diff --git "a/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo1.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo1.java"
new file mode 100644
index 0000000000000000000000000000000000000000..55e85db10fbe0f333bee2ceb41954c11b110d9dc
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo1.java"
@@ -0,0 +1,12 @@
+package Lession1;
+
+public class Demo1 {
+	public static void main(String[] args) {
+		int a = 1;
+		for (int i = 1; i<10; i++) {
+				a=(a+1)*2;
+				System.out.println(a);
+		}
+	}
+
+}
diff --git "a/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo2.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo2.java"
new file mode 100644
index 0000000000000000000000000000000000000000..a1dd519b1a11dd84762a3074d24dca73c437a311
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo2.java"
@@ -0,0 +1,24 @@
+package Lession1;
+
+public class Demo2 {
+	
+
+	public static void main(String[] args) {
+		int a=0;
+		int b=0;
+		int c=0;
+		
+		
+		for (int i = 100; i <=999; i++) {
+			 a=i%10;
+			 b=i/10%10;
+			 c=i/100;
+			 if (a*a*a+b*b*b+c*c*c==i) {
+					System.out.println(i);
+		}
+		
+			
+		}
+	}
+
+}
\ No newline at end of file
diff --git "a/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo3.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo3.java"
new file mode 100644
index 0000000000000000000000000000000000000000..69d53d95628f2b2095df19e7ec8d4bb214886528
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo3.java"
@@ -0,0 +1,18 @@
+package Lession1;
+import java.util.Scanner;
+public class Demo3 {
+	public static void main(String[] args) {
+		Scanner scan = new Scanner(System.in);
+		
+		System.out.println("请输入一个数字");
+		int a = scan.nextInt();
+		
+		for (int i = 0; i < a; i++) {
+			for (int j = 0; j < a; j++) {
+				System.out.print("*");
+				
+			}
+			System.out.println();
+		}
+	}
+}
diff --git "a/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo4.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo4.java"
new file mode 100644
index 0000000000000000000000000000000000000000..844c0fbe76a67b2c9cda79403eeb9db5f7c78278
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo4.java"
@@ -0,0 +1,28 @@
+package Lession1;
+
+import java.util.Scanner;
+
+public class Demo4 {
+	public static void main(String[] args) {
+		Scanner scan = new Scanner(System.in);
+		
+		System.out.println("请输入一个数字");
+		int a = scan.nextInt();
+		
+		for (int i = 0; i < a; i++) {
+			for (int j = 0; j < a; j++) {
+				
+				if (i==0||i==a-1||j==0||j==a-1) {
+					System.out.print("*");
+					
+				} else {
+					System.out.print(" ");
+
+				}
+				
+			}
+			System.out.println();
+		}
+	}
+}
+
diff --git "a/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo5.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo5.java"
new file mode 100644
index 0000000000000000000000000000000000000000..1c3669344ca7b4cdc3d35b96c475871ca4ab9fc7
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo5.java"
@@ -0,0 +1,35 @@
+package Lession1;
+
+import java.util.Scanner;
+
+public class Demo5 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		int sum=0;
+		Scanner scanner=new Scanner(System.in);
+		int  []a=new int [5];
+		for(int i=0;i<5;i++) {
+			System.out.println("输入员工的年龄");
+		a[i]=scanner.nextInt();
+			
+        	sum+=a[i];		
+		}
+		int max=a[0];
+		int min=a[0];
+		for (int c=1;c<5;c++) {
+			if(max<a[c]) {
+				max=a[c];
+			}
+		}
+		for (int e=1;e<5;e++) {
+			if(min>a[e]) {
+				min=a[e];
+			}
+		}
+		System.out.println("平均年龄为："+sum/5);
+		System.out.println("年龄最大为："+max);
+		System.out.println("年龄最小为："+min);
+	}
+
+}
diff --git "a/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo6.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo6.java"
new file mode 100644
index 0000000000000000000000000000000000000000..fdcef762192e01c1719be44f25d252cd8ce36500
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\344\275\225\351\223\255\346\266\233/Demo6.java"
@@ -0,0 +1,36 @@
+package Lession1;
+
+import java.util.Scanner;
+
+public class Demo6 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		Scanner scan = new Scanner(System.in);
+		int a = 0;
+		int b;
+		for (int i = 0; i <4; i++) {
+			System.out.println("请输入金额");
+			b = scan.nextInt();
+			
+			
+			
+			if (b==-1) {
+				
+				break;
+				
+			}
+			if (b<=0) {
+				System.out.println("输入报错");
+				continue;
+				
+				
+			}
+			a=a+b;
+			
+		}
+		System.out.println("总金额是"+a);
+
+	}
+
+}
\ No newline at end of file