diff --git a/src/main/java/org/cloudsimplus/benchmarks/MemoryFootprintBenchmark.java b/src/main/java/org/cloudsimplus/benchmarks/MemoryFootprintBenchmark.java
index c6d13b1..6be02a3 100644
--- a/src/main/java/org/cloudsimplus/benchmarks/MemoryFootprintBenchmark.java
+++ b/src/main/java/org/cloudsimplus/benchmarks/MemoryFootprintBenchmark.java
@@ -23,9 +23,10 @@
  */
 package org.cloudsimplus.benchmarks;
 
+import org.cloudsimplus.cloudlets.Cloudlet;
 import org.cloudsimplus.cloudlets.CloudletSimple;
-import org.cloudsimplus.hosts.HostSimple;
-import org.cloudsimplus.vms.VmSimple;
+import org.cloudsimplus.hosts.Host;
+import org.cloudsimplus.vms.Vm;
 
 import java.util.function.IntFunction;
 
@@ -94,19 +95,19 @@ public static void main(final String[] args) {
         printResult("CloudletSimple", measure(MemoryFootprintBenchmark::newCloudlet));
     }
 
-    private static VmSimple newVm(final int index) {
+    private static Vm newVm(final int index) {
         return ProcessorScenario.newVm(VM_CORES, VM_MIPS);
     }
 
     /// Creates a Host with a single CPU core.
     /// The Host Processor is included in the measured size.
-    private static HostSimple newHost(final int index) {
+    private static Host newHost(final int index) {
         return ProcessorScenario.newHost(HOST_RAM, HOST_BW, HOST_STORAGE, 1, HOST_CORE_MIPS);
     }
 
     /// Creates a Cloudlet with the default utilization models.
-    private static CloudletSimple newCloudlet(final int index) {
-        return new CloudletSimple(CLOUDLET_LENGTH, CLOUDLET_CORES);
+    private static Cloudlet newCloudlet(final int index) {
+        return CloudletSimple.of(CLOUDLET_LENGTH, CLOUDLET_CORES);
     }
 
     /// {@return the median heap (in bytes) retained by each object created by a given function}
diff --git a/src/main/java/org/cloudsimplus/benchmarks/ProcessorScenario.java b/src/main/java/org/cloudsimplus/benchmarks/ProcessorScenario.java
index 7436ca3..8ad9ebc 100644
--- a/src/main/java/org/cloudsimplus/benchmarks/ProcessorScenario.java
+++ b/src/main/java/org/cloudsimplus/benchmarks/ProcessorScenario.java
@@ -78,7 +78,7 @@ final class ProcessorScenario {
 
     ProcessorScenario() {
         simulation = new CloudSimPlus();
-        final var datacenter = new DatacenterSimple(simulation, createHosts(), new VmPlacementPolicyBestFit());
+        final var datacenter = DatacenterSimple.of(simulation, createHosts(), new VmPlacementPolicyBestFit());
         datacenter.setSchedulingInterval(1);
 
         final DatacenterBroker broker = new DatacenterBrokerSimple(simulation);
@@ -121,7 +121,7 @@ private static List<Cloudlet> createCloudlets() {
         final var cloudlets = new ArrayList<Cloudlet>(count);
         for (int i = 0; i < count; i++) {
             final long length = CLOUDLET_MIN_LENGTH * (1 + i % CLOUDLET_LENGTHS);
-            cloudlets.add(new CloudletSimple(length, CLOUDLET_CORES));
+            cloudlets.add(CloudletSimple.of(length, CLOUDLET_CORES));
         }
 
         return cloudlets;
@@ -133,14 +133,14 @@ private static List<Cloudlet> createCloudlets() {
     /// @param storage the storage capacity (in Megabytes)
     /// @param cores the number of CPU cores
     /// @param mips the MIPS capacity of each core
-    static HostSimple newHost(final long ram, final long bw, final long storage, final long cores, final double mips) {
-        return new HostSimple(ram, bw, storage, new CoreCapacity(cores, mips));
+    static Host newHost(final long ram, final long bw, final long storage, final long cores, final double mips) {
+        return HostSimple.of(ram, bw, storage, new CoreCapacity(cores, mips));
     }
 
