java里面的Jpanel可以添加FileDialog文件对话框吗？应该怎么添加呢？

Question

对话框FileDialog

Answer 1

用JFileChooser就挺好的了，FileDialog这个awt的老古董就别用了吧
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;public class Demo extends JFrame {
    private JTextArea jta;
    private JButton jbtnOpen;    private void initUI() {
        jta = new JTextArea();
        jta.setEditable(false);
        jbtnOpen = new JButton("open");        add(new JScrollPane(jta), BorderLayout.CENTER);
        add(jbtnOpen, BorderLayout.SOUTH);        jbtnOpen.addActionListener(new ActionListener() {            @Override
            public void actionPerformed(ActionEvent e) {
                JFileChooser fileChooser = new JFileChooser();
                BufferedReader br = null;
                int action = fileChooser.showOpenDialog(Demo.this);
                if (action == JFileChooser.APPROVE_OPTION) {
                    File file = fileChooser.getSelectedFile();
                    try {
                        br = new BufferedReader(new FileReader(file));
                        String eachLine = null;
                        while ((eachLine = br.readLine()) != null) {
                            jta.append(eachLine);
                            jta.append(System.getProperty("line.separator"));
                        }
                    } catch (FileNotFoundException e1) {
                        e1.printStackTrace();
                    } catch (IOException e1) {
                        e1.printStackTrace();
                    } finally{
                        if(br != null){
                            try {
                                br.close();
                            } catch (IOException e1) {
                                e1.printStackTrace();
                            }
                        }
                    }
                }
            }
        });
    }    public Demo() {
        setTitle("open demo");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 300);        initUI();
    }    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {            @Override
            public void run() {
                Demo demo = new Demo();
                demo.setVisible(true);
            }
        });
    }
}