File copy program
Purpose:
1. 1. Familiar with the writing of Swing interface;
2．2. Learn to use the JFileChooser file selector;
3．Learn to use file input stream FileInputStream and output stream FileOutputStream to copy files.
Content:
Use Swing basic components and a suitable layout manager to write the file copy program interface, use the JFileChooser file selector to realize the graphical operation of the source file and the target path, the specific operation flow of the file copy program is as follows:
(1) The main interface of the program operation
(2) Click the "Browse" button to pop up the file selection interface, select the source file to be copied
(3) In the same way, select the target path, and then click "Start Copy" to complete the file copy
Additional function: On the basis of the completion of the above functions, the file copy progress bar function can be added.
code show as below:
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Copy_Frame extends JFrame
//implements Runnable
{
//Create widget
JProgressBar progressbar;
JLabel jl1 = new JLabel("Source File:");
JTextField jtf1 = new JTextField(25);
JButton jb1 = new JButton("Browse");
JLabel jl2 = new JLabel("Target path:");
JTextField jtf2 = new JTextField(25);
JButton jb2 = new JButton("Browse");
JButton copyjb = new JButton("Start copying");
JLabel copylbed=new JLabel("Copy completed");
//Constructor
public Copy_Frame() {
try {
//The interface is set to Windows style
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
| UnsupportedLookAndFeelException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//Create progress bar
progressbar = new JProgressBar();
// Display current progress value information
progressbar.setStringPainted(true);
// Set the progress bar border not to display
progressbar.setBorderPainted(false);
// Set the foreground color of the progress bar
progressbar.setForeground(new Color(0, 210, 40));
// Set the background color of the progress bar
progressbar.setBackground(new Color(188, 190, 194));
//Set the size of the progress bar
progressbar.setBounds(0,270,500,30);
//Set window properties
this.setTitle("File copy program");
this.setLayout(new GridLayout(5, 1));
this.setSize(500, 300);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Copied file control
JPanel jp1 = new JPanel();
jp1.add(jl1);
jp1.add(jtf1);
jp1.add(jb1);
this.add(jp1);
jb1.addMouseListener(new ButtonListener());
//Copy file control
JPanel jp2 = new JPanel();
jp2.add(jl2);
jp2.add(jtf2);
jp2.add(jb2);
this.add(jp2);
jb2.addMouseListener(new ButtonListener());
//Start copying controls
JPanel jp3 = new JPanel();
jp3.add(copyjb);
this.add(jp3);
copyjb.addMouseListener(new ButtonListener());//Set up the listener
this.add(progressbar);
//Progress bar control
JPanel jp4 = new JPanel();
jp4.add(progressbar);
this.add(jp4);
progressbar.setVisible(false);//Hide progress bar
//Copy complete button control
JPanel jp5= new JPanel();
jp5.add(copylbed);
this.add(jp5);
copylbed.setVisible(false);//Hidden text
}
//Use internal classes for file selection
class ButtonListener extends MouseAdapter{
@Override
public void mouseClicked(MouseEvent e) {
//Click to start copying
JFileChooser jc = new JFileChooser();
//If you click to start copying
if(e.getSource()==copyjb) {
progressbar.setVisible(true);//Show progress bar
//Start a new thread, start copying, and the progress bar starts to load
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
try {
copying(jtf1.getText(),jtf2.getText());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();
}
//Click the "Browse" setting path of the file to be copied
if(e.getSource()==jb1) {
int val = jc.showOpenDialog(null);
if (val==JFileChooser.APPROVE_OPTION){//Determine whether to select the file
String copyFromFilePath1 = jc.getSelectedFile().getAbsolutePath();//Print file path
System.out.println(copyFromFilePath1);//The output file path is in the console
jtf1.setText(copyFromFilePath1);//Set the value of the text box to the file path to be copied
}
else{
System.out.println("No files selected！");//No file selected
}
}
//Click the "Browse" setting path of the file to be copied
if(e.getSource()==jb2) {
jc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);//Only select the current file and its directory, do not enter the file
int val=jc.showOpenDialog(null);
if(val==JFileChooser.APPROVE_OPTION) {//Determine whether to select the file path
String copyFromFilePath2=jc.getSelectedFile().getAbsolutePath();//Print file path directory
System.out.println(copyFromFilePath2);//The output file path is in the console
jtf2.setText(copyFromFilePath2);//Set the value of the text box to the file path to be copied
}
else{
System.out.println("No files selected！");//No file selected
}
}
}
}
public void copying(String copy,String be_copyed) throws IOException {//Copy method
FileInputStream in = new FileInputStream(copy);//File input stream
//Create a file object
File f=new File(copy);
//Add the copied file name after the destination
FileOutputStream out = new FileOutputStream(be_copyed+"\\"+f.getName());
//Splicing, add the file name after the directory, indicating where to copy this file
byte[] b = new byte[1024];//Set the cache array, cache 1024 bytes each time
int n;//The number of bytes in the current loop buffer
long k;//Number of times to cache
k=f.length()/1024+1;
long j=k/100;//The number of times the progress bar needs to be cached for every 1%
long y=j;//Set initial value
long i=0;
int p=0;
int x=0;
//run();
//nIs the number of bytes in the file
while ((n=in.read(b))!=-1){
out.write(b,0,n);
i++;//Cache times
if(i==j)
{
j+=y;//The number of times the progress bar needs to be cached for the next load
p++;//The value of the progress bar
progressbar.setValue(p);//Set the current value of the progress bar
System.out.println("File copy current progress"+p+"%");
if(p==100)
{
copylbed.setVisible(true);//Pop-up copy completed label
}
}
}
//Close file input and output stream
in.close();
out.close();
System.out.println("File copy completed！");
}
public static void main(String[] args) {
Copy_Frame ad = new Copy_Frame();
ad.setVisible(true);
}
//JOptionPane.showMessageDialog(this, "Loading completed");
//this.dispose();Close the window and release resources
//this.pack();Fit the control to the window
}
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