Question

我有一个Location类，它存储多个位置对象，从JSON文件解析。目前，我可以使用toString（）方法打印列表中的所有位置。输出如下：

这是列表中某个位置的示例：

Location [location=null, id=3, description=You are at battlefield of Jerusalem. You are in awe of your surroundings, you see an exit to the west., weight=100, name=Jerusalem, exit=[Exit [title=Hattin, direction=West]]],

但我想知道如何通过字段值id打印出该列表中的特定位置，例如id =“2”的位置？

我认为可以创建一个覆盖toString方法来获取id的输入，并打印相应的位置对象，但不知道如何通过'id'打印：

if(LocationObject.getId() == "2") {
      //do something
}

这是存储对象的POJO Location类：

public class Location {

    private Location[] location;

    private int id;

    private String description;

    private String weight;

    private String name;

    private Exit[] exit;

    private boolean visited = false;
    private boolean goalLocation;
    private int approximateDistanceFromGoal = 0;
    private Location parent;




    public Location[] getLocation() {
        return location;
    }

    public void setLocation(Location[] location) {
        this.location = location;
    }


    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getDescription ()
    {
        return description;
    }

    public void setDescription (String description)
    {
        this.description = description;
    }


    public String getWeight() {
        return weight;
    }

    public void setWeight(String weight) {
        this.weight = weight;
    }

    public String getName ()
    {
        return name;
    }

    public void setName (String name)
    {
        this.name = name;
    }

    public Exit[] getExit() {
        return exit;
    }

    public void setExit(Exit[] exit) {
        this.exit = exit;
    }

    @Override
    public String toString() {
        return "Location [location=" + Arrays.toString(location) + ", id=" + id
                + ", description=" + description + ", weight=" + weight
                + ", name=" + name + ", exit=" + Arrays.toString(exit)
                +"]";
    }



}

Answer 1

尝试检查ID

if(LocationObject.getId() == "2") {
      System.out.println(LocationObject.getDescription());
}

如何在对象的数组列表中按字段id打印特定对象？

1 个答案: