diff --git "a/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom01.java" "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom01.java"
new file mode 100644
index 0000000000000000000000000000000000000000..c51d14f6d795dd42cf33f8a24dcebbf2cf481a6d
--- /dev/null
+++ "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom01.java"
@@ -0,0 +1,48 @@
+package lesson;
+
+import java.util.Scanner;
+
+public class Deom01 {
+
+	public static void main(String[] args) {
+		Scanner scan = new Scanner(System.in);
+		System.out.println("请选择要计算的方法");
+		String a =scan.next();
+		System.out.println("请输入第一个数");
+		int c =scan.nextInt();
+		System.out.println("请输入第二个数");
+		int b =scan.nextInt();
+		switch (a) {
+		case "+":
+			System.out.println("返回的和是："+jia(c,b));
+			break;
+		case "-":
+			System.out.println("返回的差是："+jian(c,b));
+			break;
+		case "*":
+			System.out.println("返回的积是："+cheng(c,b));
+			break;
+		case "/":
+			System.out.println("返回的商是："+chu(c,b));
+			break;
+		default:
+			System.out.println("功能不足，没有这运算方法。");
+			break;
+		}
+	}
+
+	public static int jia(int c,int b) {
+		return c+b;
+		}
+	public static int jian(int c,int b) {
+		return c-b;
+		}
+	public static int cheng(int c,int b) {
+		return c*b;
+		}
+	public static int chu(int c,int b) {
+		return c/b;
+		}
+	}
+
+
diff --git "a/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom02.java" "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom02.java"
new file mode 100644
index 0000000000000000000000000000000000000000..4fba00d8b0e49a652fd4bc881cf664c209b5344c
--- /dev/null
+++ "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom02.java"
@@ -0,0 +1,21 @@
+package lesson;
+
+public class Deom02 {
+
+	public static void main(String[] args) {
+		int [] nummax = {1,2,3,4,5};
+		
+		int result = bigger(nummax);
+		
+	}
+	public static int bigger(int[] nummax) {
+		int max =nummax[0];
+		for (int i = 1; i < nummax.length; i++) {
+			if(nummax[i]>max) {
+				max = nummax[i];
+			}
+		}
+		return max;
+	}
+	
+}
diff --git "a/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom03.java" "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom03.java"
new file mode 100644
index 0000000000000000000000000000000000000000..f52c09db7d799f359055ddea3f8f38ac810c82cd
--- /dev/null
+++ "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom03.java"
@@ -0,0 +1,61 @@
+package lesson;
+
+import java.util.Scanner;
+
+public class Deom03 {
+
+	public static void main(String[] args) {
+		Scanner scan = new Scanner(System.in);
+		System.out.println("请选择要计算的图像的面积");
+		System.out.println("1.长方形的面积");
+		System.out.println("2.正方形的面积");
+		System.out.println("3.三角形的面积");
+		System.out.println("4.圆形的面积");
+		int a =scan.nextInt();
+		switch (a) {
+		case 1:	
+			System.out.println("请输入长");
+			int c =scan.nextInt();
+			System.out.println("请输入宽");
+			int b =scan.nextInt();
+			System.out.println("返回的长方形面积是："+cfx(c,b));
+			break;
+		case 2:
+			System.out.println("请输入边长");
+			int d =scan.nextInt();
+			System.out.println("返回的正方形面积是："+zfx(d));
+			break;
+		case 3:
+			System.out.println("请输入底");
+			int e =scan.nextInt();
+			System.out.println("请输入高");
+			int f =scan.nextInt();
+			System.out.println("返回的三角形面积是："+sjx(e,f));
+			break;
+		case 4:
+			System.out.println("请输入半径");
+			double g =scan.nextDouble();
+			System.out.println("返回的圆形面积是："+yx(g));
+			break;
+		default:
+			System.out.println("功能不足，没有。");
+			break;
+		}
+	}
+
+	public static int cfx(int c,int b) {
+		return c*b;
+		}
+	public static int zfx(int d) {
+		return d*d;
+		}
+	public static int sjx(int e,int f) {
+		return e*f/2;
+		}
+	public static double yx(double g) {
+		return g*g*3.14;
+		}
+
+
+	}
+
diff --git "a/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom04.java" "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom04.java"
new file mode 100644
index 0000000000000000000000000000000000000000..4bef44996e383baf0cd03a89e9accb84641c243b
--- /dev/null
+++ "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom04.java"
@@ -0,0 +1,20 @@
+package lesson;
+
+import java.util.Scanner;
+
+public class Deom04 {
+
+	public static void main(String[] args) {
+		int a = 0;
+		Scanner scan = new Scanner(System.in);
+		System.out.println("请输入高");
+		a = scan.nextInt();
+		for (int i = 1; i <= a; i++) {
+			for (int j = 1; j <= 2*i-1; j++) {
+				System.out.print("*");
+			}
+			System.out.println("");
+		}
+	}
+
+}
diff --git "a/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom05.java" "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom05.java"
new file mode 100644
index 0000000000000000000000000000000000000000..209e578982200c76a37b0022f1af63221932773c
--- /dev/null
+++ "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom05.java"
@@ -0,0 +1,23 @@
+package lesson;
+
+import java.util.Scanner;
+
+public class Deom05 {
+
+		public static void main(String[] args) {
+		int a = 0;
+		Scanner scan = new Scanner(System.in);
+		System.out.println("请输入高");
+		a = scan.nextInt();
+		for(int i=0;i<a;i++){
+			for(int k=1;k<i;k++){
+			System.out.print("");
+			}
+			for(int j=10;j>2*i+1;j--){
+			System.out.print("*");
+			}
+			System.out.println();
+		}
+	}
+}
+
diff --git "a/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom06.java" "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom06.java"
new file mode 100644
index 0000000000000000000000000000000000000000..51c0c34bfd403cb987d75c1b9f4dd3995b5b6a79
--- /dev/null
+++ "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\346\234\261\345\245\207\344\274\237/Deom06.java"
@@ -0,0 +1,27 @@
+package lesson;
+
+import java.util.Scanner;
+
+public class Deom06 {
+
+	public static void main(String[] args) {
+		System.out.println("输入n");
+		Scanner in=new Scanner(System.in);
+		int n=in.nextInt();
+		while(n<1)
+		{
+		System.out.println("请输入大于0的数字:");
+		n=in.nextInt();
+		}
+		int sum=0;
+		for(int i=1;i<=n;++i)
+		sum+=recursion(i);
+		System.out.println(sum);  }
+		public static int recursion(int n){
+		if(n==1)
+		return 1;
+		else 
+		return n*recursion(n-1);  
+		}
+	}
+