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JDK 17 java.base.jmod - Base Module
JDK 17 java.base.jmod is the JMOD file for JDK 17 Base module.
JDK 17 Base module compiled class files are stored in \fyicenter\jdk-17.0.5\jmods\java.base.jmod.
JDK 17 Base module compiled class files are also linked and stored in the \fyicenter\jdk-17.0.5\lib\modules JImage file.
JDK 17 Base module source code files are stored in \fyicenter\jdk-17.0.5\lib\src.zip\java.base.
You can click and view the content of each source code file in the list below.
✍: FYIcenter
⏎ java/lang/ref/SoftReference.java
/* * Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package java.lang.ref; /** * Soft reference objects, which are cleared at the discretion of the garbage * collector in response to memory demand. Soft references are most often used * to implement memory-sensitive caches. * * <p> Suppose that the garbage collector determines at a certain point in time * that an object is <a href="package-summary.html#reachability">softly * reachable</a>. At that time it may choose to clear atomically all soft * references to that object and all soft references to any other * softly-reachable objects from which that object is reachable through a chain * of strong references. At the same time or at some later time it will * enqueue those newly-cleared soft references that are registered with * reference queues. * * <p> All soft references to softly-reachable objects are guaranteed to have * been cleared before the virtual machine throws an * {@code OutOfMemoryError}. Otherwise no constraints are placed upon the * time at which a soft reference will be cleared or the order in which a set * of such references to different objects will be cleared. Virtual machine * implementations are, however, encouraged to bias against clearing * recently-created or recently-used soft references. * * <p> Direct instances of this class may be used to implement simple caches; * this class or derived subclasses may also be used in larger data structures * to implement more sophisticated caches. As long as the referent of a soft * reference is strongly reachable, that is, is actually in use, the soft * reference will not be cleared. Thus a sophisticated cache can, for example, * prevent its most recently used entries from being discarded by keeping * strong referents to those entries, leaving the remaining entries to be * discarded at the discretion of the garbage collector. * * @author Mark Reinhold * @since 1.2 */ public class SoftReference<T> extends Reference<T> { /** * Timestamp clock, updated by the garbage collector */ private static long clock; /** * Timestamp updated by each invocation of the get method. The VM may use * this field when selecting soft references to be cleared, but it is not * required to do so. */ private long timestamp; /** * Creates a new soft reference that refers to the given object. The new * reference is not registered with any queue. * * @param referent object the new soft reference will refer to */ public SoftReference(T referent) { super(referent); this.timestamp = clock; } /** * Creates a new soft reference that refers to the given object and is * registered with the given queue. * * @param referent object the new soft reference will refer to * @param q the queue with which the reference is to be registered, * or {@code null} if registration is not required * */ public SoftReference(T referent, ReferenceQueue<? super T> q) { super(referent, q); this.timestamp = clock; } /** * Returns this reference object's referent. If this reference object has * been cleared, either by the program or by the garbage collector, then * this method returns {@code null}. * * @return The object to which this reference refers, or * {@code null} if this reference object has been cleared */ public T get() { T o = super.get(); if (o != null && this.timestamp != clock) this.timestamp = clock; return o; } }
⏎ java/lang/ref/SoftReference.java
Or download all of them as a single archive file:
File name: java.base-17.0.5-src.zip File size: 8883851 bytes Release date: 2022-09-13 Download
2023-09-26, 44563👍, 1💬
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