Questions tagged [javap]
javap - The Java Class File Disassembler
javap
125
questions
9
votes
2
answers
1k
views
Inner Class in Java
I was reading about Inner class in Learning Java. I found this code
class Animal{
class Brain{
}
}
After compiling, javap 'Animal$Brain' gives output as
Compiled from "Animal.java"class
...
- 1,011
0
votes
2
answers
169
views
the constant pool lost #3 in class file
I use "javap -verbose" to parse a class file and find the constant pool lost #3, anybody can tell me the reason?
- 81
0
votes
1
answer
288
views
Getting the arguments for the bytecode using Javassist
The disassembled code (using javap -c) of http://lpaste.net/338173 looks like this: http://lpaste.net/338175 , on the third column, there is 200 as an argument to "sipush" how can I get this from a ...
- 4,900
0
votes
1
answer
558
views
No javap tool not found in Scala REPL
I am using Scala 2.11.6 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_79) on Windows 10.
I did following in REPL
scala> class Book (val title:String)
defined class Book
scala> :javap
:javap [...
- 193
0
votes
1
answer
451
views
Understanding javap output
I have a very simple class:
package MyDev;
public class Point3D {
public Point3D(){x = 0; y = 0;z = 0;}
public float x, y, z;
public Point3D( float X, float Y, float Z )
{
x = ...
- 4,621
2
votes
3
answers
2k
views
Java class has 2 methods with the same function signature but different return types
AFAIK it's not possible to have a method with the same call signature. However:
$ javap -public java.time.LocalTime | grep "minus" | grep "Temporal" | grep -v "long"
public java.time.LocalTime ...
- 53
1
vote
0
answers
2k
views
setting the target version to 1.8 still produce the class files with major version 52
I am trying to compile my java source code to target 1.8. I have set the following in the javac target.
Ant version: Apache Ant(TM) version 1.9.4 compiled on April 29 2014
Java version: 1.8
<...
- 708
3
votes
2
answers
3k
views
Using javap for reading the byte code
I figured out by reading in the internet that java compiles
public class Test {
private String s = "TESTTEST";
}
to
public class Test {
private String s;
public Test() {
s = "...
- 4,617
3
votes
2
answers
378
views
java javap and groovy bytecode comparison
Here is the code generated showed by javap when I asked him to display my compiled class (I selected method)
int multiply(int, int);
flags:
Code:
stack=2, locals=3, args_size=3
0: ...
- 13.2k
0
votes
1
answer
506
views
how do i print class, method details in a jar file using the javap?
I want to list the classes in jars which are using java.lang.String.replace method.
jar tvf <JAR> | awk '{print $8}' | grep class$ | sed 's/\.class$//' | xargs javap
Where <JAR> is the ...
- 1
2
votes
0
answers
62
views
Can I stabilize the output order of functions written by the compiler to bytecode .class files?
If I execute javap on my main application class across compiles (no source change), sometimes the order of functions differs. This is especially true if the build was executed in different ...
- 2,873
5
votes
1
answer
835
views
Is javap missing some line numbers?
If I compile the following source code:
1. public class Example {
2. public boolean foo(boolean a, boolean b, char ch) {
3. if (a && Character.isLetter(ch)
4. || b &&...
- 861
0
votes
2
answers
1k
views
Find out if .class file implements interface [duplicate]
Given the path to a class file, how can I find out if it implements a certain interface?
I could use javap and parse the output, but there are probably more intelligent ways.
I do not want to parse ...
- 35k
0
votes
0
answers
156
views
Visualized javap tool
Hello I've created this tool
And I've added a feature that anyone can search for the info of a class without any package name.
My question is now I want to add info of each method that means I need to ...
- 9
7
votes
1
answer
945
views
Enum disassembled with javap doesn't show constructor arguments
When I disassemble an enum with javap, the enum's implicit constructor arguments seem to be missing, and I can't figure out why.
Here's an enum:
enum Foo { X }
I compile and disassemble this (on ...
- 49.5k