java 如何在图像上放置 JButton？
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how can i put a JButton on an image?
提问by Eristikos
I am trying to fix a JFrame where there will be a background image and on the image JButtons which will do some commands. I try to do it without layout because i want to put small buttons in some specific locations on the JFrame but every time i do it, the background image comes to the front or the JFrame has size equal to the JFrame size. With the following code, the JButton has the same size to JFrame. I have tried to change the size and location of the JButton but nothing. Can you help me please?
我正在尝试修复一个 JFrame，其中将有一个背景图像和图像 JButtons 将执行一些命令。我尝试在没有布局的情况下执行此操作，因为我想在 JFrame 上的某些特定位置放置小按钮，但每次执行此操作时，背景图像都会出现在前面或 JFrame 的大小等于 JFrame 大小。使用以下代码，JButton 的大小与 JFrame 相同。我试图改变 JButton 的大小和位置，但没有。你能帮我吗？
here is the code
这是代码
public final class Test extends JComponent
{
private Image background;
private JFrame frame;
private Dimension dimension;
public Test()
{
dimension = new Dimension(15, 15);
frame = new JFrame("Iphone");
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(this);
frame.setBounds(641, 0, 344, 655);
frame.setVisible(true);
test = displayButton("tigka");
frame.getContentPane().add(test);
}
public void update(Graphics g)
{
paint(g);
}
public void paintComponent(Graphics g)
{
super.paintComponents(g);
g.drawImage(background, 0, 25, null); // draw background
// label();
test = displayButton("test");
}
public JButton displayButton(String name)
{
JButton button = new JButton(name);
button.setSize(100, 100);
button.setPreferredSize(dimension);
return button;
}
回答by dacwe
You need to change the content paneto get a background for your Frame.
您需要更改content pane以获取Frame.
public static void main(String[] args) throws IOException {
JFrame frame = new JFrame("Test");
frame.setContentPane(new JPanel() {
BufferedImage image = ImageIO.read(new URL("http://upload.wikimedia.org/wikipedia/en/2/24/Lenna.png"));
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, 0, 0, 300, 300, this);
}
});
frame.add(new JButton("Test Button"));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300, 300);
frame.setVisible(true);
}
Output:
输出：
回答by Liv
Have you tried using a JLabel with HTML in the label? Something like this:
您是否尝试过在标签中使用带有 HTML 的 JLabel？像这样的东西：
import javax.swing.*;
public class SwingImage1
{
public static void main( String args[] )
{
JFrame frm = new JFrame( "Swing Image 1" );
JLabel lbl = new JLabel( "<html><body><img src=\"http://liv.liviutudor.com/images/liv.gif\"></body></html>" );
frm.getContentPane().add( lbl );
frm.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
frm.pack();
frm.setVisible( true );
}
}
then on top of your label you can add your button?
那么在你的标签之上你可以添加你的按钮吗？
回答by Thomas
You should swap those two lines:
你应该交换这两行：
super.paintComponents(g); //paints the children, like the button
g.drawImage(background, 0, 25, null); // draw background later possibly overwriting the button
Thus it should be this order:
因此应该是这个顺序：
g.drawImage(background, 0, 25, null);
super.paintComponents(g);
Additionally, note that the content pane's default layout is BorderLayout. Thus you'd set the layout of your content pane to null explicitly.
此外，请注意内容窗格的默认布局是 BorderLayout。因此，您可以将内容窗格的布局显式设置为 null。
回答by NIKHIL UPADHYAY
/*it is simple to put button on image first set image by making object then make button object & add the button object direct to image object rather then add to frame.*/
package frame;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class frame
{
public frame()
{
JFrame obj = new JFrame("Banking Software");
JButton b1 = new JButton("Opening Account");
JLabel image = new JLabel(new ImageIcon("money.jpg"));
image.setBounds(0,0, 1600, 1400);
obj.setExtendedState(JFrame.MAXIMIZED_BOTH);
obj.add(image);
b1.setBounds(500,400, 100, 40);
image.add(b1);
obj.setVisible(true);
}
public static void main(String args[])
{
new frame();
}
}
