JDK 11 java.base.jmod is the JMOD file for JDK 11 Base module.

JDK 11 Base module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\java.base.jmod.

JDK 11 Base module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Base module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\java.base.

You can click and view the content of each source code file in the list below.

⏎ java/io/UnsupportedEncodingException.java

/*
 * Copyright (c) 1996, 2008, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package java.io;

/**
 * The Character Encoding is not supported.
 *
 * @author  Asmus Freytag
 * @since   1.1
 */
public class UnsupportedEncodingException
    extends IOException
{
    private static final long serialVersionUID = -4274276298326136670L;

    /**
     * Constructs an UnsupportedEncodingException without a detail message.
     */
    public UnsupportedEncodingException() {
        super();
    }

    /**
     * Constructs an UnsupportedEncodingException with a detail message.
     * @param s Describes the reason for the exception.
     */
    public UnsupportedEncodingException(String s) {
        super(s);
    }
}

⏎ java/io/UnsupportedEncodingException.java

Or download all of them as a single archive file:

File name: java.base-11.0.1-src.zip
File size: 8740354 bytes
Release date: 2018-11-04
Download 

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