Questions tagged [javap]
javap - The Java Class File Disassembler
javap
125
questions
1
vote
0
answers
56
views
What does stack=1 (or any integer value) mean in Java bytecode [duplicate]
I've been trying to understand how the bytecode of the following Java code works. I couldn't find the explanation of what the stack=1 and the stack=4 part mean.
Java Code:
public class ...
- 57
4
votes
4
answers
20k
views
JDK installed but no javap?
I have the JDK 10.0.2 installed, have the cmd opened in the folder of the class files of my program and try the command: javap Simulation.class .
I get the error that the command javap is not found. ...
- 101
2
votes
1
answer
83
views
Why bytecode sequence number are not continuous
static void heapVar();
Code:
0: iconst_3
1: newarray int
3: dup
4: iconst_0
5: bipush 100
7: iastore
8: dup
9: iconst_1
10: sipush 200
13: iastore
14: ...
- 476
-2
votes
1
answer
633
views
I am trying javap -p classname on scala class but getting error in REPL
scala> class Department( val departmentId: Int, val departmentName: String)
defined class Department
scala> javap -p Department
<console>:12: error: not found: value javap
javap -p ...
-1
votes
1
answer
47
views
Java byte code classes interpretation
I understand the basic Java bytecode instructions and how fields are referred from the constant pool.
But I cannot make my mind around the differences between these 2 lines:
java/lang/StringBuilder....
- 337
0
votes
0
answers
693
views
use javap from within a java program on all the files
I have to implement javap -verbose from within a java program, the directory named folder has multiple classes and i want to use this javap -verbose on all of them so i do,
Process p = Runtime....
3
votes
0
answers
470
views
View javap -c output within IntelliJ
I'd like to view Java bytecode the way the command javap -c outputs it, not like the "View Bytecode Plugin". Is there a way to accomplish this?
Example: This method
public void increment() {
c++;...
- 4,813
0
votes
0
answers
841
views
javap not showing the annotation information in the decompiled class
I have a jar with a simple java class like below
package org.debraj.pkgcmp.dummy;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import com.google.common....
- 6,539
0
votes
1
answer
215
views
Is it possible to estimate performance or cyclomatic complexity from decompiled code?
Let's say I have two alternative implementations of an algorithm, or two strategies. I could of course benchmark them with e.g. jmh. But is there any information I could get by looking at the ...
- 3,133
1
vote
1
answer
395
views
Javap -l does not show me my local variable table
For some reason, Command prompt isn't providing me with a local variable table, even though I am using the -l option. Any suggestion/points?
Edit, here is the code for SumSqrt class:
public class ...
- 45
1
vote
0
answers
1k
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how to map bytecode line number to sourcecode line number
I'm creating a program to find null pointer dereference in java. The methodology used is to first extract java byte code using javap command and then extract control flow graph(CFG) information from ...
- 161
0
votes
1
answer
580
views
Bad local StackMapTable
I've generated a simple getter method with ASM in an already existent class.
mv = cn.visitMethod(access, // public method
"get_" + f.name, // name
...
- 102
4
votes
2
answers
293
views
In java we can explore a java class, methods by using javap disassembeler. how to do the same in c++?
I'm new to this community so, if I'm violating any t&c of our community by asking this question in wrong section, then I'm sorry.
I've been searching answers for the above question for quite a ...
- 154
-1
votes
1
answer
207
views
Object.clone() in javap when using covariant return types in Java
I am reading about covariant return types in Java. I wrote the following code:
A parent class:
package other;
public class Super implements Cloneable {
@Override
public Super clone() ...
- 6,179
0
votes
1
answer
82
views
Understanding Type in Compiled Scala File
Given:
$cat build.sbt
scalaVersion := "2.12.1"
$cat src/main/scala/net/X.scala
package net
trait Foo
object X {
val a: Int with Foo = 42.asInstanceOf[Int with Foo]
println(a + a)
}
...
- 41.7k