《Java程式設計》第16周周四：GUI編程及檔案對話方塊的使用

package qiang; import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.File;import javax.swing.JButton;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JTextField;public class FileChooser extends JFrame implements ActionListener{/** *  */private static final long serialVersionUID = 1L;/** *  */    JButton open=null;JTextField jtfPath=null;public static void main(String[] args){new FileChooser();}public FileChooser(){this.setLayout(new FlowLayout());open=new JButton("open");open.addActionListener(this);this.add(open);JTextField jtfPath = new JTextField("選擇的檔案",40);jtfPath.setEditable(false);jtfPath.setHorizontalAlignment(JTextField.CENTER);this.add(jtfPath);this.setBounds(400,200,100,100);this.setVisible(true);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//open.addActionListener(this);}@Overridepublic void actionPerformed(ActionEvent e) {   JFileChooser jfc=new JFileChooser();   jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES );   jfc.showDialog(new JLabel(),"選擇");   File file=jfc.getSelectedFile();   if(file.isDirectory()){   System.out.println("檔案夾:"+file.getAbsolutePath());   }else if(file.isFile()){System.out.println("檔案："+file.getAbsolutePath());}   System.out.println(jfc.getSelectedFile().getName());   // 把檔案路徑顯示在文字框中       jtfPath.setText(file.getAbsolutePath());}}

<img src="https://img-blog.csdn.net/20150625105310363?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvdTAxMzkyMjkwNA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

<img src="https://img-blog.csdn.net/20150625105321176?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvdTAxMzkyMjkwNA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />