未经检查的转换：'java.io.Serializable' 到 'java.util.

Question

未经检查的转换：'java.io.Serialized' 到 'java.util.ArrayList'我的代码是这样的：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;    }}该应用程序运行良好，但我收到以下消息：未经检查的强制转换：'java.io.Serialized' 到 'java.util.ArrayList' 检查信息：向编译器发出未经检查的警告的位置发出信号，例如：void f(HashMap map) { map.put("key", "value"); }提示：将 -Xlint:unchecked 传递给 javac 以获取更多详细信息。

Answer 1

您的模型类 Department 应该实现如下所示的 Selialized

public class Department implements Serializable {

private String itemName;

public Department(String itemName) {

        this.itemName = itemName;

    }

 String getItemName() {

        return itemName;

    }

    void setItemName(String itemName) {

        this.itemName = itemName;

    }

}

希望它能起作用。请尝试一下