JDK 1.1 source code directory contains Java source code for JDK 1.1 core classes: "C:\fyicenter\jdk-1.1.8\src".

Here is the list of Java classes of the JDK 1.1 source code:

⏎ java/lang/NullPointerException.java

/*
 * @(#)NullPointerException.java	1.13 01/12/10
 *
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package java.lang;

/**
 * Thrown when an application attempts to use <code>null</code> in a 
 * case where an object is required. These include: 
 * <ul>
 * <li>Calling the instance method of a <code>null</code> object. 
 * <li>Accessing or modifying the field of a <code>null</code> object. 
 * <li>Taking the length of <code>null</code> as if it were an array. 
 * <li>Accessing or modifying the slots of <code>null</code> as if it 
 *     were an array. 
 * <li>Throwing <code>null</code> as if it were a <code>Throwable</code> 
 *     value. 
 * </ul>
 * <p>
 * Applications should throw instances of this class to indicate 
 * other illegal uses of the <code>null</code> object. 
 *
 * @author  unascribed
 * @version 1.13, 12/10/01
 * @since   JDK1.0
 */
public
class NullPointerException extends RuntimeException {
    /**
     * Constructs a <code>NullPointerException</code> with no detail message.
     *
     * @since   JDK1.0
     */
    public NullPointerException() {
	super();
    }

    /**
     * Constructs a <code>NullPointerException</code> with the specified 
     * detail message. 
     *
     * @param   s   the detail message.
     * @since   JDK1.0
     */
    public NullPointerException(String s) {
	super(s);
    }
}

⏎ java/lang/NullPointerException.java

Or download all of them as a single archive file:

File name: jdk-1.1.8-src.zip
File size: 1574187 bytes
Release date: 2018-11-16
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