Merge pull request #9464 from alimate/BAEL-4146

BAEL-4146: How Much Space boolean and boolean[] consumes?

core-java-modules/core-java-jvm/pom.xml

@@ -65,7 +65,12 @@
             <groupId>org.apache.bcel</groupId>
             <artifactId>bcel</artifactId>
             <version>${bcel.version}</version>
-        </dependency>    
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jol</groupId>
+            <artifactId>jol-core</artifactId>
+            <version>${jol-core.version}</version>
+        </dependency>
     </dependencies>
 
     <properties>
@@ -74,6 +79,7 @@
         <javaassist.version>3.27.0-GA</javaassist.version>
         <esapi.version>2.1.0.1</esapi.version>
         <sun.tools.version>1.8.0</sun.tools.version>
+        <jol-core.version>0.10</jol-core.version>
         <asm.version>8.0.1</asm.version>
         <bcel.version>6.5.0</bcel.version>
     </properties>

core-java-modules/core-java-jvm/src/test/java/com/baeldung/boolsize/BooleanSizeUnitTest.java

@@ -0,0 +1,25 @@
+package com.baeldung.boolsize;
+
+import org.junit.Test;
+import org.openjdk.jol.info.ClassLayout;
+import org.openjdk.jol.vm.VM;
+
+public class BooleanSizeUnitTest {
+
+    @Test
+    public void printingTheVMDetails() {
+        System.out.println(VM.current().details());
+    }
+
+    @Test
+    public void printingTheBoolWrapper() {
+        System.out.println(ClassLayout.parseClass(BooleanWrapper.class).toPrintable());
+    }
+
+    @Test
+    public void printingTheBoolArray() {
+        boolean[] value = new boolean[3];
+
+        System.out.println(ClassLayout.parseInstance(value).toPrintable());
+    }
+}

core-java-modules/core-java-jvm/src/test/java/com/baeldung/boolsize/BooleanWrapper.java

@@ -0,0 +1,5 @@
+package com.baeldung.boolsize;
+
+class BooleanWrapper {
+    private boolean value;
+}