|
import java.io.ByteArrayOutputStream;
import java.io.FileWriter;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class Main extends JFrame {
JTextArea aTextArea = new JTextArea();
PrintStream aPrintStream = new PrintStream(new FilteredStream(new ByteArrayOutputStream()));
public Main() {
setSize(300, 300);
add("Center", new JScrollPane(aTextArea));
setVisible(true);
System.setOut(aPrintStream); // catches System.out messages
System.setErr(aPrintStream); // catches error messages
}
class FilteredStream extends FilterOutputStream {
public FilteredStream(OutputStream aStream) {
super(aStream);
}
public void write(byte b[]) throws IOException {
String aString = new String(b);
aTextArea.append(aString);
}
public void write(byte b[], int off, int len) throws IOException {
String aString = new String(b, off, len);
aTextArea.append(aString);
FileWriter aWriter = new FileWriter("a.log", true);
aWriter.write(aString);
aWriter.close();
}
}
}
|