diff --git "a/15 \346\262\210\347\206\231\347\245\245/20230320 \344\275\234\344\270\232.md" "b/15 \346\262\210\347\206\231\347\245\245/20230320 \344\275\234\344\270\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..6bc6573c3385ec2f4dd0d8918ac847a1e0756f04
--- /dev/null
+++ "b/15 \346\262\210\347\206\231\347\245\245/20230320 \344\275\234\344\270\232.md"	
@@ -0,0 +1,79 @@
+```java
+public class s {
+    public static void main(String[] args) {
+        System.out.println("1");
+        System.out.println("1");
+        System.out.println("1");
+        System.out.println("1");
+        System.out.println("1");
+        System.out.println('1');
+        System.out.println('1');
+        System.out.println('1');
+        System.out.println('1');
+        System.out.println('1');
+        System.out.println(true);
+        System.out.println(false);
+        byte b1 = -128;
+        byte b2 = 127;
+        System.out.println(b1);
+        System.out.println(b2);
+
+        short s1 = -32768;
+        short s2 = 32767;
+        System.out.println(s1);
+        System.out.println(s2);
+
+        int i1 = -2147483648;
+        int i2 = 2147483647;
+        System.out.println(i1);
+        System.out.println(i2);
+
+        long l1 = -2147483649L;
+        long l2 = 2147483648L;
+        System.out.println(l1);
+        System.out.println(l2);
+
+        float f1 = -3.14F;
+        float f2 = 3.14F;
+        System.out.println(f1);
+        System.out.println(f2);
+
+        double d1 = -3.4;
+        double d2 = 3.4;
+        System.out.println(d1);
+        System.out.println(d2);
+
+        int a = 1;
+        int b = 2;
+        int t = a;
+        a = b;
+        b = t;
+        System.out.println(a);
+        System.out.println(b);
+
+        int x = 100;
+        int y = 200;
+        int add = x + y;
+        int sub = x - y;
+        int mul = x * y;
+        int div = x / y;
+        System.out.println("x,y和为"+add);
+        System.out.println("x,y差为"+sub);
+        System.out.println("x,y积为"+mul);
+        System.out.println("x,y商为"+div);
+
+        double x1 = 100.8;
+        double y1 = 20.6;
+        double add1 = x1 + y1;
+        double sub1 = x1 - y1;
+        double mul1 = x1 * y1;
+        double div1 = x1 / y1;
+        System.out.println("x,y和为"+add1);
+        System.out.println("x,y差为"+sub1);
+        System.out.println("x,y积为"+mul1);
+        System.out.println("x,y商为"+div1);
+
+    }
+}
+
+```
diff --git "a/15 \346\262\210\347\206\231\347\245\245/20230327 \344\275\234\344\270\232.md" "b/15 \346\262\210\347\206\231\347\245\245/20230327 \344\275\234\344\270\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..e12165f96b07381aff9978f97f4765333c15461b
--- /dev/null
+++ "b/15 \346\262\210\347\206\231\347\245\245/20230327 \344\275\234\344\270\232.md"	
@@ -0,0 +1,49 @@
+```java
+//判断一个字符数据是否是数字字符
+    public static void pdszzf(char a){
+        if (a>='0' && a<='9') {
+            System.out.println("是数字字符");
+        }else {
+            System.out.println("不是数字字符");
+        }
+    }
+    //判断一个字符数据是否是字母字符
+    private static void pdzmzf(char a){
+        if (a>='a' && a<='z' || a>='A' && a<='Z'){
+            System.out.println("是字母字符");
+        }else {
+            System.out.println("不是字母字符");
+        }
+    }
+    //判断指定的年份是否为闰年，请使用键盘录入
+    private static void pdrn(int a){
+        if (a%4 == 0 && a%100!=0 || a%400==0){
+            System.out.println("是闰年");
+        }else {
+            System.out.println("不是闰年");
+        }
+    }
+    //判断一个数字是否为水仙花数,请使用键盘录入
+    private static void pdsxhs(int a){
+        int ge = a%10;
+        int shi = a%100/10;
+        int bai = a/100;
+        if (ge*ge*ge+shi*shi*shi+bai*bai*bai==a){
+            System.out.println("是水仙花数");
+        }else {
+            System.out.println("不是水仙花数");
+        }
+    }
+    //判断一个5位数字是否为回文数，使用键盘录入
+    private static void pdhws(int a){
+        int ge = a%10;
+        int shi = a%100/10;
+        int qian = a/1000%10;
+        int wan = a/10000;
+        if (ge==wan && shi==qian){
+            System.out.println("是回文数");
+        }else {
+            System.out.println("不是回文数");
+        }
+    }
+```
\ No newline at end of file