System.out.println의 재정의

System.out.println의 재정의
다른 블로그에서 참조하였다. 지금 출처를 잊음.

import java.io.IOException;

import java.io.PipedInputStream;

import java.io.PipedOutputStream;

import java.io.PrintStream;

import javax.swing.JTextArea;

import javax.swing.text.BadLocationException;

public class SoutInterceptor {

private PipedInputStream pipedInputStream;

private PrintStream originalPrint;

public SoutInterceptor() {

originalPrint = System.out;

this.pipedInputStream = new PipedInputStream();

}

public String getMessages() throws IOException {

byte[] messages = new byte[pipedInputStream.available()];

pipedInputStream.read(messages, 0, messages.length);

return new String(messages);

}

public void active() throws IOException {

final PipedOutputStream pipedOutputStream = new PipedOutputStream(pipedInputStream);

PrintStream saveStream = new PrintStream(pipedOutputStream) {

@Override

public void print(String x) {

//super.print(x);

originalPrint.println("Override" + x);

}

};

System.setOut(saveStream);

}

public static void main(String args[]){

try {

new SoutInterceptor().active();

System.out.println("hi");

} catch (Exception e) {

e.printStackTrace();

}

}

}