泛型方法返回三个可比较对象的最大值

CPU-Code · CPU-Code · commit 5d74f84bfa2d · 2021-12-20T14:53:10.000+08:00
diff --git a/generics/README.md b/generics/README.md
@@ -15,6 +15,8 @@
 - [x] [Generic6__泛型通配符](src/main/java/com/cpucode/generics/Generic6.java)
 - [x] [Generic7__受限泛型](src/main/java/com/cpucode/generics/Generic7.java)
 - [x] [泛型方法打印不同类型的数组元素](src/main/java/com/cpucode/generics/methodTest/GenericMethodTest.java)
+- [x] [泛型方法返回三个可比较对象的最大值](src/main/java/com/cpucode/generics/maximum/MaximumTest.java)
+
 
 - [返回目录](#文件目录)
 
diff --git a/generics/src/main/java/com/cpucode/generics/maximum/MaximumTest.java b/generics/src/main/java/com/cpucode/generics/maximum/MaximumTest.java
@@ -0,0 +1,52 @@
+package com.cpucode.generics.maximum;
+
+/**
+ * 泛型方法返回三个可比较对象的最大值
+ * T - Type（Java 类）
+ *
+ * @author : cpucode
+ * @date : 2021/12/20 14:44
+ * @github : https://github.com/CPU-Code
+ * @csdn : https://blog.csdn.net/qq_44226094
+ */
+public class MaximumTest {
+    public static void main(String[] args) {
+        Integer x = 3;
+        Integer y = 4;
+        Integer z = 5;
+
+        System.out.printf( "%d, %d 和 %d 中最大的数为 %d\n\n",
+                x, y, z, maximum(x, y, z));
+
+        Double doubleX = 6.6;
+        Double doubleY = 8.8;
+        Double doubleZ = 9.9;
+
+        System.out.printf( "%.1f, %.1f 和 %.1f 中最大的数为 %.1f\n\n",
+                doubleX, doubleY, doubleZ, maximum(doubleX, doubleY, doubleZ));
+
+        String stringX = "cpu";
+        String stringY = "code";
+        String stringZ = "cpuCode";
+
+        System.out.printf( "%s, %s 和 %s 中最大的数为 %s\n","pear",
+                stringX, stringY , stringZ, maximum(stringX, stringY, stringZ));
+    }
+
+    public static <T extends Comparable<T>> T maximum(T x, T y, T z) {
+        // 假设x是初始最大值
+        T max = x;
+
+        if (y.compareTo(max) > 0) {
+            //y 更大
+            max = y;
+        }
+        if (z.compareTo(max) > 0) {
+            // 现在 z 更大
+            max = z;
+        }
+
+        // 返回最大对象
+        return max;
+    }
+}
