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load a reference onto the stack from a local variable #index: aload_0 2a 0010 1010 → objectref load a reference onto the stack from local variable 0 aload_1 2b 0010 1011 → objectref load a reference onto the stack from local variable 1 aload_2 2c 0010 1100 → objectref load a reference onto the stack from local variable 2 aload_3 2d 0010 1101
Load the element with type native int at index onto the top of the stack as a native int. Object model instruction 0x90 ldelem.i1: Load the element with type int8 at index onto the top of the stack as an int32. Object model instruction 0x92 ldelem.i2: Load the element with type int16 at index onto the top of the stack as an int32.
Java bytecode is the instruction set of the Java virtual machine (JVM), the language to which Java and other JVM-compatible source code is compiled. [1] Each instruction is represented by a single byte , hence the name bytecode , making it a compact form of data .
A leading Java IDE with built-in code inspection and analysis. Plugins for Checkstyle, FindBugs, and PMD. JArchitect: 2017-06-11 No; proprietary Simplifies managing a complex code base by analyzing and visualizing code dependencies, defining design rules, doing impact analysis, and by comparing different versions of the code. Jtest: 2019-05-21
Supported coverage types: class, method, line, basic block. EMMA can detect when a single source code line is covered only partially. Coverage stats are aggregated at method, class, package, and "all classes" levels. Output report types: plain text, HTML, XML. All report types support drill-down, to a user-controlled detail depth.
method name: The string name of a method. When compiled, the address of the method is calculated and put into the constant pool. This operand is then replaced with the 2-byte index (in the constant pool) of the address. constant name: The string name of a constant. Compiled to a 2-byte index. N/A: This instruction takes no operands.
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Overview of a Java virtual machine (JVM) architecture based on The Java Virtual Machine Specification Java SE 7 Edition A Java virtual machine ( JVM ) is a virtual machine that enables a computer to run Java programs as well as programs written in other languages that are also compiled to Java bytecode .