ADD file via upload

jinzhi.java

@@ -0,0 +1,13 @@
+public class jinzhi {
+    public static void main(String[] args) {
+        int a = 15;
+        int n = 0;
+        int i=0;
+        while (a > 0) {
+            n = (int) (n + (a % 2) * Math.pow(10,i));
+            a = a / 2;
+            i=i+1;
+        }
+        System.out.print("十进制a转换二进制n为：" + n);
+    }
+}