diff --git a/java-base-projects-task/src/main/java/com/swpu/xuruimin/Task1.java b/java-base-projects-task/src/main/java/com/swpu/xuruimin/Task1.java
new file mode 100644
index 0000000000000000000000000000000000000000..12fc34dcc50ef4193cbbcf2cc38aa5157bba70f4
--- /dev/null
+++ b/java-base-projects-task/src/main/java/com/swpu/xuruimin/Task1.java
@@ -0,0 +1,28 @@
+package com.swpu.xuruimin;
+
+public class Task1 {
+
+    public static void main(String[] args) {
+        Task2 task2 = new Task2();
+
+        //有返回值
+        var add = task2.Add(2,3);
+        System.out.println("add = " + add);
+
+        //无返回值
+        task2.Multi(3,4);
+
+        //String
+        var t = task2.Try("hhhhhhhhhhhh");
+        System.out.println("try = " + t);
+
+        //list
+        var list = task2.List();
+        System.out.println("list : " + list);
+
+        //map
+        var map = task2.Map();
+        System.out.println("map : "+ map);
+    }
+}
+
diff --git a/java-base-projects-task/src/main/java/com/swpu/xuruimin/Task2.java b/java-base-projects-task/src/main/java/com/swpu/xuruimin/Task2.java
new file mode 100644
index 0000000000000000000000000000000000000000..1a4adfa8770d022194c68f8387325f210f78372a
--- /dev/null
+++ b/java-base-projects-task/src/main/java/com/swpu/xuruimin/Task2.java
@@ -0,0 +1,50 @@
+package com.swpu.xuruimin;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class Task2 {
+
+    //有返回值
+    public int Add(int a, int b){
+        var y = a + b;
+        return y;
+    }
+
+    //无返回值
+    public void Multi(int a, int b){
+        var y = a * b;
+        System.out.println("y = a * b = "+ y);
+    }
+
+    //String，有返回值
+    public String Try(String string){
+        var y = "hello world!"+string;
+        return y;
+    }
+
+    //list
+    public List<String> List(){
+        var list = new ArrayList<String>();
+
+        list.add("香蕉");
+        list.add("苹果");
+        list.add("牛奶");
+
+        return list;
+    }
+
+    //Map
+    public Map<String,String> Map(){
+        var map = new HashMap<String,String>();
+        var list = List();
+
+        for(var i = 1;i<=list.size();i++){
+            map.put(list.get(i-1),i * 2 + "");
+        }
+        return map;
+
+    }
+}