blocks|key|1239273|text|这方面没有专家，但我会试一试。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1239274|String+text+=+"Hello+World";|code-block|syntax|javascript|1239275|​|1239276|📷|atomic|offset|length|1239277|1239278|1239279|1239280|1239281|lcd(load+a常数)在常量池表中查找字符串。发现#2，地址为"Hello+Word“，地址是#14|1239282|参考资料：Java常量池的用途是什么？|1239283|参考资料：字节码/操作码|1239284|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/4dfaf85f390bc313325e7862b483f4b5.png|imageAlt|1|https://developer.qcloudimg.com/http-save/yehe-900000/6fca5aaecfdf4bc28efd040b34b5c71c.png|2|LINK|MUTABLE|url|https://stackoverflow.com/questions/10209952/what-is-the-purpose-of-the-java-constant-pool|3|https://www.ibm.com/developerworks/library/it-haggar_bytecode/#opcode^0|0|0|0|0|1|0|0|0|0|0|1|1|0|0|0|5|E|2|0|5|7|3|0^^$0|@$1|2|3|4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1G|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1H|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|1I|8|@]|9|@$L|1J|M|1K|1|1L]]|A|$]]|$1|N|3|H|5|6|7|1M|8|@]|9|@]|A|$]]|$1|O|3|H|5|6|7|1N|8|@]|9|@]|A|$]]|$1|P|3|J|5|K|7|1O|8|@]|9|@$L|1P|M|1Q|1|1R]]|A|$]]|$1|Q|3|H|5|6|7|1S|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1T|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1U|8|@]|9|@$L|1V|M|1W|1|1X]]|A|$]]|$1|V|3|W|5|6|7|1Y|8|@]|9|@$L|1Z|M|20|1|21]]|A|$]]|$1|X|3|-4|5|6|7|22|8|@]|9|@]|A|$]]]|Y|$Z|$5|10|11|12|A|$13|14|15|-4]]|16|$5|10|11|12|A|$13|17|15|-4]]|18|$5|19|11|1A|A|$1B|1C]]|1D|$5|19|11|1A|A|$1B|1E]]]]

No expert at this but I will give it a shot.

<pre><code>String text = "Hello World";
</code></pre>

<a href="https://i.stack.imgur.com/2FJ50.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2FJ50.png" alt="enter image description here"></a>

<a href="https://i.stack.imgur.com/ez8kH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ez8kH.png" alt="enter image description here"></a>

lcd(load a constant) look ups the string in a constant pool table. found #2 which has an address of "Hello Word" which is at #14

Reference:<a href="https://stackoverflow.com/questions/10209952/what-is-the-purpose-of-the-java-constant-pool">What is the purpose of the Java Constant Pool?</a>

Reference:<a href="https://www.ibm.com/developerworks/library/it-haggar_bytecode/#opcode" rel="nofollow noreferrer">https://www.ibm.com/developerworks/library/it-haggar_bytecode/#opcode</a>

As clear from <a href="http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/java/lang/String.java" rel="nofollow noreferrer">here</a>, the actual characters that comprise a <code>String</code> in Java are actually stored in the <code>private final char value[];</code> character array.

Can someone please help me in understanding the following questions for an expression <code>String text = "Hello World";</code>

<ol>
<li>What is actually stored in StringPool ? I've read many places that its the <code>String</code> literal. If thats the case, what exactly is the difference between a String Object and a String literal as both must be backed by a <code>char[]</code></li>
<li>If the String reference is marked as Constant (final), will it be stored in the <code>Runtime Constant Pool</code> inside the <code>Method Area</code> as well ? </li>
<li>As mentioned <a href="https://dzone.com/articles/string-memory-internals" rel="nofollow noreferrer">here</a>, the actual <code>char[] value</code> is created on the heap only. So when <code>intern()</code> method is called on a <code>String</code> object created using <code>new</code> operator, what will be copied to the StringPool (assuming its not the character array) ?</li>
</ol>

Edit :

As mentioned <a href="https://bugs.java.com/view_bug.do?bug_id=6988220" rel="nofollow noreferrer">here</a>, StringPool is implemented as a HashMap. So what could be the key and value for the same ? It appears that the value cannot be the <code>char[] value</code> as the same is created on the Heap.

String Memory Model - java6

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符。

功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符

功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符

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从中可以清楚地看出，构成String的实际字符实际上存储在private final char value[];字符数组中。有人能帮我理解表达式String text = "Hello World";的下列问题吗？实际存储在StringPool中的是什么？我读过许多地方，它是String文字。如果是这样的话，字符串对象和字符串文本之间的区别到底是什么，因为两者都必须由char[]来支持。如果字符串

问字符串内存模型- java6
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