java 在 JComboBox 中显示图像
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displaying images in JComboBox
提问by Lalchand
i need to display a image in JComboBox
我需要在 JComboBox 中显示图像
回答by camickr
Just add an Icon to the model instead of a String:
只需向模型添加一个图标而不是字符串：
import java.awt.*;
import javax.swing.*;
public class ComboBoxIcon extends JFrame
{
JComboBox comboBox;
public ComboBoxIcon()
{
Object[] items =
{
new ImageIcon("about16.gif"),
new ImageIcon("add16.gif"),
new ImageIcon("copy16.gif")
};
comboBox = new JComboBox( items );
getContentPane().add( comboBox, BorderLayout.NORTH );
}
public static void main(String[] args)
{
JFrame frame = new ComboBoxIcon();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible( true );
}
}
回答by Codemwnci
Take a look at this example that appears to do what you want.
看看这个例子，它似乎可以做你想做的事。
http://www.java2s.com/Code/Java/Swing-JFC/CustomComboBoxwithImage.htm
http://www.java2s.com/Code/Java/Swing-JFC/CustomComboBoxwithImage.htm
What you are looking for is a custom renderer for the JComboBox. A renderer is simply a JComponent, so if you can create a component (JPanel with the necessary items contained), then you can create almost any result that you can think of). You can even override the paint method if using standard JComponents are not enough for you.
您正在寻找的是 JComboBox 的自定义渲染器。渲染器只是一个 JComponent，因此如果您可以创建一个组件（包含必要项的 JPanel），那么您几乎可以创建您能想到的任何结果）。如果使用标准 JComponents 对您来说还不够，您甚至可以覆盖 Paint 方法。
