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

    }

}