如何在java swing中的jframe中添加图像？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/21325678/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to add image in jframe in java swing?
提问by user3227258
How to add image . i want to add image only above line not on whole jframe how can i do this in jframe swing. i tried but i ma able to set background image on whole screen.i need to set an background only above line.
如何添加图像。我想只在线条上方而不是在整个 jframe 上添加图像，我怎么能在 jframe 摆动中做到这一点。我试过了，但我可以在整个屏幕上设置背景图像。我只需要在行上方设置背景。
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Line2D;
import javax.swing.*;
import java.sql.*;
public class Demo1 extends JFrame
{
public void paint(Graphics g) {
super.paint(g); // fixes the immediate problem.
Graphics2D g2 = (Graphics2D) g;
Line2D lin = new Line2D.Float(20, 150, 1350, 150);
g2.draw(lin);
}
public Demo1( )
{
{
getContentPane().setBackground(new java.awt.Color(240,255,255));
}
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
Container c = getContentPane();
c.setLayout( new FlowLayout() );
setUndecorated(true);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(0,0,screenSize.width, screenSize.height);
}
public static void main( String[] args )
{
Demo1 frame = new Demo1();
frame.setVisible(true);
}
}
采纳答案by AJ.
And for adding a image you can use g.drawImage(Image img, int x, int y, ImageObserver observer)in paint()function.
添加一个图像，你可以g.drawImage(Image img, int x, int y, ImageObserver observer)在paint()函数中使用。
or
或者
Make a JLabeland add image iconto it
制作一个JLabel并为其添加图像图标
回答by Sagar Chavan
class MyImagePanel extends JPanel{
BufferedImage image;
public void paintComponent(Graphics g){
super.paintComponent(g);
if(image != null){
g.drawImage(image, 0, 0, this);
}
}
}
回答by ravibagul91
//Global Declaration
//全局声明
private BufferedImage bi;
//SomeWhere
//某处
try {
bi = ImageIO.read(new File("C:/1.jpg"));//Write path of your image here
} catch (IOException ex) {
Logger.getLogger(ClassName.class.getName()).log(Level.SEVERE, null, ex);//Change ClassName to your class Name
}
final JPanel panel = new JPanel(){
@Override
protected void paintComponent(Graphics g){
Graphics g2 = g.create();
g2.drawImage(bi, 0, 0, getWidth(), getHeight(), null);
g2.dispose();
}
@Override
public Dimension getPreferredSize(){
return new Dimension(bi.getWidth()/2, bi.getHeight()/2);
}
};
mainPanel.add(panel, BorderLayout.CENTER);
//Add other components to mainPanel
frm.add(mainPanel);
