Delete ByteBuffer memory check to overcome 32bit archs.

Author: hhontheim

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>net.hontheim</groupId>
     <artifactId>java-memory</artifactId>
-    <version>2.0.0</version>
+    <version>3.0.0</version>
     <packaging>jar</packaging>
 
     <name>java-memory</name>

src/main/java/net/hontheim/MainApp.java

@@ -1,8 +1,6 @@
 package net.hontheim;
 
 import javafx.application.Application;
-import javafx.event.ActionEvent;
-import javafx.event.EventHandler;
 import javafx.geometry.Insets;
 import javafx.geometry.Pos;
 import javafx.scene.Scene;
@@ -11,24 +9,20 @@
 import javafx.scene.layout.GridPane;
 import javafx.stage.Stage;
 
-import java.nio.ByteBuffer;
-
 public class MainApp extends Application {
 
-    private GridPane pane = new GridPane();
-    private Label lblTitle, lblDirectAllocation, lblNativeUsed, lblMaxMemory, lblRuntimeMax, lblRuntimeFree, lblRuntimeTotal;
-    private Label descDirectAllocation, descNativeUsed, descMaxMemory, descRuntimeMax, descRuntimeFree, descRuntimeTotal;
-    private Label valDirectAllocation, valNativeUsed, valMaxMemory, valRuntimeMax, valRuntimeFree, valRuntimeTotal;
+    private final GridPane pane = new GridPane();
+    private Label lblTitle, lblRuntimeMax, lblRuntimeFree, lblRuntimeTotal;
+    private Label descRuntimeMax, descRuntimeFree, descRuntimeTotal;
+    private Label valRuntimeMax, valRuntimeFree, valRuntimeTotal;
     private Button btnUpdate;
 
-    private static ByteBuffer buffer = ByteBuffer.allocateDirect(1024*1024*1024);
-
     public static void main(String[] args) {
         launch(args);
     }
 
     @Override
-    public void start(Stage stage) throws Exception {
+    public void start(Stage stage) {
         stage.setTitle("Java Memory");
         this.initializeComponents();
         this.placeComponents(stage);
@@ -41,21 +35,6 @@ private void initializeComponents() {
         lblTitle = new Label("Java Memory");
         lblTitle.setStyle("-fx-font-size: 18; -fx-font-weight: bold;");
 
-        lblDirectAllocation = new Label("Direct allocation:");
-        lblNativeUsed = new Label("Native memory used:");
-        lblMaxMemory = new Label("Max direct memory:");
-
-        descDirectAllocation = new Label("ByteBuffer.capacity();");
-        descDirectAllocation.setStyle("-fx-font-family: monospace");
-        descNativeUsed = new Label("sun.misc.SharedSecrets.getJavaNioAccess().getDirectBufferPool().getMemoryUsed();");
-        descNativeUsed.setStyle("-fx-font-family: monospace");
-        descMaxMemory = new Label("sun.misc.VM.maxDirectMemory();");
-        descMaxMemory.setStyle("-fx-font-family: monospace");
-
-        valDirectAllocation = new Label();
-        valNativeUsed = new Label();
-        valMaxMemory = new Label();
-
         lblRuntimeMax = new Label("Runtime max memory:");
         lblRuntimeFree = new Label("Runtime free memory:");
         lblRuntimeTotal = new Label("Runtime total memory:");
@@ -82,51 +61,30 @@ private void placeComponents(Stage stage) {
 
         pane.add(lblTitle, 0, 0, 2, 1);
 
-        pane.add(lblDirectAllocation, 0, 2);
-        pane.add(lblNativeUsed, 0, 3);
-        pane.add(lblMaxMemory, 0, 4);
+        pane.add(lblRuntimeMax, 0, 2);
+        pane.add(lblRuntimeFree, 0, 3);
+        pane.add(lblRuntimeTotal, 0, 4);
 
-        pane.add(descDirectAllocation, 1, 2);
-        pane.add(descNativeUsed, 1, 3);
-        pane.add(descMaxMemory, 1, 4);
+        pane.add(descRuntimeMax, 1, 2);
+        pane.add(descRuntimeFree, 1, 3);
+        pane.add(descRuntimeTotal, 1, 4);
 
-        pane.add(valDirectAllocation, 2, 2);
-        pane.add(valNativeUsed, 2, 3);
-        pane.add(valMaxMemory, 2, 4);
+        pane.add(valRuntimeMax, 2, 2);
+        pane.add(valRuntimeFree, 2, 3);
+        pane.add(valRuntimeTotal, 2, 4);
 
-        pane.add(lblRuntimeMax, 0, 6);
-        pane.add(lblRuntimeFree, 0, 7);
-        pane.add(lblRuntimeTotal, 0, 8);
-
-        pane.add(descRuntimeMax, 1, 6);
-        pane.add(descRuntimeFree, 1, 7);
-        pane.add(descRuntimeTotal, 1, 8);
-
-        pane.add(valRuntimeMax, 2, 6);
-        pane.add(valRuntimeFree, 2, 7);
-        pane.add(valRuntimeTotal, 2, 8);
-
-        pane.add(btnUpdate, 0, 10);
+        pane.add(btnUpdate, 0, 6);
 
         pane.setAlignment(Pos.CENTER);
 
-        stage.setScene(new Scene(pane, 900, 375));
+        stage.setScene(new Scene(pane, 600, 300));
     }
 
     private void registerListener() {
-        btnUpdate.setOnAction(new EventHandler<ActionEvent>() {
-            @Override
-            public void handle(ActionEvent event) {
-                updateValues();
-            }
-        });
+        btnUpdate.setOnAction(event -> updateValues());
     }
 
     private void updateValues() {
-        this.valDirectAllocation.setText("" + buffer.capacity());
-        this.valNativeUsed.setText("" + sun.misc.SharedSecrets.getJavaNioAccess().getDirectBufferPool().getMemoryUsed());
-        this.valMaxMemory.setText("" + sun.misc.VM.maxDirectMemory());
-
         this.valRuntimeMax.setText("" + Runtime.getRuntime().maxMemory());
         this.valRuntimeFree.setText("" + Runtime.getRuntime().freeMemory());
         this.valRuntimeTotal.setText("" + Runtime.getRuntime().totalMemory());