feat(class14): 提交了自己写的一坨屎山，塞了一堆语法糖....

糖很好吃捏🤗

- 新增 ArrayDemo5 类，演示二维数组的定义和遍历
- 新增 ArrayTest6 类，实现二维数组的初始化、打印和随机打乱功能

src/class14/ArrayDemo5.java

@@ -0,0 +1,21 @@
+package class14;
+
+public class ArrayDemo5 {
+    public static void main(String[] args) {
+        printArray();
+    }
+    public static void printArray(){
+        String[][] classroom={
+                {"张无极","张三","张三"},
+                {"张无极","张三","张三"},
+                {"张无极","张三","张三"}
+        };
+        for(String[] row:classroom){
+            for(String name:row){
+                System.out.println(name);
+            }
+        }
+        int [][] arr= new int[5][5];
+        System.out.println(arr.length);
+    }
+}

src/class14/ArrayTest6.java

@@ -0,0 +1,40 @@
+package class14;
+
+public class ArrayTest6 {
+    public static void main(String[] args) {
+        start(5);
+
+    }
+    public static void start(int n){
+        int [][] arr= new int[n][n];
+        int count = 0;
+        for(int i=0; i< arr.length; i++){
+            for(int j=0; j< arr.length; j++){
+                arr[i][j]=count++;
+            }
+        }
+        printArray(arr);
+        System.out.println("=================");
+        printArray(shuffle(arr));
+    }
+    public static void printArray(int[][] arr){
+        for(int[] row: arr){
+            for(int data: row){
+                System.out.print(data+" ");
+            }
+            System.out.println();
+        }
+    }
+    //二维数组打乱方法
+    public static int[][] shuffle(int[][] arr){
+        for(int i=0; i< arr.length; i++){
+            for(int j=0; j< arr.length; j++){
+                double[] index = {Math.random() * arr.length, Math.random() * arr.length};
+                int temp = arr[i][j];
+                arr[i][j] = arr[(int)index[0]][(int)index[1]];
+                arr[(int)index[0]][(int)index[1]] = temp;
+            }
+        }
+        return arr;
+    }
+}