JVM指令助记符

变量到操作数栈：iload,iload_,lload,lload_,fload,fload_,dload,dload_,aload,aload_
操作数栈到变量：istore,istore_,lstore,lstore_,fstore,fstore_,dstore,dstor_,astore,astore_
常数到操作数栈：bipush,sipush,ldc,ldc_w,ldc2_w,aconst_null,iconst_ml,iconst_,lconst_,fconst_,dconst_
加：iadd,ladd,fadd,dadd
减：is ,ls ,fs ,ds
乘：imul,lmul,fmul,dmul
除：idiv,ldiv,fdiv,ddiv
余数：irem,lrem,frem,drem
取负：ineg,lneg,fneg,dneg
移位：ishl,lshr,iushr,lshl,lshr,lushr
按位或：ior,lor
按位与：iand,land
按位异或：ixor,lxor
类型转换：i2l,i2f,i2d,l2f,l2d,f2d(放宽数值转换) i2b,i2c,i2s,l2i,f2i,f2l,d2i,d2l,d2f(缩窄数值转换)
创建类实便：new
创建新数组：newarray,anewarray,multianwarray
访问类的域和类实例域：getfield,putfield,getstatic,putstatic
把数据装载到操作数栈：baload,caload,saload,iaload,laload,faload,daload,aaload
从操作数栈存存储到数组：bastore,castore,sastore,iastore,lastore,fastore,dastore,aastore
获取数组长度：arraylength
检相类实例或数组属性：instanceof,checkcast
操作数栈管理：pop,pop2,dup,dup2,dup_xl,dup2_xl,dup_x2,dup2_x2,swap
有条件转移：ifeq,iflt,ifle,ifne,ifgt,ifge,ifnull,ifnonnull,if_icmpeq,if_icmpene, if_icmplt,if_icmpgt,if_icmple,if_icmpge,if_acmpeq,if_acmpne,lcmp,fcmpl fcmpg,dcmpl,dcmpg
复合条件转移：tableswitch,lookupswitch
无条件转移：goto,goto_w,jsr,jsr_w,ret
调度对象的实便方法：invokevirt l
调用由接口实现的方法：invokeinterface
调用需要特殊处理的实例方法：invokespecial
调用命名类中的静态方法：invokestatic
方法返回：ireturn,lreturn,freturn,dreturn,areturn,return
异常：athrow finally
关键字的实现使用：jsr,jsr_w,ret
javap
-help Prints out help message for javap. -l Prints out line and local variable tables. -b Ensures backward compatibility with javap in JDK 1.1. -p lic Shows only p lic classes and members. -protected Shows only protected and p lic classes and members. -package Shows only package, protected, and p lic classes and members. This is the default. -private Shows all classes and members. -Jflag Pass flag directly to the runtime system. Some examples:
javap -J-version javap -J-Djava.security.manager -J-Djava.security.policy=MyPolicy MyClassName
-s Prints internal type signatures. -c Prints out disassembled code, i.e., the instr tions that comprise the Java bytecodes, for each of the methods in the class. These are documented in the Java Virt l Machine Specification. -verbose Prints stack size, number of locals and args for methods. -classpath path Specifies the path javap uses to look up classes. Overrides the default or the CLASSPATH environment variable if it is set. Directories are separated by semi-colons. Thus the general format for path is: .; For example: .;C:\usrs\dac\classes;C:\tools\java\classes -bootclasspath path Specifies path from which to load bootstrap classes. By default, the bootstrap classes are the classes implementing the core Java platform located in jre\lib\rt.jar and several other jar files. -extdirs dirs Overrides location at which installed extensions are searched for. The default location for extensions is the val of java.ext.dirs.

原文链接：http://blog.csdn.net/wangxf_8341/article/details/50402525