回答編集履歴

import忘れ

2025/10/09 21:58

投稿

TN8001

スコア10213

answer CHANGED Viewed

@@ -11,6 +11,7 @@
 ```xml:screen2.fxml
 <?xml version="1.0" encoding="UTF-8"?>
+<?import application.Shape1?>
 <?import javafx.scene.layout.AnchorPane?>
 <?import javafx.scene.shape.Rectangle?>
 <?import javafx.scene.text.Text?>
@@ -84,7 +85,7 @@
     }
 }
 ```
 ```xml:shape1.fxml
 <?xml version="1.0" encoding="UTF-8"?>
@@ -156,6 +157,7 @@
     }
 }
 ```
 ```java:Shape1.java
 package application;
@@ -177,13 +179,10 @@
         @Override public void handle(long timestamp) {
             var offset = shiftPressed.get() ? 5 : 2;
-            // ここは匿名クラスなのでthisはAnimationTimer
-            // Shape1を使いたい場合はShape1.this.の表記になる
-            // [java 匿名クラス this - Google 検索](https://www.google.com/search?q=java+%E5%8C%BF%E5%90%8D%E3%82%AF%E3%83%A9%E3%82%B9+this)
-            if (wPressed.get()) Shape1.this.setLayoutY(Shape1.this.getLayoutY() - offset);
+            if (wPressed.get()) setLayoutY(getLayoutY() - offset);
-            if (sPressed.get()) Shape1.this.setLayoutY(Shape1.this.getLayoutY() + offset);
+            if (sPressed.get()) setLayoutY(getLayoutY() + offset);
-            if (aPressed.get()) Shape1.this.setLayoutX(Shape1.this.getLayoutX() - offset);
+            if (aPressed.get()) setLayoutX(getLayoutX() - offset);
-            if (dPressed.get()) Shape1.this.setLayoutX(Shape1.this.getLayoutX() + offset);
+            if (dPressed.get()) setLayoutX(getLayoutX() + offset);
         }
     };
@@ -215,7 +214,7 @@
     }
 }
 ```
 ```java:HelloApplication.java
 package application;
@@ -227,9 +226,7 @@
 import java.io.IOException;
 public class HelloApplication extends Application {
-    public static void main(String[] args) {
+    public static void main(String[] args) { launch(); }
-        launch();
-    }
     @Override public void start(Stage stage) throws IOException {
         var fxmlLoader = new FXMLLoader(HelloApplication.class.getResource("screen2.fxml"));

不要な括弧

2025/10/09 14:36

投稿

TN8001

スコア10213

answer CHANGED Viewed

@@ -149,10 +149,10 @@
             }
         });
-        keyPressed.addListener(((_, aBoolean, _) -> {
+        keyPressed.addListener((_, aBoolean, _) -> {
             if (!aBoolean) timer.start();
             else timer.stop();
-        }));
+        });
     }
 }
 ```
@@ -208,10 +208,10 @@
             }
         });
-        keyPressed.addListener(((_, aBoolean, _) -> {
+        keyPressed.addListener((_, aBoolean, _) -> {
             if (!aBoolean) timer.start();
             else timer.stop();
-        }));
+        });
     }
 }
 ```

Shape1.java

2025/10/09 14:27

投稿

TN8001

スコア10213

answer CHANGED Viewed

@@ -18,7 +18,12 @@
             prefHeight="500.0" prefWidth="1000.0"
             xmlns:fx="http://javafx.com/fxml" fx:controller="application.Screen2Controller">
     <children>
-        <fx:include fx:id="shape1" source="shape1.fxml"/>
+        <!-- <fx:include fx:id="shape1" source="shape1.fxml"/> -->
+        <!-- ↑の代わりに継承クラスを使った場合 -->
+        <Shape1 fx:id="shape1" arcHeight="5.0" arcWidth="5.0" fill="#ff8c1f" height="100.0" layoutX="450.0"
+                layoutY="400.0"
+                focusTraversable="true" stroke="BLACK" strokeType="INSIDE" width="100.0"/>
         <Rectangle fx:id="boundary1" arcHeight="5.0" arcWidth="5.0" fill="TRANSPARENT" height="200.0" layoutX="400.0"
                    layoutY="150.0" stroke="BLACK" strokeType="INSIDE" width="200.0"/>
         <Text fx:id="text" layoutX="417.0" layoutY="63.0" text="何にも接触していません。"/>
@@ -151,7 +156,66 @@
     }
 }
 ```
+```java:Shape1.java
+package application;
+import javafx.animation.AnimationTimer;
+import javafx.beans.binding.BooleanBinding;
+import javafx.beans.property.BooleanProperty;
+import javafx.beans.property.SimpleBooleanProperty;
+import javafx.scene.shape.Rectangle;
+public class Shape1 extends Rectangle {
+    private final BooleanProperty wPressed = new SimpleBooleanProperty();
+    private final BooleanProperty aPressed = new SimpleBooleanProperty();
+    private final BooleanProperty sPressed = new SimpleBooleanProperty();
+    private final BooleanProperty dPressed = new SimpleBooleanProperty();
+    private final BooleanProperty shiftPressed = new SimpleBooleanProperty();
+    private final BooleanBinding keyPressed = wPressed.or(aPressed).or(sPressed).or(dPressed).or(shiftPressed);
+    private final AnimationTimer timer = new AnimationTimer() {
+        @Override public void handle(long timestamp) {
+            var offset = shiftPressed.get() ? 5 : 2;
+            // ここは匿名クラスなのでthisはAnimationTimer
+            // Shape1を使いたい場合はShape1.this.の表記になる
+            // [java 匿名クラス this - Google 検索](https://www.google.com/search?q=java+%E5%8C%BF%E5%90%8D%E3%82%AF%E3%83%A9%E3%82%B9+this)
+            if (wPressed.get()) Shape1.this.setLayoutY(Shape1.this.getLayoutY() - offset);
+            if (sPressed.get()) Shape1.this.setLayoutY(Shape1.this.getLayoutY() + offset);
+            if (aPressed.get()) Shape1.this.setLayoutX(Shape1.this.getLayoutX() - offset);
+            if (dPressed.get()) Shape1.this.setLayoutX(Shape1.this.getLayoutX() + offset);
+        }
+    };
+    public Shape1() {
+        setOnKeyPressed(e -> {
+            switch (e.getCode()) {
+                case W -> wPressed.set(true);
+                case A -> aPressed.set(true);
+                case S -> sPressed.set(true);
+                case D -> dPressed.set(true);
+                case SHIFT -> shiftPressed.set(true);
+            }
+        });
+        setOnKeyReleased(e -> {
+            switch (e.getCode()) {
+                case W -> wPressed.set(false);
+                case A -> aPressed.set(false);
+                case S -> sPressed.set(false);
+                case D -> dPressed.set(false);
+                case SHIFT -> shiftPressed.set(false);
+            }
+        });
+        keyPressed.addListener(((_, aBoolean, _) -> {
+            if (!aBoolean) timer.start();
+            else timer.stop();
+        }));
+    }
+}
+```
 ```java:HelloApplication.java
 package application;