未經(jīng)檢查的轉(zhuǎn)換：'java.io.Serialized' 到 'java.util.ArrayList'我的代碼是這樣的：Activity.javaArrayList<Department> departments = new ArrayList<>();Intent i = getIntent();departments = (ArrayList<Department>) i.getSerializableExtra("DepartmentList");Department.javapublic class Department implements Serializable {    private int department_id;    private String dept_name;    private ArrayList<Course> courses;    private ArrayList<Batch>batches;    public Department() {    }    public ArrayList<Batch> getBatches() {        return batches;    }    public void setBatches(ArrayList<Batch> batches) {        this.batches = batches;    }    public int getDepartment_id() {        return department_id;    }    public void setDepartment_id(int department_id) {        this.department_id = department_id;    }    public String getDept_name() {        return dept_name;    }    public void setDept_name(String dept_name) {        this.dept_name = dept_name;    }    public ArrayList<Course> getCourses() {        return courses;    }    public void setCourses(ArrayList<Course> courses) {        this.courses = courses;    }    @Override    public String toString() {        return dept_name;    }}該應(yīng)用程序運行良好，但我收到以下消息：未經(jīng)檢查的強(qiáng)制轉(zhuǎn)換：'java.io.Serialized' 到 'java.util.ArrayList' 檢查信息：向編譯器發(fā)出未經(jīng)檢查的警告的位置發(fā)出信號，例如：void f(HashMap map) { map.put("key", "value"); }提示：將 -Xlint:unchecked 傳遞給 javac 以獲取更多詳細(xì)信息。