java One ArrayList添加了2个不同的选项

Question

我的问题是我必须使用一个Arraylist并添加两个选项

一,。任务（内容、开始时间、开始时间、难度）

contents- String
startTime,startEnd- Localtime
difficulty- boolean easy/difficult

1. 发生（内容、开始时间、开始时间、重要事项、培训）

contents- String
startTime,startEnd- Localtime
important- boolean Yes/No
training- boolean  Yes/No

是否可以将两个不同的选项合并到一个arraylist

Answer 1

您可以为这些类定义一个通用的超类。例如，一个抽象类或一个接口，然后您将在该超类或接口上创建列表

Answer 2

通用属性的接口

public interface MyI {

    public String getContens();

    public LocalTime getStartTime();

    public LocalTime getStartEnd();

}

然后为独特实例的范围创建模型：

public class Task implements MyI {

    private String contens;

    private LocalTime startTime;

    private LocalTime startEnd;

    private boolean difficulty;

    public boolean isDifficulty() {
        return difficulty;
    }

    public void setDifficulty(boolean difficulty) {
        this.difficulty = difficulty;
    }

    public void setContens(String contens) {
        this.contens = contens;
    }

    public void setStartTime(LocalTime startTime) {
        this.startTime = startTime;
    }

    public void setStartEnd(LocalTime startEnd) {
        this.startEnd = startEnd;
    }

    @Override
    public String getContens() {
        return this.contens;
    }

    @Override
    public LocalTime getStartTime() {
        return this.startTime;
    }

    @Override
    public LocalTime getStartEnd() {
        return this.startEnd;
    }

}

public class Happening implements MyI {

    private String contens;

    private LocalTime startTime;

    private LocalTime startEnd;

    private boolean important;

    private boolean training;

    public boolean isImportant() {
        return important;
    }

    public void setImportant(boolean important) {
        this.important = important;
    }

    public boolean isTraining() {
        return training;
    }

    public void setTraining(boolean training) {
        this.training = training;
    }

    public void setContens(String contens) {
        this.contens = contens;
    }

    public void setStartTime(LocalTime startTime) {
        this.startTime = startTime;
    }

    public void setStartEnd(LocalTime startEnd) {
        this.startEnd = startEnd;
    }

    @Override
    public String getContens() {
        return this.contens;
    }

    @Override
    public LocalTime getStartTime() {
        return this.startTime;
    }

    @Override
    public LocalTime getStartEnd() {
        return this.startEnd;
    }

}

现在，您可以使用界面创建一个列表来保存这两种类型的模型：

List<MyI> myList = new ArrayList<MyI>();