diff --git a/jjcc.java b/jjcc.java
new file mode 100644
index 0000000..b1c1260
--- /dev/null
+++ b/jjcc.java
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+package jjcc;
+import java.sql.*;
+public class jjcc {
+	//addition函数实现的是两个数x和y的加法运算
+		public void addition(double  x,double  y) {
+			double  result;
+			result=x+y;
+			System.out.println(x+"+"+y+"="+result);
+			}
+	//subtraction函数实现的是两个数x和y的减法运算
+		public void subtraction(double x,double y) {
+			double result;
+			result=x-y;
+			System.out.println(x+"-"+y+"="+result);
+		}
+	//multiplication函数实现的是两个数x和y的乘法运算
+		public void multiplication(double  x,double  y) {
+			double  result;
+			result=x*y;
+			System.out.println(x+"*"+y+"="+result);
+		}
+	//division函数实现的是两个数x和y的除法运算
+		public void division(double  x,double  y) {
+			double  result;
+			result=x/y;
+			System.out.println(x+"/"+y+"="+result);
+		}
+}