Java 8 字符串垃圾收集

Question

userText 将是一个大约 7000 个字符的不同语言的字符串。我想知道执行此代码后字符串将如何被垃圾收集。假设在 unescapeHtml4 userText 被分配了一个新值之后，与替换后的值相同。

前一个 userText 字符串会发生什么情况。它们会在字符串池中还是会被垃圾收集器删除。

String userText = context.getRequestParameter( "addedText");
if ( someCondition)
{
   userText = StringEscapeUtils.unescapeHtml4( userText ) );
}
else
{
  userText =  userText.replace( charsequence1, charsequence2 );
}

-- 使用 userText 的一些逻辑 ---

Answer 1

//This String object will live as long as "context" will live
String userText = context.getRequestParameter( "addedText"); //"addedText" goes to a String Pool
if ( someCondition)
{
//This String object will live as long as "userText" variable is accessible
   userText = StringEscapeUtils.unescapeHtml4( userText ) );
}
else
{
//This String object will live as long as "userText" variable is accessible
  userText =  userText.replace( charsequence1, charsequence2 );
}

动词“live”意味着对象在GC有权杀死它之前就已经存在;-)