Java 向JInternalFrame内的JPanel添加图像
我想在JPanel中添加一个图像,JPanel在JInternalFrame中,JInternalFrame有一个父对象JDesktopPane 我尝试使用另一个类从路径添加图像,然后,Java 向JInternalFrame内的JPanel添加图像,java,image,swing,jinternalframe,jdesktoppane,Java,Image,Swing,Jinternalframe,Jdesktoppane,我想在JPanel中添加一个图像,JPanel在JInternalFrame中,JInternalFrame有一个父对象JDesktopPane 我尝试使用另一个类从路径添加图像,然后,jPanel1=newimagen(),该类将在窗口构造函数中接收字符串形式的路径,但它不起作用。我试着从initComponents()中定制代码,行jPanel1=javax.swing.JPanel()并用jPanel1=new Imagen()替换此行;,构造函数将接收的参数是映像文件的路径,此方法工作正
jPanel1=newimagen()代码>,该类将在窗口构造函数中接收字符串形式的路径,但它不起作用。我试着从initComponents()
中定制代码,行jPanel1=javax.swing.JPanel()代码>并用jPanel1=new Imagen()替换此行;,构造函数将接收的参数是映像文件的路径,此方法工作正常,但它只运行一次(在initComponents()方法中),我无法(或不知道)如何替换JPanel中的映像(
该项目首先以一个JDesptopPane开始,然后是一个JInternalFrame(1),从这个internalframe开始,它显示其他JInternalFrame(2),从这个internalframe开始,它显示其他JInternalFrame(3),在internalFrame 3中,我想用按钮和JFileChooser查找一个图像,以及filechooser接收到的路径,我想在Imagen()类中设置为参数。并将图像设置为一个JPanel,该JPanel构建在JInternalFrame(3)中
编辑1:感谢您的评论。下面是窗口构造函数JInternalFrame(3)的代码:
public AgregarContacto() {
JFileChooser jf = new JFileChooser();
jf.setDialogTitle("Elija el archivo de Imagen");
int i = jf.showOpenDialog(null);
if (i == JFileChooser.APPROVE_OPTION) {
default1 = jf.getSelectedFile().getAbsolutePath();
}
initComponents();
jPanel1= new Imagen(default1);
for (String llenarMese : p.llenarMeses()) {
Mes.addItem(llenarMese);
}
for (String llenarDia : p.llenarDias31()) {
Dia.addItem(llenarDia);
}
for (String llenarAnios : p.Anios()) {
Anio.addItem(llenarAnios);
}
}
这里是类Imagen()的代码,它将在构造函数中接收字符串:
public class Imagen extends JPanel {
String ruta;
private BufferedImage imag;
public Imagen(String path){
ruta = path;
try{
imag = ImageIO.read(new File("unknown.png"));
}catch(IOException ex){
JOptionPane.showMessageDialog(null, "Error " + ex.getMessage());
}
}
@Override
public void paint(Graphics g){
super.paint(g);
Image Scaledimage = imag.getScaledInstance(this.getWidth(), this.getHeight(), Image.SCALE_SMOOTH);
g.drawImage(Scaledimage, 0, 0, null);
}
}
有多种方法可以做到这一点,但更可取的方法之一是为ImagePane
提供更改其显示的图像的能力,而无需创建新的实例
通过这种方式,您只需向ImagePane
传递对要加载的图像的引用,并让它完成任务
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.filechooser.FileFilter;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JDesktopPane dp = new JDesktopPane() {
@Override
public Dimension getPreferredSize() {
return new Dimension(600, 600);
}
};
JInternalFrame inFrm = new JInternalFrame("Image", true, true, true, true);
inFrm.add(new ShowImagePane());
inFrm.pack();
inFrm.setVisible(true);
dp.add(inFrm);
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(dp);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class ShowImagePane extends JPanel {
private JFileChooser fc;
public ShowImagePane() {
setLayout(new BorderLayout());
ImagePane imagePane = new ImagePane();
add(imagePane);
JButton open = new JButton("Open...");
open.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (fc == null) {
fc = new JFileChooser();
fc.addChoosableFileFilter(new FileFilter() {
@Override
public boolean accept(File f) {
String name = f.getName().toLowerCase();
return name.endsWith(".png")
|| name.endsWith(".jpg")
|| name.endsWith(".jpeg")
|| name.endsWith(".bmp");
}
@Override
public String getDescription() {
return "Images";
}
});
fc.setFileSelectionMode(JFileChooser.FILES_ONLY);
fc.setMultiSelectionEnabled(false);
}
switch (fc.showOpenDialog(ShowImagePane.this)) {
