String s1 = new StringBuilder().append("計算機").append("軟件").toString();
System.out.println(s1.intern() == s1);
String s2 = new StringBuilder().append("ja").append("va").toString();
System.out.println(s2.intern() == s2);

輸出結果

true
false

第一個true我能理解，但是那個為什么第二個是false呢，書里面說“java”在stringbuilder.tostring()之前已經(jīng)出現(xiàn)過。我javap查看后

Constant pool:
   #1 = Methodref          #14.#27        // java/lang/Object."<init>":()V
   #2 = Class              #28            // java/lang/StringBuilder
   #3 = Methodref          #2.#27         // java/lang/StringBuilder."<init>":()V
   #4 = String             #29            // 計算機
   #5 = Methodref          #2.#30         // java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
   #6 = String             #31            // 軟件
   #7 = Methodref          #2.#32         // java/lang/StringBuilder.toString:()Ljava/lang/String;
   #8 = Fieldref           #33.#34        // java/lang/System.out:Ljava/io/PrintStream;
   #9 = Methodref          #35.#36        // java/lang/String.intern:()Ljava/lang/String;
  #10 = Methodref          #37.#38        // java/io/PrintStream.println:(Z)V
  #11 = String             #39            // ja
  #12 = String             #40            // va
  #13 = Class              #41            // TestPool
  #14 = Class              #42            // java/lang/Object
  #15 = Utf8               <init>
  #16 = Utf8               ()V
  #17 = Utf8               Code
  #18 = Utf8               LineNumberTable
  #19 = Utf8               main
  #20 = Utf8               ([Ljava/lang/String;)V
  #21 = Utf8               StackMapTable
  #22 = Class              #43            // "[Ljava/lang/String;"
  #23 = Class              #44            // java/lang/String
  #24 = Class              #45            // java/io/PrintStream
  #25 = Utf8               SourceFile
  #26 = Utf8               TestPool.java
  #27 = NameAndType        #15:#16        // "<init>":()V
  #28 = Utf8               java/lang/StringBuilder
  #29 = Utf8               計算機
  #30 = NameAndType        #46:#47        // append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
  #31 = Utf8               軟件
  #32 = NameAndType        #48:#49        // toString:()Ljava/lang/String;
  #33 = Class              #50            // java/lang/System
  #34 = NameAndType        #51:#52        // out:Ljava/io/PrintStream;
  #35 = Class              #44            // java/lang/String
  #36 = NameAndType        #53:#49        // intern:()Ljava/lang/String;
  #37 = Class              #45            // java/io/PrintStream
  #38 = NameAndType        #54:#55        // println:(Z)V
  #39 = Utf8               ja
  #40 = Utf8               va
  #41 = Utf8               TestPool
  #42 = Utf8               java/lang/Object
  #43 = Utf8               [Ljava/lang/String;
  #44 = Utf8               java/lang/String
  #45 = Utf8               java/io/PrintStream
  #46 = Utf8               append
  #47 = Utf8               (Ljava/lang/String;)Ljava/lang/StringBuilder;
  #48 = Utf8               toString
  #49 = Utf8               ()Ljava/lang/String;
  #50 = Utf8               java/lang/System
  #51 = Utf8               out
  #52 = Utf8               Ljava/io/PrintStream;
  #53 = Utf8               intern
  #54 = Utf8               println
  #55 = Utf8               (Z)V

請問那個最初的“java”字面量在哪？