$ javap -v com.fenqile.outbiz.live800.Main Classfile */classes/com/fenqile/outbiz/live800/Main.class Last modified Aug 11, 2016; size 465 bytes MD5 checksum 5571749f566b0de9228a8b1154d52824 Compiled from "Main.java" public class com.fenqile.outbiz.live800.Main SourceFile: "Main.java" minor version: 0 major version: 51 flags: ACC_PUBLIC, ACC_SUPER Constant pool: #1 = Methodref #4.#18 // java/lang/Object."<init>":()V #2 = Methodref #19.#20 // com/alibaba/dubbo/container/Main.main:([Ljava/lang/String;)V #3 = Class #21 // com/fenqile/outbiz/live800/Main #4 = Class #22 // java/lang/Object #5 = Utf8 <init> #6 = Utf8 ()V #7......
最初听说的String、StringBuffer和StringBuilder三者之间的区别主要是下面这个版本： String：字符串常量，字符串长度不可变。Java中String是immutable（不可变）的。用于存放字符的数组被声明为final的，因此只能赋值一次，不可再更改。 StringBuffer：字符串变量（Synchronized，即线程......