java中用FileDialog打开文件并将内容添加到文本

java中用FileDialog打开文件并将内容添加到文本

mport java.awt.FileDialog;
import java.awt.Frame;
import java.awt.HeadlessException;
import java.awt.TextArea;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class FileDialogtext extends Frame {
	File file1;
	TextArea textArea;
	FileDialog fd;
	public FileDialogtext() throws HeadlessException, IOException {
		setBounds(400, 400, 400, 400);
		setTitle("FileDialog打开文件");
		fd = new FileDialog(this, "打开文件");
　　　　　　　　fd.setVisible(true);//setVisible()必须在getFile()和getDirectory()之前
		String fileName = fd.getFile();//得到文件名
		file1 = new File(fd.getDirectory() + fileName);//得到文件目录
		BufferedReader fr = new BufferedReader(new FileReader(file1));
		String s1 = "";
		String s2 = "";
		while ((s1 = fr.readLine()) != null) {
			s2 += s1 + '\n';
		}
		textArea = new TextArea();
		add("Center", textArea);
		textArea.append(s2);
		setVisible(true);
		setTitle("简易文本编辑器"+fileName);
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent arg0) {
				System.exit(0);
			}
		});

}


public static void main(String[] args) throws HeadlessException,
	IOException {
		new FileDialogtext();
	}

}