initially empty, is maintained privately by the * class {@code String}. * <p> * When the intern method is invoked, if the pool already contains a * string equal to this {@code String} object as
* When the intern method is invoked, if the pool already contains a * string equal to this {@codeString} object as determined by * the {@link#equals(Object)} method, then the string from the pool is * returned. Otherwise, this {@codeString} object is added to the * pool and a re...
When the intern method is invoked, if the pool already contains a string equal to thisStringobject as determined by the {@link #equals(Object)} method, then the string from the pool is returned. Otherwise, thisStringobject is added to the pool and a reference to thisStringobject is returne...
string);jchar*chars=java_lang_String::as_unicode_string(string,length,CHECK_NULL);oop result=intern(h_string,chars,length,CHECK_NULL);returnresult;}...oop StringTable::intern(Handle string_or_null_h,jchar*name,int len,TRAPS){...unsigned int hash=java_lang_String::hash_code(...
java源码 /*** Returns a canonical representation for the string object. * * A pool of strings, initially empty, is maintained privately by the * class String. * * When the intern method is invoked, if the pool already contains a * string equal to this ...
java7 的String.intern() java7中,String.intern()方法做了重要的改变。 首先,字符串池的存储位置从永久带(java8中,方法区(Method area)取代了永久带(PermGen)) 挪到了堆。这样带来了两个重要的影响 1. 字符串常量池中的对象可以被GC 2. 字符串常量池的大小不再受永久带内存大小限制(在jdk6中,永久带的大...
两个new String相加会被优化为StringBuilder，可以通过javac和javap查看汇编指令如下：javac InternTest.javajavap -c InternTest publicclasscom.justin.java.lang.InternTest{ publiccom.justin.java.lang.InternTest();Code:: aload_0 1: invokespecial #1// Method java/lang/Object."<init>":()V4:return...
String##intern()源码 先来看一下intern()方法的JDK源码如下: /** * Returns a canonical representation for the string object. * * A pool of strings, initially empty, is maintained privately by the * class {@code String}. * * When the intern method is invoked, if the pool already contains...
* When the intern method is invoked, if the pool already contains a * string equal to this {@codeString} object as determined by * the {@link#equals(Object)} method, then the string from the pool is * returned. Otherwise, this {@codeString} object is added to the ...
1,JAVA 代码 /** * Returns a canonical representation for the string object. ** A pool of strings, initially empty, is maintained privately by the * classString. ** When the intern method is invoked, if the pool already contains a * string equal to thisString...