5

我正在尝试修复一个 JFrame,其中将有一个背景图像和图像 JButtons,它将执行一些命令。我尝试在没有布局的情况下进行操作,因为我想在 JFrame 的某些特定位置放置小按钮,但每次我这样做时,背景图像都会出现在前面,或者 JFrame 的大小等于 JFrame 的大小。使用以下代码,JButton 与 JFrame 具有相同的大小。我试图改变 JButton 的大小和位置,但没有。你能帮我吗?

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; }

4

4 回答 4

6

您需要更改content pane以获得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);
}

输出:

截屏

于 2011-05-06T14:46:16.737 回答
1

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 );
  }
}

然后在你的标签上你可以添加你的按钮?

于 2011-05-06T14:38:33.367 回答
1

您应该交换这两行:

super.paintComponents(g);  //paints the children, like the button
g.drawImage(background, 0, 25, null); // draw background later possibly overwriting the button

因此它应该是这个顺序:

g.drawImage(background, 0, 25, null);
super.paintComponents(g); 

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。

于 2011-05-06T14:39:52.227 回答
0
/*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();
    }
}
于 2017-07-24T17:27:08.067 回答