backup

2/Lenj/Quadratzahlen.~ava

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+import javafx.application.Application;
+import javafx.scene.Scene;
+import javafx.scene.layout.Pane;
+import javafx.stage.Stage;
+import javafx.scene.control.*;
+import javafx.event.*;
+import javafx.scene.text.*;
+import javafx.scene.text.Font;
+import javafx.collections.*;
+
+/**
+ *
+ * Beschreibung
+ *
+ * @version 1.0 vom 19.11.2024
+ * @author 
+ */
+
+public class Quadratzahlen extends Application {
+  // Anfang Attribute
+  private Button bStart = new Button();
+  private ListView<String> listView1 = new ListView<>();
+  private ObservableList<String> listView1ObservableList = 
+            FXCollections.observableArrayList();
+  // Ende Attribute
+  
+  public void start(Stage primaryStage) { 
+    Pane root = new Pane();
+    Scene scene = new Scene(root, 198, 448);
+    // Anfang Komponenten
+    
+    bStart.setLayoutX(32);
+    bStart.setLayoutY(32);
+    bStart.setPrefHeight(24);
+    bStart.setPrefWidth(80);
+    bStart.setText("Start");
+    bStart.setOnAction(
+    (event) -> {bStart_Action(event);} 
+    );
+    bStart.setFont(Font.font("Dialog", 11));
+    root.getChildren().add(bStart);
+    listView1.setLayoutX(16);
+    listView1.setLayoutY(80);
+    listView1.setPrefHeight(360);
+    listView1.setPrefWidth(128);
+    listView1.setItems(listView1ObservableList);
+    
+    root.getChildren().add(listView1);
+    // Ende Komponenten
+    
+    primaryStage.setOnCloseRequest(e -> System.exit(0));
+    primaryStage.setTitle("Quadratzahlen");
+    primaryStage.setScene(scene);
+    primaryStage.show();
+  } // end of public Quadratzahlen
+  
+  // Anfang Methoden
+  
+  public static void main(String[] args) {
+    launch(args);
+  } // end of main
+  
+  public void bStart_Action(Event evt) {
+    listView1ObservableList.remove(0,20);
+    for (int i = 1; i < 21; i++) {
+      listView1ObservableList.add(i+". " + i*i); 
+    }
+    
+  } // end of bStart_Action
+
+  // Ende Methoden
+} // end of class Quadratzahlen