diff --git "a/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/wojiuyou.java" "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/wojiuyou.java"
new file mode 100644
index 0000000000000000000000000000000000000000..7f5711570ceaf72acd633c78ce9ac61c85011360
--- /dev/null
+++ "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/wojiuyou.java"
@@ -0,0 +1,16 @@
+
+package 练习;
+
+public class wojiuyou {
+
+	public static void main(String[] args) {
+		int a=10;
+		int b=20;
+		int c;
+		c=a;
+		a=b;
+		b=c;
+
+	}
+
+}
diff --git "a/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/\344\272\244\346\215\242.java" "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/\344\272\244\346\215\242.java"
new file mode 100644
index 0000000000000000000000000000000000000000..10a47de5f05440c5b75240d274c573254823c529
--- /dev/null
+++ "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/\344\272\244\346\215\242.java"
@@ -0,0 +1,36 @@
+package 练习;
+
+public class sdas {
+
+	public static void main(String[] args) {
+		 int[] arr = {19, 28, 37, 46, 50};
+	        // 打印反转前数组
+	        System.out.print("数组反转前：");
+	      for (int i = 0; i < arr.length; i++) {
+			System.out.print(arr[i]);
+			
+		}
+	        // 调用反转方法
+	        reserve(arr);
+	        // 打印反转后数组
+	        System.out.print("数组反转后：");
+	      for (int i = 0; i < arr.length; i++) {
+			System.out.print(arr[i]);
+			
+		}
+	    }
+	   
+	  
+	  
+	    public static int []  reserve(int [] arr){
+	        for(int i = 0,j = arr.length - 1;i < j;i++,j--){
+	            int temp = arr[j];
+	            arr[j] = arr[i];
+	            arr[i] = temp;
+	        }
+	        return arr;
+	    }
+
+	}
+
+
diff --git "a/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/\345\206\222\346\263\241.java" "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/\345\206\222\346\263\241.java"
new file mode 100644
index 0000000000000000000000000000000000000000..10463de3f298ca50ea3de99752094b4df17f96a4
--- /dev/null
+++ "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/\345\206\222\346\263\241.java"
@@ -0,0 +1,35 @@
+package 练习;
+
+public class dsf {
+
+	public static void main(String[] args) {
+int[] array = {35,62,80,70,91,40};
+		
+		System.out.println("排序之前：");
+		for (int i = 0; i < array.length; i++) {
+			System.out.print(array[i]+",");
+			
+		}
+		sortArray(array);
+		System.out.println("排序之后：");
+		for (int i = 0; i < array.length; i++) {
+			System.out.print(array[i]+",");
+			
+		}
+	}
+
+	public static int[] sortArray(int[] array) {
+		int num ;
+		for (int i = 0; i < array.length-1; i++) {
+			for (int j = 0; j < array.length-1-i; j++) {
+				if(array[j]<array[j+1]) {
+					num = array[j+1];
+					array[j+1]=array[j];
+					array[j] = num;
+				}
+			}
+		}
+		return array;
+	}
+
+}
\ No newline at end of file
diff --git "a/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/\351\232\217\346\234\272.java" "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/\351\232\217\346\234\272.java"
new file mode 100644
index 0000000000000000000000000000000000000000..aa15fac3a7f4432cfa9a65cd38f429bf4a9ebe61
--- /dev/null
+++ "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\347\216\213\351\200\270\351\243\236/\351\232\217\346\234\272.java"
@@ -0,0 +1,27 @@
+package 练习;
+
+import java.util.Scanner;
+
+public class zuoye1 {
+
+	public static void main(String[] args) {
+		int[] ary = new int[7];
+		for(int i=0; i<7; i++){
+			if (i==4) {
+			System.out.print(" ");	
+				
+			}
+			ary[i] = (int) (Math.random()*9);
+		System.out.print(ary[i]);
+		}
+		
+		}
+	
+		
+		
+		
+		
+		
+		
+	
+}