     /// {@return a new VM}
     /// @param cores the number of CPU cores
     /// @param mips the MIPS capacity of each core
-    static VmSimple newVm(final long cores, final double mips) {
-        return new VmSimple(new CoreCapacity(cores, mips));
+    static Vm newVm(final long cores, final double mips) {
+        return VmSimple.of(new CoreCapacity(cores, mips));
     }
 }
diff --git a/src/main/java/org/cloudsimplus/benchmarks/SimulationTimeBenchmark.java b/src/main/java/org/cloudsimplus/benchmarks/SimulationTimeBenchmark.java
index 3920f6b..44e3b1a 100755
--- a/src/main/java/org/cloudsimplus/benchmarks/SimulationTimeBenchmark.java
+++ b/src/main/java/org/cloudsimplus/benchmarks/SimulationTimeBenchmark.java
@@ -134,7 +134,7 @@ private Datacenter createDatacenter() {
         }
 
         //Uses a VmPlacementPolicySimple by default to place VMs
-        return new DatacenterSimple(simulation, hostList).setSchedulingInterval(-1);
+        return DatacenterSimple.of(simulation, hostList).setSchedulingInterval(-1);
     }
 
     private Host createHost() {
@@ -148,7 +148,7 @@ private Host createHost() {
         Uses ResourceAllocatorSimple by default for RAM and BW allocation
         and VmSchedulerSpaceShared for VM scheduling.
         */
-        return new HostSimple(ram, bw, storage, cpuCapacity);
+        return HostSimple.of(ram, bw, storage, cpuCapacity);
     }
 
     /// Creates a list of VMs.
@@ -156,7 +156,7 @@ private List<Vm> createVms() {
         final List<Vm> list = new ArrayList<>(vmsNumber);
         for (int i = 0; i < vmsNumber; i++) {
             //Uses a CloudletSchedulerTimeShared by default to schedule Cloudlets
-            final Vm vm = new VmSimple(new CoreCapacity(VM_CORES, 1000));
+            final Vm vm = VmSimple.of(new CoreCapacity(VM_CORES, 1000));
             vm.setRam(512).setBw(1000).setSize(10000);
             list.add(vm);
         }
@@ -172,7 +172,7 @@ private List<Cloudlet> createCloudlets() {
         final UtilizationModelDynamic utilizationModel = new UtilizationModelDynamic(0.5);
 
         for (int i = 0; i < cloudletsNumber; i++) {
-            final Cloudlet cloudlet = new CloudletSimple(CLOUDLET_LENGTH, CLOUDLET_CORES, utilizationModel);
+            final Cloudlet cloudlet = CloudletSimple.of(CLOUDLET_LENGTH, CLOUDLET_CORES, utilizationModel);
             cloudlet.setSizes(1024);
             list.add(cloudlet);
         }
diff --git a/src/main/java/org/cloudsimplus/heuristics/CloudletToVmMappingSolutionBenchmark.java b/src/main/java/org/cloudsimplus/heuristics/CloudletToVmMappingSolutionBenchmark.java
index cd33cd1..d77a68d 100755
--- a/src/main/java/org/cloudsimplus/heuristics/CloudletToVmMappingSolutionBenchmark.java
+++ b/src/main/java/org/cloudsimplus/heuristics/CloudletToVmMappingSolutionBenchmark.java
@@ -62,8 +62,8 @@ private CloudletToVmMappingSolution createInstance() {
         UtilizationModel um = UtilizationModel.NULL;
         IntStream.range(0, 100).forEach(i
                 -> result.bindCloudletToVm(
-                        new CloudletSimple(i, 1, 1).setUtilizationModel(um),
-                        new VmSimple(i, new CoreCapacity(1, 1000)))
+                        CloudletSimple.of(i, 1, 1).setUtilizationModel(um),
+                        VmSimple.of(i, new CoreCapacity(1, 1000)))
         );
 
         return result;