feat: Java 抽象类，Java 多态

niumoo · niumoo · commit 014a6838f86c · 2023-04-18T14:04:26.000+08:00
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/abs/AbsPerson.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/abs/AbsPerson.java
@@ -0,0 +1,15 @@
+package com.wdbyte.oop.abs;
+
+/**
+ * @author niulang
+ * @date 2023/04/17
+ */
+public abstract class AbsPerson {
+    public int age = 22;
+
+    public void eat() {
+        System.out.println("吃饭");
+    }
+
+    public abstract void sleep();
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/abs/PersonTest.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/abs/PersonTest.java
@@ -0,0 +1,23 @@
+package com.wdbyte.oop.abs;
+
+/**
+ * @author niulang
+ * @date 2023/04/17
+ */
+public class PersonTest {
+    public static void main(String[] args) {
+        AbsPerson absPerson = new Student();
+        System.out.println(absPerson.age);
+        absPerson.eat();
+        absPerson.sleep();
+
+        Student student = new Student();
+        Teacher teacher = new Teacher();
+        sleep(student);
+        sleep(teacher);
+    }
+
+    public static void sleep(AbsPerson person) {
+        person.sleep();
+    }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/abs/Student.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/abs/Student.java
@@ -0,0 +1,13 @@
+package com.wdbyte.oop.abs;
+
+/**
+ * @author niulang
+ * @date 2023/04/17
+ */
+public class Student extends AbsPerson {
+
+    @Override
+    public void sleep() {
+        System.out.println("学生上课不能睡觉");
+    }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/abs/Teacher.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/abs/Teacher.java
@@ -0,0 +1,13 @@
+package com.wdbyte.oop.abs;
+
+/**
+ * @author niulang
+ * @date 2023/04/17
+ */
+public class Teacher extends AbsPerson {
+
+    @Override
+    public void sleep() {
+        System.out.println("老师教课时不能睡觉");
+    }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/interfac/JavaInterface.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/interfac/JavaInterface.java
@@ -1,4 +1,4 @@
-package com.wdbyte.oop;
+package com.wdbyte.oop.interfac;
 
 /**
  * @author niulang
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/interfac/JavaInterface2.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/interfac/JavaInterface2.java
@@ -1,4 +1,4 @@
-package com.wdbyte.oop;
+package com.wdbyte.oop.interfac;
 
 /**
  * @author niulang
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/interfac/JavaInterface3.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/interfac/JavaInterface3.java
@@ -1,4 +1,4 @@
-package com.wdbyte.oop;
+package com.wdbyte.oop.interfac;
 
