From d5784f5337e7d12eea2f6e282e847ed460fbab9d Mon Sep 17 00:00:00 2001
From: bunny <1319900154@qq.com>
Date: Wed, 31 Jul 2024 09:23:40 +0800
Subject: [PATCH] =?UTF-8?q?:rocket:=20feat(=E6=96=B0=E5=A2=9E):=20Stream?=
 =?UTF-8?q?=E7=9A=84=E4=BD=BF=E7=94=A8?=
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---
 .../test/java/cn/bunny/stream/StreamTest.java | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/service/src/test/java/cn/bunny/stream/StreamTest.java b/service/src/test/java/cn/bunny/stream/StreamTest.java
index a090ec6..a4ded95 100644
--- a/service/src/test/java/cn/bunny/stream/StreamTest.java
+++ b/service/src/test/java/cn/bunny/stream/StreamTest.java
@@ -8,6 +8,7 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Optional;
 import java.util.stream.Stream;
 
 public class StreamTest {
@@ -158,4 +159,55 @@ public class StreamTest {
         }); // 迭代所有元素
         stream.close(); // 在所有操作完成后关闭流
     }
+
+    // 这两个方法用于获取流中的最大值和最小值。它们通常用于包含可比较元素的流。
+    @Test
+    void minAndMaxTest() {
+        Stream<Integer> numbers = Stream.of(1, 2, 3, 4, 5);
+
+        // 获取流中的最大值
+        Integer max = numbers.max(Integer::compareTo).orElse(0);
+        System.out.println("Max value: " + max);
+
+        // 最小值
+        Stream<Integer> numbers2 = Stream.of(1, 2, 3, 4, 5);
+        Integer min = numbers2.min(Integer::compareTo).orElse(0);
+        System.out.println("Min value: " + min);
+    }
+
+    // 这两个方法用于从流中获取元素。findFirst 返回流中的第一个元素，而 findAny 返回流中的任意一个元素（在并行流中更有用）。
+    @Test
+    void findTest() {
+        Stream<String> strings = Stream.of("apple", "banana", "cherry");
+
+        // 找到第一个元素
+        Optional<String> firstElement = strings.findFirst();
+        System.out.println("First element: " + firstElement.orElse("No element found"));
+
+        // 找到任意一个元素
+        Stream<String> strings2 = Stream.of("apple", "banana", "cherry");
+        Optional<String> anyElement = strings2.findAny();
+        System.out.println("Any element: " + anyElement.orElse("No element found"));
+    }
+
+    // anyMatch：判断流中是否至少有一个元素满足条件。
+    // allMatch：判断流中的所有元素是否都满足条件。
+    // noneMatch：判断流中是否所有元素都不满足条件。
+    @Test
+    void matchTest() {
+        // 检查是否有元素大于3
+        Stream<Integer> numbers = Stream.of(1, 2, 3, 4, 5);
+        boolean anyGreaterThanThree = numbers.anyMatch(num -> num > 3);
+        System.out.println("Any number greater than 3: " + anyGreaterThanThree);
+
+        // 检查是否所有元素都小于10
+        Stream<Integer> numbers2 = Stream.of(1, 2, 3, 4, 5);
+        boolean allLessThanTen = numbers2.allMatch(num -> num < 10);
+        System.out.println("All numbers less than 10: " + allLessThanTen);
+
+        // 检查是否所有元素都不等于0
+        Stream<Integer> numbers3 = Stream.of(1, 2, 3, 4, 5);
+        boolean noneEqualToZero = numbers3.noneMatch(num -> num == 0);
+        System.out.println("No numbers equal to zero: " + noneEqualToZero);
+    }
 }