JAF 1.2.0 Java Source Code Files are important if you want to compile them with different JDK releases.

You can get JAF 1.2.0 Java Source Code Files from JAF GitHub Website in the "activation/src/main/java/" folder.

You can also browse JAF 1.2.0 Client Source Code files below:

⏎ com/sun/activation/viewers/TextEditor.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2017 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://oss.oracle.com/licenses/CDDL+GPL-1.1
 * or LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.activation.viewers;

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.beans.*;
import javax.activation.*;

public class TextEditor extends Panel implements CommandObject,
    ActionListener {
	// UI Vars...
    private TextArea text_area = null;
    private GridBagLayout panel_gb = null;
    private Panel button_panel = null;
    private Button save_button = null;
	// File Vars
    private File text_file = null;
    private String text_buffer = null;
    private InputStream data_ins = null;
    private FileInputStream fis = null;
	
    private DataHandler _dh = null;
    private boolean DEBUG = false;
	/**
	 * Constructor
	 */
    public TextEditor() {
	panel_gb = new GridBagLayout();
	setLayout(panel_gb);
	
	button_panel = new Panel();
	//	button_panel.setBackground(Color.white);
	button_panel.setLayout( new FlowLayout() );
	save_button = new Button("SAVE");
	button_panel.add(save_button);
	addGridComponent(this,
			 button_panel,
			 panel_gb,
			 0,0,
			 1,1,
			 1,0);
	
	// create the text area
	text_area = new TextArea("This is text",24, 80, 
				 TextArea.SCROLLBARS_VERTICAL_ONLY );
	//	text_area.setBackground(Color.lightGray);
	text_area.setEditable( true );
	
	addGridComponent(this,
			 text_area,
			 panel_gb,
			 0,1,
			 1,2,
			 1,1);
	
	// add listeners
	save_button.addActionListener( this );
	
    }

    ////////////////////////////////////////////////////////////////////////
	/**
	 * adds a component to our gridbag layout
	 */
    private void addGridComponent(Container cont, 
				  Component comp,
				  GridBagLayout mygb,
				  int gridx,
				  int gridy, 
				  int gridw,
				  int gridh,
				  int weightx,
				  int weighty) { 
	GridBagConstraints c = new GridBagConstraints(); 
	c.gridx = gridx; 
	c.gridy = gridy; 
	c.gridwidth = gridw; 
	c.gridheight = gridh; 
	c.fill = GridBagConstraints.BOTH;
	c.weighty = weighty;
	c.weightx = weightx;
	c.anchor =  GridBagConstraints.CENTER;
	mygb.setConstraints(comp, c); 
	cont.add(comp); 
    }
	
  //--------------------------------------------------------------------
    public void setCommandContext(String verb, DataHandler dh) throws IOException {
	_dh = dh;
	this.setInputStream( _dh.getInputStream() );

    }
  //--------------------------------------------------------------------

  /**
   * set the data stream, component to assume it is ready to
   * be read.
   */
    public void setInputStream(InputStream ins) throws IOException {
	
	byte data[] = new byte[1024];
	ByteArrayOutputStream baos = new ByteArrayOutputStream();
	int bytes_read = 0;
	// check that we can actually read
	
	while((bytes_read = ins.read(data)) >0)
	    baos.write(data, 0, bytes_read);
	ins.close();

      
	// convert the buffer into a string
	// popuplate the buffer
	text_buffer = baos.toString();

	// place in the text area
	text_area.setText(text_buffer);
    }
    ///////////////////////////////////////////////////////////////////////
    private void performSaveOperation(){
	OutputStream fos = null;
	try {
	    fos = _dh.getOutputStream();
	} catch (Exception e) {}
	
	String buffer = text_area.getText();
	
	// make sure we got one
	if(fos == null) {
	    System.out.println("Invalid outputstream in TextEditor!");
	    System.out.println("not saving!");
	    return;
	}
	
	try {
	    fos.write( buffer.getBytes() );
	    fos.flush(); // flush it!
	    fos.close(); // close it!
	} catch(IOException e)
	    {
		System.out.println("TextEditor Save Operation failed with: " + e);
	    }
	
    }
  //--------------------------------------------------------------------
    public void addNotify() {
	super.addNotify();
	invalidate();
    }
  //--------------------------------------------------------------------
    public Dimension getPreferredSize()	{
	return text_area.getMinimumSize(24, 80);
    }
	/////////////////////////////////////////////////////////////////////
	// for ActionListener
    public void actionPerformed(ActionEvent evt){
	if(evt.getSource() == save_button) { // save button pressed!
	    
	    // Save ourselves
	    this.performSaveOperation();
	}
    }
	
}

⏎ com/sun/activation/viewers/TextEditor.java

Or download all of them as a single archive file:

File name: javax.activation-1.2.0-fyi.zip
File size: 78269 bytes
Release date: 2018-09-07
Download 

⇒ Older Releases of JAF (JavaBeans Activation Framework)

⇐ JAF 1.2.0 JAR File - javax.activation-1.2.0.jar

⇑ Downloading activation.jar - JavaBeans Activation Framework

⇑⇑ activation.jar - JAF (JavaBeans Activation Framework)