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 

        
    }

}