显示图片

显示图片之代码

import java.awt.EventQueue;

import java.awt.Image;

import javax.imageio.ImageIO;

import javax.swing.ImageIcon;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import javax.swing.JButton;

import javax.swing.JLabel;

import java.awt.Color;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

import java.io.File;

import java.io.IOException;

public class ImgDemo extends JFrame {

private JPanel contentPane;

private int idImg = 1;

/**

* Launch the application.

*/

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

ImgDemo frame = new ImgDemo();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

/**

* Create the frame.

*/

public ImgDemo() {

setTitle("\u56FE\u7247\u663E\u793A");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 576, 404);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

contentPane.setLayout(null);

final JLabel lblNewLabel = new JLabel("New label");

lblNewLabel.setBackground(Color.YELLOW);

lblNewLabel.setForeground(Color.PINK);

lblNewLabel.setBounds(48, 86, 400, 400);

contentPane.add(lblNewLabel);

JButton btnNewButton = new JButton("\u663E\u793A\u4E0B\u4E00\u5F20\u56FE\u7247");

btnNewButton.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

ImageIcon icon;

try {

// 获取图片的路径

String strImgFile = "E:/demoPhoto/";

// 得到图片的完整路径小

strImgFile = strImgFile + String.valueOf(idImg) + ".jpg";

// 读取图片

icon = new ImageIcon(ImageIO.read(new File(strImgFile)));

// 从图表中获取到图片

Image image = icon.getImage();

// 缩放图像

Image smallImage = image.getScaledInstance(400,400,Image.SCALE_FAST);

//把Image文件转化为ImageIcon

icon = new ImageIcon(smallImage);

lblNewLabel.setIcon(icon);

idImg = idImg+1;

if(idImg==10)

idImg = 1;

} catch (IOException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

}

});

btnNewButton.setBounds(194, 37, 153, 28);

contentPane.add(btnNewButton);

}

}