case JFileChooser.APPROVE_OPTION:
File selected = fc.getSelectedFile();
try {
imagePane.setImageSource(selected);
} catch (IOException ex) {
ex.printStackTrace();
}
break;
}
}
});
add(open, BorderLayout.SOUTH);
}
}
public class ImagePane extends JPanel {
private BufferedImage bgImage;
private Image scaled;
public ImagePane(File source) throws IOException {
setImageSource(source);
}
public ImagePane() {
}
@Override
public void invalidate() {
super.invalidate();
resizeImage();
}
public void setImageSource(File source) throws IOException {
if (source != null) {
bgImage = ImageIO.read(source);
resizeImage();
} else {
bgImage = null;
}
}
@Override
public Dimension getPreferredSize() {
return bgImage == null ? new Dimension(200, 200) : new Dimension(bgImage.getWidth(), bgImage.getHeight());
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (scaled != null) {
Graphics2D g2d = (Graphics2D) g.create();
int x = (getWidth() - scaled.getWidth(this)) / 2;
int y = (getHeight() - scaled.getHeight(this)) / 2;
g2d.drawImage(scaled, x, y, this);
g2d.dispose();
}
}
protected void resizeImage() {
if (bgImage != null) {
if (getWidth() < getHeight()) {
scaled = bgImage.getScaledInstance(this.getWidth(), -1, Image.SCALE_SMOOTH);
} else {
scaled = bgImage.getScaledInstance(-1, getHeight(), Image.SCALE_SMOOTH);
}
repaint();
}
}
}
}
导入java.awt.BorderLayout;
导入java.awt.Dimension;
导入java.awt.EventQueue;
导入java.awt.Graphics;
导入java.awt.Graphics2D;
导入java.awt.Image;
导入java.awt.event.ActionEvent;
导入java.awt.event.ActionListener;
导入java.awt.image.buffereImage;
导入java.io.File;
导入java.io.IOException;
导入java.util.logging.Level;
导入java.util.logging.Logger;
导入javax.imageio.imageio;
导入javax.swing.JButton;
导入javax.swing.JDesktopPane;
导入javax.swing.JFileChooser;
导入javax.swing.JFrame;
导入javax.swing.JInternalFrame;
导入javax.swing.JOptionPane;
导入javax.swing.JPanel;
导入javax.swing.UIManager;
导入javax.swing.UnsupportedLookAndFeelException;
导入javax.swing.filechooser.FileFilter;
公开课考试{
公共静态void main(字符串[]args){
新测试();
}
公开考试(){
invokeLater(新的Runnable(){
@凌驾
公开募捐{
试一试{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(ClassNotFoundException |实例化Exception | IllegalacessException |不支持ookandfeelException ex){
例如printStackTrace();
}
JDesktopPane dp=新JDesktopPane(){
@凌驾
公共维度getPreferredSize(){
返回新维度(600600);
}
};
JInternalFrame inFrm=新的JInternalFrame(“图像”,真,真,真,真);
添加(新的ShowImagePane());
infm.pack();
信息设置可见(真);
dp.add(inFrm);
JFrame=新JFrame(“测试”);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
帧。添加(dp);
frame.pack();
frame.setLocationRelativeTo(空);
frame.setVisible(true);
}
});
}
公共类ShowImagePane扩展了JPanel{
私有JFileChooser fc;
公共ShowImagePane(){
setLayout(新的BorderLayout());
ImagePane ImagePane=新建ImagePane();
添加(图像窗格);
JButton open=新JButton(“打开…”);
open.addActionListener(新建ActionListener()){
@凌驾
已执行的公共无效操作(操作事件e){
如果(fc==null){
fc=新的JFileChooser();
fc.addChoosableFilter(新文件过滤器(){
@凌驾
公共布尔接受(文件f){
String name=f.getName().toLowerCase();
返回名称.endsWith(“.png”)
||名称.endsWith(“.jpg”)
||name.endsWith(“.jpeg”)
||name.endsWith(“.bmp”);
}
@凌驾
公共字符串getDescription(){
返回“图像”;
}
});
fc.setFileSelectionMode(仅限于JFileChooser.FILES_);
fc.setMultiSelectionEnabled(假);
}
开关(fc.showOpenDialog(ShowImagePane.this)){
案例JFileChooser.APPROVE\u选项:
所选文件=fc.getSelectedFile();
试一试{
imagePane.setImageSource(选中);
}捕获(IOEX异常){
例如printStackTrace();
}
打破
}
}
});
添加(开放式,边界布局。南部);
}
}
公共类ImagePane扩展了JPanel{
专用缓冲图像;