将控制台信息重新导向到JTextArea

package com.function;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;

import javax.swing.JTextArea;
import javax.swing.SwingUtilities;

import com.ui.Tools_UiDataPanelJTextArea;

/*
 * 将System.out.println() 控制台信息重新导向
 */
public class Tools_DataRedirection extends OutputStream   {
    private final JTextArea destination;
    public Tools_DataRedirection (JTextArea destination)
    {
        if (destination == null)
            throw new IllegalArgumentException ("Destination is null");  

        this.destination = destination;
    }
    @Override
    public void write(byte[] buffer, int offset, int length) throws IOException
    {
        final String text = new String (buffer, offset, length);
        SwingUtilities.invokeLater(new Runnable ()
            {
                @Override
                public void run()
                {
                    destination.append (text);
                }
            });
    }
    @Override
    public void write(int b) throws IOException
    {
        write (new byte [] {(byte)b}, 0, 1);
    }  

}

package com.ui;

import java.io.PrintStream;

import javax.swing.JScrollPane;
import javax.swing.JTextArea;

import com.function.Tools_DataRedirection;
/*
 * 数据显示文本域类
 */
public class Tools_UiDataPanelJTextArea extends JTextArea {
    public Tools_UiDataPanelJTextArea() {
        // TODO Auto-generated constructor stub
        Tools_DataRedirection out = new Tools_DataRedirection (this);
        System.setOut (new PrintStream (out));//设置输出重定向
        System.setErr(new PrintStream(out));//将错误输出也重定向,用于e.pritnStackTrace 

    }

}