From 943af86cf288eb17fa4ead5a3797953155ad267b Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Mon, 3 Aug 2026 14:46:53 +0800
Subject: [PATCH] =?UTF-8?q?s-day04-Arrays=E5=B7=A5=E5=85=B7=E7=B1=BB?=
 =?UTF-8?q?=E7=9A=84=E6=8E=92=E5=BA=8F=E5=8A=9F=E8=83=BD=E4=BB=8B=E7=BB=8D?=
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---
 .../src/com/inmind/arrays06/ArraysDemo13.java | 26 +++++++++++++++++++
 s-day04/src/com/inmind/sort05/SortDemo12.java |  6 ++---
 2 files changed, 29 insertions(+), 3 deletions(-)
 create mode 100644 s-day04/src/com/inmind/arrays06/ArraysDemo13.java

diff --git a/s-day04/src/com/inmind/arrays06/ArraysDemo13.java b/s-day04/src/com/inmind/arrays06/ArraysDemo13.java
new file mode 100644
index 0000000..234b0b0
--- /dev/null
+++ b/s-day04/src/com/inmind/arrays06/ArraysDemo13.java
@@ -0,0 +1,26 @@
+package com.inmind.arrays06;
+
+import java.util.Arrays;
+import java.util.Comparator;
+
+/*
+    Arrays
+    public static String toString(int[] a) ：返回指定数组内容的字符串表示形式。
+    public static void sort(int[] a) ：对指定的 int 型数组按数字升序进行排序。
+    static <T> void sort(T[] a, Comparator<? super T> c) 根据指定的比较器引发的顺序对指定的对象数组进行排序。
+ */
+public class ArraysDemo13 {
+    public static void main(String[] args) {
+        Integer[] arr = {1, 5, 3, 9, 2, 4, 7, 6, 8};
+        System.out.println(Arrays.toString(arr));
+        Arrays.sort(arr);
+        System.out.println(Arrays.toString(arr));
+        Arrays.sort(arr, new Comparator<Integer>() {
+            @Override
+            public int compare(Integer o1, Integer o2) {
+                return o2-o1;
+            }
+        });
+        System.out.println(Arrays.toString(arr));
+    }
+}
diff --git a/s-day04/src/com/inmind/sort05/SortDemo12.java b/s-day04/src/com/inmind/sort05/SortDemo12.java
index 1df2bbf..8d24481 100644
--- a/s-day04/src/com/inmind/sort05/SortDemo12.java
+++ b/s-day04/src/com/inmind/sort05/SortDemo12.java
@@ -51,11 +51,11 @@ public class SortDemo12 {
                 new Student("小王3", 17),
                 new Student("小王4", 18),
                 new Student("小王5", 16));
-
+        System.out.println(list);
         sortList(list, new Comparator<Student>() {
             @Override
             public int compare(Student o1, Student o2) {
-                return o2.age - o1.age;
+                return o1.age - o2.age;
             }
         });
         System.out.println(list);
@@ -88,7 +88,7 @@ public class SortDemo12 {
                     //交换
                     T temp = arr.get(j);
                     arr.set(j, arr.get(j+1));
-                    arr.set(j = 1, temp);
+                    arr.set(j + 1, temp);
                 }
             }
         }