diff --git "a/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a1.java" "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a1.java"
new file mode 100644
index 0000000000000000000000000000000000000000..4ff8e8ee67a75923f3cb2ccfdc61defea66d959b
--- /dev/null
+++ "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a1.java"
@@ -0,0 +1,29 @@
+import java.util.Scanner;
+
+public class a1 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		Scanner scan=new Scanner(System.in);
+ 
+   System.out.println("请输入边长");
+   int n=scan.nextInt();
+
+   for(int i=n-1;i>0;i--){
+	   for(int j=1;j<=n-i;j++){
+	   System.out.print(" ");
+	   }
+	   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/\351\273\204\345\277\240\347\243\212/a2.java" "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a2.java"
new file mode 100644
index 0000000000000000000000000000000000000000..30fbaf9ffb532e0c6f478c45c6df540c1a0de865
--- /dev/null
+++ "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a2.java"
@@ -0,0 +1,61 @@
+import java.util.Scanner;
+
+public class a2 {
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		Scanner scan=new Scanner(System.in);
+System.out.println("长方形面积1");
+System.out.println("正方形面积2");
+System.out.println("三角形面积3");
+System.out.println("圆形面积4");
+String hello=scan.next();
+switch (hello) {
+case "1":
+	System.out.println("请输入第一个数");
+	int a1=scan.nextInt();
+	System.out.println("请输入第一个数");
+	int a2=scan.nextInt();
+	System.out.println("结果"+k(a1,a2));
+	break;
+    case "2":
+	System.out.println("请输入第一个数");
+	int a=scan.nextInt();
+	System.out.println("结果"+k1(a));
+	break;
+	case "3":
+		System.out.println("请输入第一个数");
+		int a5=scan.nextInt();
+		System.out.println("请输入第一个数");
+		int a6=scan.nextInt();
+		System.out.println("结果"+k2(a5,a6));
+		break;
+		case "4":
+			System.out.println("请输入第一个数");
+			int a7=scan.nextInt();
+			System.out.println("请输入第一个数");
+			int a8=scan.nextInt();
+			System.out.println("结果"+k3(a7,a8));
+			break;
+default:
+	break;
+}		
+	}
+public static int k(int a1,int a2)  {
+	int c=a1*a2;
+	return c;
+}
+public static int k1(int a)  {
+	int c=a*a;
+	return c;
+}
+public static int k2(int a1,int b1)  {
+	int c=a1*b1/2;
+	return c;
+}public static double k3(double a7,double b8)  {
+	double π=3.14;
+	double c=a7*π;
+	return c;
+}
+	
+
+}
diff --git "a/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a3.java" "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a3.java"
new file mode 100644
index 0000000000000000000000000000000000000000..032fe3530b06e34699863c7fcd7124ee335cdc0a
--- /dev/null
+++ "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a3.java"
@@ -0,0 +1,23 @@
+import java.util.Scanner;
+
+public class a3 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		Scanner scan=new Scanner(System.in);
+		 
+		System.out.println("请输入边长");
+		   int a=scan.nextInt();
+		for(int i=1;i<=a;i++){
+
+			for(int j=1;j<=a-i;j++){
+			System.out.print(" ");
+			}
+			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/\351\273\204\345\277\240\347\243\212/a4.java" "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a4.java"
new file mode 100644
index 0000000000000000000000000000000000000000..0eac2fe3b03190d63d3359948da5c98c18a9b480
--- /dev/null
+++ "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a4.java"
@@ -0,0 +1,28 @@
+import java.util.Scanner;
+
+public class a4 {
+
+	public static void main(String[] args)  
+	{ 
+	System.out.println("输入n,打印1!+2!+3!+...+n!的值"); 
+	Scanner in=new Scanner(System.in); 
+	int n=in.nextInt(); 
+	while(n<1)//保证输入的数字大于0 
+	{ 
+	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);  } 
+	//递归函数,求n! 
+	public static int recursion(int n){ 
+	if(n==1) 
+	return 1; 
+	else  
+	return n*recursion(n-1);   
+	} 
+	}
+	
+
diff --git "a/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a5.java" "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a5.java"
new file mode 100644
index 0000000000000000000000000000000000000000..606bf8aeeba3c3b11bc58ec8a57f924bcc490224
--- /dev/null
+++ "b/Java\347\254\254\344\271\235\346\254\241\344\275\234\344\270\232/\351\273\204\345\277\240\347\243\212/a5.java"
@@ -0,0 +1,74 @@
+import java.util.Scanner;
+
+public class a1 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+
+		Scanner scan = new Scanner(System.in);
+		System.out.println("请选择");
+		System.out.println("加法1");
+		System.out.println("减法2");
+		System.out.println("乘法3");
+		System.out.println("除法4");
+		
+		String hello = scan.next();
+		switch (hello) {
+		case "1":
+			System.out.println("请输入第一个数");
+			int b = scan.nextInt();
+			System.out.println("请输入第一个数");
+			int d = scan.nextInt();
+			System.out.println("结果" + b1(d, b));
+
+			break;
+		case "2":
+			System.out.println("请输入第一个数");
+			int e = scan.nextInt();
+			System.out.println("请输入第二个数");
+			int f = scan.nextInt();
+			System.out.println("结果" + b2(e, f));
+			break;
+		case "3":
+			System.out.println("请输入第一个数");
+			int g = scan.nextInt();
+			System.out.println("请输入第二个数");
+			int h = scan.nextInt();
+			System.out.println("结果" + b3(g, h));
+
+			break;
+		case "4":
+			System.out.println("请输入第一个数");
+			int j = scan.nextInt();
+			System.out.println("请输入第二个数");
+			int k = scan.nextInt();
+			System.out.println("结果" + b4(j, k));
+
+			break;
+
+		default:
+			System.out.println("输入错误");
+			break;
+		}
+	}
+
+	public static int b1(int d, int b) {
+		int c = d + b;
+		return c;
+	}
+
+	public static int b2(int e, int f) {
+		int c = e - f;
+		return c;
+	}
+
+	public static int b3(int g, int h) {
+		int c = g * h;
+		return c;
+	}
+
+	public static int b4(int j, int k) {
+		int c = j / k;
+		return c;
+	}
+}