diff --git "a/\344\275\234\344\270\232/HashTable.java" "b/\344\275\234\344\270\232/HashTable.java"
new file mode 100644
index 0000000000000000000000000000000000000000..c2de89ef97f5403ef0173aa54ce11c08abbf9499
--- /dev/null
+++ "b/\344\275\234\344\270\232/HashTable.java"
@@ -0,0 +1,48 @@
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.Iterator;
+public class HashTable {
+    private final int DEFAULT_TABLE_SIZE = 17;
+    private ArrayList<LinkedList<Student>> array = null;
+    HashTable(){
+        array = new ArrayList<LinkedList<Student>>(DEFAULT_TABLE_SIZE);  
+	for (int i = 0; i < DEFAULT_TABLE_SIZE; i++) {
+		array.add(null);
+                }
+    }
+    public int hash(int id){
+        return id % DEFAULT_TABLE_SIZE;
+    }
+    public void put(Student stu){
+        // 1. 将id hash到[0-16]之间
+        int hashValue = hash(stu.id);
+        // 2. 将stu放入array中hashValue对应的链表
+        array.get(hashValue).addFirst(stu);
+    }
+    public Student get(int id){
+        int hashValue=hash(id);
+        LinkedList<Student> student=array.get(hashValue);
+        for(int i=0;i<student.size();i++){
+           if(student.get(i).id==studentid){
+              Student student=student.get(i);
+              delete(studentId);
+              students.addFirst(student);
+              return students.getFirst();
+           }
+        }
+        return null;
+    }
+    public void delete(int id){
+        int hashValue = hash(id);
+        LinkedList<Student>students = array.get(hashValue);
+        for(int i = 0; i < students.size();i ++){
+	if(students.get(i).id == id){
+	     students.remove(i);
+                     break;
+                }
+         }
+     }
+}
+        
+       
+      
\ No newline at end of file
diff --git "a/\344\275\234\344\270\232/Main.java" "b/\344\275\234\344\270\232/Main.java"
new file mode 100644
index 0000000000000000000000000000000000000000..2bd92e72f981e0f98a10371a2dc5e8718293d759
--- /dev/null
+++ "b/\344\275\234\344\270\232/Main.java"
@@ -0,0 +1,13 @@
+class Main {
+    public static void main(String[] args){
+         HashTable ht = new HashTable();
+         Student st1 = new Student(60, "Albert", "1996.10.01", "Male");
+
+         ht.put(st1);
+         System.out.println(ht.get(60));
+
+         Student st3= new Student(20, "abc", "1990.01.01", "Male");
+         ht.put(st2);
+         System.out.println(ht.get(20));
+	}
+}
\ No newline at end of file
diff --git "a/\344\275\234\344\270\232/Stuednt.java" "b/\344\275\234\344\270\232/Stuednt.java"
new file mode 100644
index 0000000000000000000000000000000000000000..7c61fa3a2db3a045ad2664a44b3e843a3f40dfc9
--- /dev/null
+++ "b/\344\275\234\344\270\232/Stuednt.java"
@@ -0,0 +1,18 @@
+public class Stuednt{
+    public int id;
+    public String name;
+    public String birthday;
+    public String sex;
+
+	Student(int id, String name, String birthday, String sex){
+		this.id = id;
+		this.name = name;
+		this.birthday = birthday;
+		this.sex = sex;
+	}
+
+	public String toString(){
+		return Integer.toSring(id) + " " + name + " " + birthday + " " + sex;
+	}
+}
+}
\ No newline at end of file