foo/B.java
package foo;
// We change this modifier to non-public.
public class B {
}
bar/C.java
package bar;
import foo.B;
public class C {
public static void main(String[] arguments) {
B[][] a = new B[3][3];
System.out.println(a);
}
}
suztomo-macbookpro44% java -cp target/classes:b-public.jar bar.C
Exception in thread "main" java.lang.IllegalAccessError: tried to access class foo.B from class bar.C
at bar.C.main(C.java:26)
suztomo-macbookpro44% java -cp target/classes:b-public.jar bar.C
Exception in thread "main" java.lang.IllegalAccessError: tried to access class foo.B from class bar.C
at bar.C.main(C.java:26)
suztomo-macbookpro44% javap -verbose -cp b-public.jar bar.C
Classfile jar:file:/Users/suztomo/wsgenoptions/b-public.jar!/bar/C.class
Last modified Sep 16, 2020; size 541 bytes
MD5 checksum 9387d78c144740aca3a20a24512662cf
Compiled from "C.java"
public class bar.C
minor version: 0
major version: 52
flags: ACC_PUBLIC, ACC_SUPER
Constant pool:
#1 = Methodref #6.#22 // java/lang/Object."<init>":()V
#2 = Class #19 // "[[Lfoo/B;"
#3 = Fieldref #23.#24 // java/lang/System.out:Ljava/io/PrintStream;
#4 = Methodref #25.#26 // java/io/PrintStream.println:(Ljava/lang/Object;)V
#5 = Class #27 // bar/C
#6 = Class #28 // java/lang/Object
#7 = Utf8 <init>
#8 = Utf8 ()V
#9 = Utf8 Code
#10 = Utf8 LineNumberTable
#11 = Utf8 LocalVariableTable
#12 = Utf8 this
#13 = Utf8 Lbar/C;
#14 = Utf8 main
#15 = Utf8 ([Ljava/lang/String;)V
#16 = Utf8 arguments
#17 = Utf8 [Ljava/lang/String;
#18 = Utf8 a
#19 = Utf8 [[Lfoo/B;
#20 = Utf8 SourceFile
#21 = Utf8 C.java
#22 = NameAndType #7:#8 // "<init>":()V
#23 = Class #29 // java/lang/System
#24 = NameAndType #30:#31 // out:Ljava/io/PrintStream;
#25 = Class #32 // java/io/PrintStream
#26 = NameAndType #33:#34 // println:(Ljava/lang/Object;)V
#27 = Utf8 bar/C
#28 = Utf8 java/lang/Object
#29 = Utf8 java/lang/System
#30 = Utf8 out
#31 = Utf8 Ljava/io/PrintStream;
#32 = Utf8 java/io/PrintStream
#33 = Utf8 println
#34 = Utf8 (Ljava/lang/Object;)V
{
public bar.C();
descriptor: ()V
flags: 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 24: 0
LocalVariableTable:
Start Length Slot Name Signature
0 5 0 this Lbar/C;
public static void main(java.lang.String[]);
descriptor: ([Ljava/lang/String;)V
flags: ACC_PUBLIC, ACC_STATIC
Code:
stack=2, locals=2, args_size=1
0: iconst_3
1: iconst_3
2: multianewarray #2, 2 // class "[[Lfoo/B;"
6: astore_1
7: getstatic #3 // Field java/lang/System.out:Ljava/io/PrintStream;
10: aload_1
11: invokevirtual #4 // Method java/io/PrintStream.println:(Ljava/lang/Object;)V
14: return
LineNumberTable:
line 26: 0
line 27: 7
line 28: 14
LocalVariableTable:
Start Length Slot Name Signature
0 15 0 arguments [Ljava/lang/String;
7 8 1 a [[Lfoo/B;
}
SourceFile: "C.java"
The multianewarray in 2: multianewarray #2, 2 // class "[[Lfoo/B;" throws the exception.