From 70efcc0d2b9accede4af77a8a3e45f05e7eefacd Mon Sep 17 00:00:00 2001
From: Michiel Meeuwissen <michiel.meeuwissen@gmail.com>
Date: Fri, 20 Mar 2026 15:22:53 +0100
Subject: [PATCH] A 'compact' class results in a not accessible exception if we
 don't make the contructor accessible.

---
 .../codehaus/mojo/exec/AbstractExecJavaBase.java   |  1 +
 src/test/java/CompactClass.java                    |  7 +++++++
 .../org/codehaus/mojo/exec/ExecJavaMojoTest.java   | 14 ++++++++++++++
 3 files changed, 22 insertions(+)
 create mode 100644 src/test/java/CompactClass.java

diff --git a/src/main/java/org/codehaus/mojo/exec/AbstractExecJavaBase.java b/src/main/java/org/codehaus/mojo/exec/AbstractExecJavaBase.java
index e32ac197..96451cdc 100644
--- a/src/main/java/org/codehaus/mojo/exec/AbstractExecJavaBase.java
+++ b/src/main/java/org/codehaus/mojo/exec/AbstractExecJavaBase.java
@@ -472,6 +472,7 @@ protected Object newInstance(final Class<?> bootClass)
         if ((constructor.getModifiers() & Modifier.PRIVATE) != 0) {
             throw new NoSuchMethodException("No public constructor found for " + bootClass);
         }
+        constructor.setAccessible(true);
         return constructor.newInstance();
     }
 
diff --git a/src/test/java/CompactClass.java b/src/test/java/CompactClass.java
new file mode 100644
index 00000000..2ca4fb41
--- /dev/null
+++ b/src/test/java/CompactClass.java
@@ -0,0 +1,7 @@
+class CompactClass {
+
+
+    void main() {
+        System.out.println("Hello World");
+    }
+}
diff --git a/src/test/java/org/codehaus/mojo/exec/ExecJavaMojoTest.java b/src/test/java/org/codehaus/mojo/exec/ExecJavaMojoTest.java
index 76ae92a9..d65e19b2 100644
--- a/src/test/java/org/codehaus/mojo/exec/ExecJavaMojoTest.java
+++ b/src/test/java/org/codehaus/mojo/exec/ExecJavaMojoTest.java
@@ -331,6 +331,20 @@ void runWithArgs(ExecJavaMojo mojo) throws Exception {
         assertEquals(expectedResult, resultString);
     }
 
+    /**
+     * Test the commandline parsing facilities of the {@link AbstractExecMojo} class
+     *
+     * @throws Exception if any exception occurs
+     */
+    @Test
+    @InjectMojo(goal = "java")
+    @MojoParameter(name = "mainClass", value = "CompactClass")
+    void runCompact(ExecJavaMojo mojo) throws Exception {
+        String resultString = execute(mojo);
+
+        assertEquals("Hello World", resultString);
+    }
+
     /**
      * Ensures that classpath can be filtered (exclude from plugin deps or project deps) to resolve conflicts.
      *