Desain seperti gambar

Masukkan file txt di C:\\ .

Coding pada tombol BACA :

String aLine;

try{

URL source= new URL("file",null,"C:\\coba applet.txt");
BufferedReader br =new BufferedReader (new InputStreamReader(source.openStream()));
aLine=br.readLine();

jTextArea3.setText(aLine);
while(null != (aLine = br.readLine())){

jTextArea3.setText(jTextArea3.getText()+"\n"+aLine);

}

br.close();
jLabel6.setText("File berada di : C:\\");

} catch(Exception e) {
e.printStackTrace();
}