 /**
  * @author niulang
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/AliyunOss.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/AliyunOss.java
@@ -0,0 +1,17 @@
+package com.wdbyte.oop.polymorphism;
+
+/**
+ * @author niulang
+ * @date 2023/04/18
+ */
+public class AliyunOss implements Oss {
+    @Override
+    public void upload(String content) {
+        try {
+            Thread.sleep(10);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+        System.out.println("文件已经上传到阿里云 OSS，内容：" + content);
+    }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/Animal.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/Animal.java
@@ -0,0 +1,17 @@
+package com.wdbyte.oop.polymorphism;
+
+import java.util.Arrays;
+
+public class Animal {
+    public void makeSound() {
+        System.out.println("动物发出叫声");
+    }
+
+    public static void main(String[] args) {
+        Animal cat = new Cat();
+        Animal dog = new Dog();
+        for (Animal animal : Arrays.asList(cat, dog)) {
+            animal.makeSound();
+        }
+    }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/Cat.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/Cat.java
@@ -0,0 +1,8 @@
+package com.wdbyte.oop.polymorphism;
+
+public class Cat extends Animal{
+  @Override
+  public void makeSound(){
+    System.out.println("喵喵喵");
+  }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/Dog.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/Dog.java
@@ -0,0 +1,8 @@
+package com.wdbyte.oop.polymorphism;
+
+public class Dog extends Animal{
+  @Override
+  public void makeSound(){
+    System.out.println("汪汪汪");
+  }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/Oss.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/Oss.java
@@ -0,0 +1,14 @@
+package com.wdbyte.oop.polymorphism;
+
+/**
+ * @author niulang
+ * @date 2023/04/18
+ */
+public interface Oss {
+
+    /**
+     * 文件上传
+     * @param content
+     */
+    void upload(String content);
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/OssUtil.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/OssUtil.java
@@ -0,0 +1,28 @@
+package com.wdbyte.oop.polymorphism;
+
+/**
+ * @author niulang
+ * @date 2023/04/18
+ */
+public class OssUtil {
+    /**
+     * OSS 上传工具类
+     *
+     * @param oss
+     * @param content
+     */
+    public static void upload(Oss oss, String content) {
+        long start = System.currentTimeMillis();
+        oss.upload(content);
+        long end = System.currentTimeMillis();
+        System.out.println("上传耗时:" + (end - start) + "ms");
+    }
+
+    public static void main(String[] args) {
+        AliyunOss aliyunOss = new AliyunOss();
+        TencentOss tencentOss = new TencentOss();
+        upload(aliyunOss, "Hello aliyun");
+        System.out.println("------------");
+        upload(tencentOss, "Hello tencent");
+    }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/TencentOss.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/TencentOss.java
@@ -0,0 +1,17 @@
+package com.wdbyte.oop.polymorphism;
+
+/**
+ * @author niulang
+ * @date 2023/04/18
+ */
+public class TencentOss implements Oss {
+    @Override
+    public void upload(String content) {
+        try {
+            Thread.sleep(100);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+        System.out.println("文件已经上传到腾讯云 OSS，内容：" + content);
+    }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/inter/Animal.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/inter/Animal.java
@@ -0,0 +1,7 @@
+package com.wdbyte.oop.polymorphism.inter;
+
+public interface Animal{
+  void makeSound();
+}
+
+
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/inter/Cat.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/inter/Cat.java
@@ -0,0 +1,8 @@
+package com.wdbyte.oop.polymorphism.inter;
+
+public class Cat implements Animal{
+  @Override
+  public void makeSound(){
+    System.out.println("喵喵喵");
+  }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/inter/Dog.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/inter/Dog.java
@@ -0,0 +1,8 @@
+package com.wdbyte.oop.polymorphism.inter;
+
+public class Dog implements Animal{
+  @Override
+  public void makeSound(){
+    System.out.println("汪汪汪");
+  }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/inter/Test.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/inter/Test.java
@@ -0,0 +1,23 @@
+package com.wdbyte.oop.polymorphism.inter;
+
+import java.util.Arrays;
+
+
+/**
+ * @author niulang
+ * @date 2023/04/18
+ */
+public class Test {
+    public static void main(String[] args) {
+        Animal cat = new Cat();
+        Animal dog = new Dog();
+        for (Animal animal : Arrays.asList(cat, dog)) {
+            animal.makeSound();
+        }
+    }
+
+    public static void makeSound(Animal animal){
+        animal.makeSound();
+    }
+}
+
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/inter/Test2.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/polymorphism/inter/Test2.java
@@ -0,0 +1,20 @@
+package com.wdbyte.oop.polymorphism.inter;
+
+
+/**
+ * @author niulang
+ * @date 2023/04/18
+ */
+public class Test2 {
+    public static void main(String[] args) {
+        Animal cat = new Cat();
+        Animal dog = new Dog();
+        makeSound(cat); // 喵喵喵
+        makeSound(dog); // 汪汪汪
+    }
+
+    public static void makeSound(Animal animal) {
+        animal.makeSound();
+    }
+}
+

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-package com.wdbyte.oop;`
	`1`	`+package com.wdbyte.oop.interfac;`
`2`	`2`
`3`	`3`	`/**`
`4`	`4`	`* @author niulang`