JRE 8 rt.jar is the JAR file for JRE 8 RT (Runtime) libraries. JRE (Java Runtime) 8 is the runtime environment included in JDK 8. JRE 8 rt.jar libraries are divided into 6 packages:

com.* - Internal Oracle and Sun Microsystems libraries
java.* - Standard Java API libraries.
javax.* - Extended Java API libraries.
jdk.* -  JDK supporting libraries.
org.* - Third party libraries.
sun.* - Old libraries developed by Sun Microsystems.

JAR File Information:

Directory of C:\fyicenter\jdk-1.8.0_191\jre\lib
      63,596,151 rt.jar

Here is the list of Java classes of the com.* package in JRE 1.8.0_191 rt.jar. Java source codes are also provided.

⏎ com/sun/jmx/snmp/agent/SnmpEntryOid.java

/*
 * Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package com.sun.jmx.snmp.agent;

import com.sun.jmx.snmp.SnmpOid;

/**
 * This class only adds a new constructor to SnmpOid...
 *
 **/
class SnmpEntryOid extends SnmpOid {
    private static final long serialVersionUID = 9212653887791059564L;

    /**
     * Constructs a new <CODE>SnmpOid</CODE> from the specified
     * component array, starting at given position.
     *
     * @param oid   The original OID array
     * @param start The position at which to begin.
     *
     **/
    public SnmpEntryOid(long[] oid, int start) {
        final int subLength = oid.length - start;
        final long[] subOid = new long[subLength];
        java.lang.System.arraycopy(oid, start, subOid, 0, subLength) ;
        components = subOid;
        componentCount = subLength;
    }
}

⏎ com/sun/jmx/snmp/agent/SnmpEntryOid.java

Or download all of them as a single archive file:

File name: jre-rt-com-1.8.0_191-src.zip
File size: 8099783 bytes
Release date: 2018-10-28
Download 

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