?
问题描述
这就是我现在拥有的:
这就是我想要的图像外观:
This is what I want the image to look like:
我有两个Java文件,一个扩展了JFrame,而Jpanel的一部分基本上是
I have two java files, one extends JFrame and part with Jpanel looks basically
ShinyButtons panel = new ShinyButtons();
panel.setLocation(10, 10);
getContentPane().add(panel);
另一种使用JButton扩展了JPanel 导入javax.swing.*;
another one extends JPanel with JButtons import javax.swing.*;
public class ShinyButtons extends JPanel{
public static byte RED = 0;
public static byte ORANGE = 1;
public static byte YELLOW = 2;
public static byte GREEN = 3;
public static byte BLUE = 4;
public static byte LIGHT_GRAY = 5;
public static byte DARK_GRAY = 6;
public static byte ROWS = 8;
private byte[][] buttonTable;
public ShinyButtons() {
buttonTable = new byte[ROWS][ROWS];
resetButtons();
setBorder(BorderFactory.createEmptyBorder());
setSize(552,552);
ImageIcon[] icons = {new ImageIcon("RedButton.png"), new ImageIcon("OrangeButton.png"), new ImageIcon("YellowButton.png"),
new ImageIcon("GreenButton.png"), new ImageIcon("BlueButton.png"), new ImageIcon("LightGrayButton.png"),
new ImageIcon("DarkGrayButton.png")};
for (int row=0; row<8; row++){
for (int col=0; col<8; col++){
JButton buttons = new JButton();
buttons.setSize(69,69);
buttons.setIcon(icons[(byte)(Math.random()*7)]);
add(buttons);
buttons.setLocation(row*69, col*69);
buttons.setBorder(BorderFactory.createEmptyBorder());
}
}
}
private void resetButtons() {
for (int r=0; r<ROWS; r++)
for (int c=0; c<ROWS; c++)
buttonTable[r][c] = (byte)(Math.random()*7);
}
public byte getButton(int r, int c) { return buttonTable[r][c]; }
}
推荐答案
如何通过图像正确设置JButton的大小?"
"how to properly set size of JButton with image?"
不要完全设置大小.使用布局管理器.请参见 在容器内布置组件 学习不同的布局管理器.最明显的是GridLayout
,它将按您定义的大小在网格中布置组件.如果您看下面的方法,您将看到我使用具有8行8列的GridLayout
.该方法采用动态网格大小.我通过了8.您要做的就是面板上的所有图像/标签.无需指定位置/大小. GridLayout
将为您解决这个问题.
Don't set the sizes at all Use a Layout manager. See Laying out Components Within a Container to learn the different layout managers. The most obvious one is GridLayout
that will layout your components in a grid of a size defined by you. If you look at the method below, you will see I use a GridLayout
with 8 rows and 8 cols. The method takes in a dynamic grid size. I passed 8 to it. The all you have to do is all the images/labels to the panel. No need to specify location/size. The GridLayout
will take care of that for you.
private JPanel createPanel(ImageIcon[] icons, int gridSize) {
Random random = new Random();
JPanel panel = new JPanel(new GridLayout(gridSize, gridSize));
for (int i = 0; i < gridSize * gridSize; i++) {
int index = random.nextInt(icons.length);
JLabel label = new JLabel(icons[index]);
label.setBorder(new LineBorder(Color.GRAY, 2));
panel.add(label);
}
return panel;
}
完整代码
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.util.Random;
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.SwingUtilities;
import javax.swing.border.LineBorder;
public class CircleImages {
public CircleImages() {
ImageIcon[] icons = createImageIcons();
JPanel iconPanel = createPanel(icons, 8);
JPanel bottomLeftPanel = new JPanel(new FlowLayout(FlowLayout.LEADING));
bottomLeftPanel.add(new JLabel("Score: "));
bottomLeftPanel.add(new JTextField(10));
JPanel bottomRightPanel = new JPanel(new FlowLayout(FlowLayout.TRAILING));
bottomRightPanel.add(new JButton("New Game"));
bottomRightPanel.add(new JButton("Quit"));
JPanel bottomPanel = new JPanel(new GridLayout(1, 2));
bottomPanel.add(bottomLeftPanel);
bottomPanel.add(bottomRightPanel);
JFrame frame = new JFrame();
frame.add(iconPanel);
frame.add(bottomPanel, BorderLayout.PAGE_END);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private JPanel createPanel(ImageIcon[] icons, int gridSize) {
Random random = new Random();
JPanel panel = new JPanel(new GridLayout(gridSize, gridSize));
for (int i = 0; i < gridSize * gridSize; i++) {
int index = random.nextInt(icons.length);
JLabel label = new JLabel(icons[index]);
label.setBorder(new LineBorder(Color.GRAY, 2));
panel.add(label);
}
return panel;
}
private ImageIcon[] createImageIcons() {
String[] files = {"blackcircle.png",
"bluecircle.png",
"greencircle.png",
"greycircle.png",
"orangecircle.png",
"redcircle.png",
"yellowcircle.png"
};
ImageIcon[] icons = new ImageIcon[files.length];
for (int i = 0; i < files.length; i++) {
icons[i] = new ImageIcon(getClass().getResource("/circles/" + files[i]));
}
return icons;
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new CircleImages();
}
});
}
}
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