diff --git a/day04/src/com/inmind/method/Demo01.java b/day04/src/com/inmind/method/Demo01.java
index 8801be1..030ae36 100644
--- a/day04/src/com/inmind/method/Demo01.java
+++ b/day04/src/com/inmind/method/Demo01.java
@@ -28,16 +28,20 @@ package com.inmind.method;
  */
 public class Demo01 {
 
+    public static void main(String[] args) {
+        //调用方法(方法调用处)
+        int a = 10;
+        int b = 20;
+        int sum = getSum(a, b);
+        System.out.println(sum);
+    }
+
     public static int getSum(int p1,int p2) {
         int sum = p1 + p2;
         return sum;
     }
 
-    public static void main(String[] args) {
-        //调用方法(方法调用处)
-        int sum = getSum(10, 20);
-        System.out.println(sum);
-    }
+
 
 
 
diff --git a/day04/src/com/inmind/method/Demo02.java b/day04/src/com/inmind/method/Demo02.java
new file mode 100644
index 0000000..2bd370f
--- /dev/null
+++ b/day04/src/com/inmind/method/Demo02.java
@@ -0,0 +1,72 @@
+package com.inmind.method;
+/*
+方法练习1_比较两个整数是否相同
+方法练习2_运算1到n的累和
+方法练习3_打印n遍HelloWorld.
+
+注意：
+   方法定义一定要先确定2个明确：
+        1.明确返回值类型
+        2.明确参数列表
+ */
+public class Demo02 {
+    public static void main(String[] args) {
+        int a = 10;
+        int b = 10;
+        boolean result = isEqual(a, b);
+        System.out.println(result);
+        System.out.println("-------------------");
+        int sum = getLH(10);
+        System.out.println(sum);//6
+        System.out.println("-------------------");
+        printN(10);
+    }
+
+
+    /**
+     * 方法练习3_打印n遍HelloWorld.
+     * @param n 打印的次数
+     */
+    public static void printN(int n){
+        for (int i = 0; i < n; i++) {
+            System.out.println("HelloWorld");
+        }
+    }
+
+
+    /**
+     * 方法练习2_运算1到n的累和
+     * @param n 动态传入累加的数值
+     * @return 1~n的累和
+     */
+    public static int getLH(int n) {
+        int sum = 0;
+        //n的循环累加即可
+        for (int i = 1; i <= n; i++) {
+            //sum = sum + i;
+            sum += i;
+        }
+        return sum;
+    }
+
+
+
+
+
+
+    /**
+     * 方法练习1_比较两个整数是否相同
+     * @param a 用来判断是否相同的形参1
+     * @param b 用来判断是否相同的形参2
+     * @return 2个形参是否相同，true或者false
+     */
+    public static boolean isEqual(int a,int b) {
+        /*if (a == b) {
+            return true;
+        } else {
+            return false;
+        }*/
+        return a == b;
+    }
+
+}