diff --git "a/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom01.java" "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom01.java"
new file mode 100644
index 0000000000000000000000000000000000000000..c3a80f09aa8c115ccfce8817a6a0a7012fa0ada5
--- /dev/null
+++ "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom01.java"
@@ -0,0 +1,34 @@
+import java.util.Scanner;
+
+public class Deom01 {
+	public static void main(String[]args) {
+		Scanner scan=new Scanner (System.in);
+		int []a=new int [] {90,80,60,50,40,30,20,10,0};
+		System.out.print(a.length);
+		System.out.println("ÇëÊäÈëÒ»¸öÊý£º");
+		int s=scan.nextInt();
+		int index=0;
+		
+		for (int i = 8; i > 0; i--) {
+			if(a[i]>s) {
+				index=i+1;
+				break;
+			}
+			
+		}
+		System.out.println(index);
+		for (int i = 8; i >index; i--) {
+			a[i]=a[i-1];
+			
+		}
+		a[index]=s;
+		for (int i = 0; i < a.length; i++) {
+			System.out.print("|");
+			System.out.print(a[i]);
+			
+		}
+		
+		
+	}
+
+}
diff --git "a/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom02.java" "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom02.java"
new file mode 100644
index 0000000000000000000000000000000000000000..6bc4262c60a868b506b47734ac99312d75aee4a8
--- /dev/null
+++ "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom02.java"
@@ -0,0 +1,12 @@
+
+public class Deom02 {
+	public static void main(String[]args) {
+		int a=10, b=20,c;
+		c=a;
+		a=b;
+		b=c;
+		System.out.print(a+" ");
+		System.out.print(b);
+		
+	}
+}
diff --git "a/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom03.java" "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom03.java"
new file mode 100644
index 0000000000000000000000000000000000000000..cb4a55b0a09988fe40389b337b1121a3e41500bc
--- /dev/null
+++ "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom03.java"
@@ -0,0 +1,18 @@
+
+public class Deom03 {
+	public static void main(String[]args) {
+		int []arr= {19,28,37,46,50,};
+		jiaohuang(arr);
+		
+			
+		}
+	
+	public static int [] jiaohuang(int []a) {
+		for (int i = a.length-1; i >=0; i--) {
+			System.out.print("|");
+			System.out.print(a[i]);
+		
+		}
+		return a;
+	}
+}
diff --git "a/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom04.java" "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom04.java"
new file mode 100644
index 0000000000000000000000000000000000000000..9dba2e57a33386fbe8e3888376bd42de5b25bf04
--- /dev/null
+++ "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom04.java"
@@ -0,0 +1,25 @@
+
+public class Deom04 {
+	public static void main(String[]args) {
+		int []arr= {19,40,37,20,50,};
+		paixun(arr);
+	}
+	public static void paixun(int a[]) {
+		for (int i = 0; i < a.length; i++) {
+			for (int j = 0; j < a.length-i-1; j++) {
+				if(a[j]<a[j+1]) {
+					int sum=a[j+1];
+						a[j+1]=a[j];
+						a[j]=sum;
+				}
+				
+			}
+		}
+		for (int i = 0; i < a.length; i++) {
+			System.out.print("|");
+			System.out.print(a[i]);
+		}
+		
+	}
+
+}
diff --git "a/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom05.java" "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom05.java"
new file mode 100644
index 0000000000000000000000000000000000000000..06b85edd6326f7eaab41c5186cbc58fa34f9efdc
--- /dev/null
+++ "b/\346\226\271\346\263\225\345\244\215\344\271\2402/\345\217\266\351\242\200/Deom05.java"
@@ -0,0 +1,20 @@
+import java.util.Random;
+public class Deom05 {
+	public static void main(String[] args) {
+		Random rand=new Random();
+		int []a=new int [7];
+		for(int i=0; i<7;i++) {
+			a[i]=rand.nextInt(9);
+		}
+		for (int i = 0; i < a.length; i++) {
+			if (i==4) {
+				System.out.print(" "+" ");
+				System.out.print(a[i]);
+				
+			}else {
+				System.out.print(a[i]);
+			}
+		}
+	}
+
+}