build with something newer than Java 11 #1
Description
By looking up major version: 55 from the output below in the table at https://en.wikipedia.org/wiki/Java_class_file we can see that https://repo1.maven.org/maven2/org/dataverse/test/hello/0.0.8/hello-0.0.8.jar was compiled using Java 11, which is defined here:
https://github.com/gdcc/maven-parent/blob/0.12.4/pom.xml#L118
We should probably override this with a never version of Java.
% javap -verbose org/dataverse/test/hello/Hello.class
Classfile /Users/pdurbin/github/gdcc/exporter-croissant/org/dataverse/test/hello/Hello.class
Last modified Sep 11, 2025; size 569 bytes
SHA-256 checksum 14136e1a4e531dedfa149685cc5ec74b4e4599243120a9290651fae40af7dc12
Compiled from "Hello.java"
public class org.dataverse.test.hello.Hello
minor version: 0
major version: 55
flags: (0x0021) ACC_PUBLIC, ACC_SUPER
this_class: #21 // org/dataverse/test/hello/Hello
super_class: #2 // java/lang/Object
interfaces: 0, fields: 0, methods: 2, attributes: 1
Constant pool:
#1 = Methodref #2.#3 // java/lang/Object."<init>":()V
#2 = Class #4 // java/lang/Object
#3 = NameAndType #5:#6 // "<init>":()V
#4 = Utf8 java/lang/Object
#5 = Utf8 <init>
#6 = Utf8 ()V
#7 = Fieldref #8.#9 // java/lang/System.out:Ljava/io/PrintStream;
#8 = Class #10 // java/lang/System
#9 = NameAndType #11:#12 // out:Ljava/io/PrintStream;
#10 = Utf8 java/lang/System
#11 = Utf8 out
#12 = Utf8 Ljava/io/PrintStream;
#13 = String #14 // Hello World!
#14 = Utf8 Hello World!
#15 = Methodref #16.#17 // java/io/PrintStream.println:(Ljava/lang/String;)V
#16 = Class #18 // java/io/PrintStream
#17 = NameAndType #19:#20 // println:(Ljava/lang/String;)V
#18 = Utf8 java/io/PrintStream
#19 = Utf8 println
#20 = Utf8 (Ljava/lang/String;)V
#21 = Class #22 // org/dataverse/test/hello/Hello
#22 = Utf8 org/dataverse/test/hello/Hello
#23 = Utf8 Code
#24 = Utf8 LineNumberTable
#25 = Utf8 LocalVariableTable
#26 = Utf8 this
#27 = Utf8 Lorg/dataverse/test/hello/Hello;
#28 = Utf8 main
#29 = Utf8 ([Ljava/lang/String;)V
#30 = Utf8 args
#31 = Utf8 [Ljava/lang/String;
#32 = Utf8 SourceFile
#33 = Utf8 Hello.java
{
public org.dataverse.test.hello.Hello();
descriptor: ()V
flags: (0x0001) ACC_PUBLIC
Code:
stack=1, locals=1, args_size=1
0: aload_0
1: invokespecial #1 // Method java/lang/Object."<init>":()V
4: return
LineNumberTable:
line 3: 0
LocalVariableTable:
Start Length Slot Name Signature
0 5 0 this Lorg/dataverse/test/hello/Hello;
public static void main(java.lang.String[]);
descriptor: ([Ljava/lang/String;)V
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=2, locals=1, args_size=1
0: getstatic #7 // Field java/lang/System.out:Ljava/io/PrintStream;
3: ldc #13 // String Hello World!
5: invokevirtual #15 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
8: return
LineNumberTable:
line 6: 0
line 7: 8
LocalVariableTable:
Start Length Slot Name Signature
0 9 0 args [Ljava/lang/String;
}
SourceFile: "Hello.java"