diff --git a/w3/Employee.java b/w3/Employee.java
new file mode 100644
index 0000000..de2dd49
--- /dev/null
+++ b/w3/Employee.java
@@ -0,0 +1,101 @@
+public class Employee {
+
+    // 静态变量：公司名称
+    private static String companyName = "ABC科技有限公司";
+
+    // 最低工资标准
+    private static final double MIN_SALARY = 2000.0;
+
+    // 属性：工号、姓名、部门、工资
+    private String id;
+    private String name;
+    private String department;
+    private double salary;
+
+    // 全参构造方法（同时为 companyName 赋值）
+    public Employee(String id, String name, String department, double salary) {
+        this.id = id;
+        this.name = name;
+        this.department = department;
+        // 使用 setSalary 确保工资合法
+        setSalary(salary);
+    }
+
+    // ==================== Getter & Setter ====================
+
+    public static String getCompanyName() {
+        return companyName;
+    }
+
+    public static void setCompanyName(String companyName) {
+        Employee.companyName = companyName;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDepartment() {
+        return department;
+    }
+
+    public void setDepartment(String department) {
+        this.department = department;
+    }
+
+    public double getSalary() {
+        return salary;
+    }
+
+    /**
+     * 设置工资，工资必须大于等于最低工资标准（2000）
+     */
+    public void setSalary(double salary) {
+        if (salary >= MIN_SALARY) {
+            this.salary = salary;
+        } else {
+            System.out.println("警告：工资不能低于最低工资标准 " + MIN_SALARY
+                    + " 元，已自动设置为最低工资标准。");
+            this.salary = MIN_SALARY;
+        }
+    }
+
+    /**
+     * 按百分比涨工资
+     * percent 为 5 表示增加 5%
+     * 增加后仍不低于最低工资
+     */
+    public void raiseSalary(double percent) {
+        double newSalary = this.salary * (1 + percent / 100.0);
+        if (newSalary < MIN_SALARY) {
+            newSalary = MIN_SALARY;
+        }
+        this.salary = newSalary;
+        System.out.printf("涨薪 %.1f%%，%s 的新工资为：%.2f 元%n", percent, this.name, this.salary);
+    }
+
+    /**
+     * 输出员工信息
+     */
+    public void printInfo() {
+        System.out.println("==============================");
+        System.out.println("公司：" + companyName);
+        System.out.println("工号：" + id);
+        System.out.println("姓名：" + name);
+        System.out.println("部门：" + department);
+        System.out.printf("工资：%.2f 元%n", salary);
+        System.out.println("==============================");
+    }
+}
diff --git a/w3/TestEmployee.java b/w3/TestEmployee.java
new file mode 100644
index 0000000..2fb4c6e
--- /dev/null
+++ b/w3/TestEmployee.java
@@ -0,0 +1,49 @@
+public class TestEmployee {
+
+    public static void main(String[] args) {
+
+        System.out.println("===== 创建员工对象 =====\n");
+
+        // 创建第一个员工
+        Employee emp1 = new Employee("E001", "张三", "研发部", 8000);
+        emp1.printInfo();
+
+        // 创建第二个员工（故意传入低于最低工资的值，演示 setSalary 校验）
+        Employee emp2 = new Employee("E002", "李四", "市场部", 1500);
+        emp2.printInfo();
+
+        System.out.println("\n===== 演示属性修改（setter）=====\n");
+
+        // 修改 emp1 的部门和工资
+        emp1.setDepartment("产品部");
+        emp1.setSalary(9500);
+        System.out.println("修改后 emp1 信息：");
+        emp1.printInfo();
+
+        // 用 setSalary 尝试将 emp2 工资设置为低于最低工资
+        System.out.println("尝试将 emp2 工资设置为 800：");
+        emp2.setSalary(800);
+        emp2.printInfo();
+
+        System.out.println("\n===== 演示涨薪（raiseSalary）=====\n");
+
+        // emp1 涨薪 5%
+        emp1.raiseSalary(5);
+        // emp2 涨薪 10%
+        emp2.raiseSalary(10);
+
+        System.out.println("\n===== 涨薪后完整信息 =====\n");
+        emp1.printInfo();
+        emp2.printInfo();
+
+        System.out.println("\n===== 演示静态变量 companyName =====\n");
+
+        System.out.println("当前公司名称：" + Employee.getCompanyName());
+        Employee.setCompanyName("XYZ集团");
+        System.out.println("修改后公司名称：" + Employee.getCompanyName());
+
+        // 静态变量是所有对象共享的，两个对象的公司名都变了
+        emp1.printInfo();
+        emp2.printInfo();
+    }
+}