diff --git a/W3/Employee.java b/W3/Employee.java
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--- /dev/null
+++ b/W3/Employee.java
@@ -0,0 +1,45 @@
+public class Employee {
+    // 私有实例变量
+    private String id;
+    private String name;
+    private String department;
+    private double salary;
+
+    // 静态变量（所有员工共享）
+    private static String companyName;
+
+    // 最低工资常量
+    public static final double MIN_SALARY = 2000.0;
+
+    // 构造方法
+    public Employee(String id, String name, String department, double salary) {
+        this.id = id;
+        this.name = name;
+        this.department = department;
+
+        // 工资校验
+        if (salary >= MIN_SALARY) {
+            this.salary = salary;
+        } else {
+            this.salary = MIN_SALARY;
+        }
+
+        // 给公司名称赋值
+        companyName = "我的公司";
+    }
+
+    // 显示员工信息
+    public void showInfo() {
+        System.out.println("工号：" + id);
+        System.out.println("姓名：" + name);
+        System.out.println("部门：" + department);
+        System.out.println("工资：" + salary);
+        System.out.println("公司：" + companyName);
+    }
+
+    // 程序入口
+    public static void main(String[] args) {
+        Employee emp = new Employee("001", "张三", "技术部", 5000);
+        emp.showInfo();
+    }
+}
\ No newline at end of file
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