w5

.idea/.name

@@ -0,0 +1 @@
+Vehicle.java

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

.idea/workspace.xml

@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ChangeListManager">
+    <list default="true" id="8e3e51eb-8beb-4b33-b423-c0d05e3bc0cd" name="Changes" comment="">
+      <change afterPath="$PROJECT_DIR$/w5/VehicleTest.java" afterDir="false" />
+    </list>
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
+  </component>
+  <component name="ProjectColorInfo">{
+  &quot;associatedIndex&quot;: 5
+}</component>
+  <component name="ProjectId" id="3Bkoq0Kwl66wS2xPmDc9y2mPKXI" />
+  <component name="ProjectViewState">
+    <option name="hideEmptyMiddlePackages" value="true" />
+    <option name="showLibraryContents" value="true" />
+  </component>
+  <component name="PropertiesComponent">{
+  &quot;keyToString&quot;: {
+    &quot;ModuleVcsDetector.initialDetectionPerformed&quot;: &quot;true&quot;,
+    &quot;RunOnceActivity.ShowReadmeOnStart&quot;: &quot;true&quot;,
+    &quot;RunOnceActivity.TerminalTabsStorage.copyFrom.TerminalArrangementManager.252&quot;: &quot;true&quot;,
+    &quot;RunOnceActivity.git.unshallow&quot;: &quot;true&quot;,
+    &quot;RunOnceActivity.typescript.service.memoryLimit.init&quot;: &quot;true&quot;,
+    &quot;git-widget-placeholder&quot;: &quot;main&quot;,
+    &quot;kotlin-language-version-configured&quot;: &quot;true&quot;,
+    &quot;last_opened_file_path&quot;: &quot;D:/java/untitled2/java&quot;,
+    &quot;settings.editor.selected.configurable&quot;: &quot;preferences.language.and.region&quot;,
+    &quot;vue.rearranger.settings.migration&quot;: &quot;true&quot;
+  }
+}</component>
+  <component name="SharedIndexes">
+    <attachedChunks>
+      <set>
+        <option value="bundled-jdk-30f59d01ecdd-2fc7cc6b9a17-intellij.indexing.shared.core-IU-253.31033.145" />
+        <option value="bundled-js-predefined-d6986cc7102b-9b0f141eb926-JavaScript-IU-253.31033.145" />
+      </set>
+    </attachedChunks>
+  </component>
+  <component name="TaskManager">
+    <task active="true" id="Default" summary="Default task">
+      <changelist id="8e3e51eb-8beb-4b33-b423-c0d05e3bc0cd" name="Changes" comment="" />
+      <created>1775042616030</created>
+      <option name="number" value="Default" />
+      <option name="presentableId" value="Default" />
+      <updated>1775042616030</updated>
+      <workItem from="1775042617092" duration="882000" />
+      <workItem from="1775104128296" duration="4129000" />
+      <workItem from="1775653218714" duration="2004000" />
+    </task>
+    <servers />
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="3" />
+  </component>
+</project>

w5/VehicleTest.java

@@ -0,0 +1,29 @@
+abstract class Vehicle {
+    public abstract void  run();
+}
+class Car extends Vehicle {
+    @Override
+    public void run() {
+        System.out.println("汽车在公路上行驶");
+    }
+}
+class Bike extends Vehicle {
+    @Override
+    public void run() {
+        System.out.println("自行车在非机动车道行驶");
+    }
+}
+class Truck extends Vehicle {
+    @Override
+    public void run() {
+        System.out.println("卡车在货运道路行驶");
+    }
+}
+public class VehicleTest {
+    public static  void main (String[] args) {
+        Vehicle[] vehicles = {new Car(),new Bike(),new Truck()};
+        for (Vehicle v : vehicles) {
+            v.run();
+        }
+    }
+}