diff --git "a/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo01.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo01.java"
new file mode 100644
index 0000000000000000000000000000000000000000..6560ff522e8b26fe956c4d73959946fd187094f6
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo01.java"
@@ -0,0 +1,30 @@
+package com.md.Lessions08;
+
+import java.util.Scanner;
+
+public class Demo01 {
+
+	public static void main(String[] args) {
+		Scanner scan = new Scanner(System.in);
+		double sum = 0;
+		double price;
+	while(true) {
+		 System.out.println("请输入金额:");
+		 price =scan.nextDouble();
+		 if(price<=0&&price!=-1) {
+			 System.err.println("报错信息");
+			 continue;}
+			 
+		 if(price==-1) {
+			 
+			 break;
+		 }sum+=price;
+	
+	}System.err.println("sum"+sum);
+	System.out.println("end");
+			
+		
+	
+
+
+}}
\ 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/\345\210\230\346\200\235\347\233\210/Demo02.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo02.java"
new file mode 100644
index 0000000000000000000000000000000000000000..d472942b6e6087c05ae52eccadd097690232e04a
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo02.java"
@@ -0,0 +1,16 @@
+package com.md.Lessions08;
+
+public class Demo02 {
+
+	public static void main(String[] args) {
+		//猴子吃桃
+		int a =1;
+		
+ for (int i = 1; i < 10; i++) {
+	  a=(a+1)*2;
+	 System.out.println("第"+(10-i)+"天，桃子数是："+a);
+}
+ System.out.println("最终结果是："+a);
+	}
+
+}
diff --git "a/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo03.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo03.java"
new file mode 100644
index 0000000000000000000000000000000000000000..fa7630ffc4363a43715b3273579d323f0c700afd
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo03.java"
@@ -0,0 +1,22 @@
+package com.md.Lessions08;
+
+public class Demo03 {
+
+	public static void main(String[] args) {
+		// 水仙花
+		int a;
+		int b;
+		int c;
+		
+		for (int i = 100; i <=999; i++) {
+			a=i/100;
+			b=i/10;
+			b=b%10;
+			c=i%10;
+			if(a*a*a+b*b*b+c*c*c==i) {
+				System.out.println(i);
+			}
+		}
+	}
+
+}
diff --git "a/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo04.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo04.java"
new file mode 100644
index 0000000000000000000000000000000000000000..1cd63983bc630d1a8e544acf5572bf892e17323f
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo04.java"
@@ -0,0 +1,19 @@
+package com.md.Lessions08;
+
+public class Demo04 {
+
+	public static void main(String[] args) {
+	for (int i = 1; i <=9; i++) {
+		for (int j = 1; j < 9; j++) {
+	if(!(j>i)) {
+		System.out.print(i+"*"+j+"="+i*j+"\t");
+		
+	}
+			
+		}
+		System.out.println();
+	}
+	
+	}
+
+}
diff --git "a/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo05.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo05.java"
new file mode 100644
index 0000000000000000000000000000000000000000..5c54ebb03bad189a3629791c9ac1da54dc60e528
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo05.java"
@@ -0,0 +1,21 @@
+package com.md.Lessions08;
+
+import java.util.Scanner;
+
+public class Demo05 {
+
+	public static void main(String[] args) {
+		// 实心正方形
+		Scanner scan = new Scanner(System.in);
+		System.out.println("请输入正方形的边长");
+		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/\345\210\230\346\200\235\347\233\210/Demo06.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo06.java"
new file mode 100644
index 0000000000000000000000000000000000000000..fcae21ef7c87bd2e1eb1f6559c936620cfcb7764
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo06.java"
@@ -0,0 +1,28 @@
+package com.md.Lessions08;
+
+import java.util.Scanner;
+
+public class Demo06 {
+
+	public static void main(String[] args) {
+		//空心正方形
+		Scanner scan = new Scanner(System.in);
+		System.out.println("请输入正方形的边长");
+		int a = scan.nextInt();
+		for (int i = 0; i < a; i++) {
+		for (int j = 0; j < a; j++) {
+		if(j==0||j==a-1||i==0||i==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/\345\210\230\346\200\235\347\233\210/Demo07.java" "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo07.java"
new file mode 100644
index 0000000000000000000000000000000000000000..6f1d13fb9d38a005fb77ae49bd2a88dea19416e3
--- /dev/null
+++ "b/Java\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\345\210\230\346\200\235\347\233\210/Demo07.java"
@@ -0,0 +1,11 @@
+package com.md.Lessions08;
+
+public class Demo07 {
+
+	public static void main(String[] args) {
+		//开发部分员工年龄
+		int[] a= new int[5];
+		
+	}
+
+}