删除Java列表中的双重对象

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class RemoveDuplicates {
    public static void main(String[] args) {
        List<MyObject> list = new ArrayList<>();
        // 添加一些对象到列表中
        list.add(new MyObject(1));
        list.add(new MyObject(2));
        list.add(new MyObject(1)); // 重复的对象

        Set<MyObject> set = new HashSet<>(list);
        List<MyObject> newList = new ArrayList<>(set);

        // 打印新列表，检查重复项是否被移除
        for (MyObject obj : newList) {
            System.out.println(obj);
        }
    }
}

class MyObject {
    private int id;

    public MyObject(int id) {
        this.id = id;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        MyObject myObject = (MyObject) o;
        return id == my.javaObject.id;
    }

    @Override
    public int hashCode() {
        return Integer.hashCode(id);
    }

    @Override
    public String toString() {
        return "MyObject{" +
                "id=" + id +
                '}';
    }
}

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

public class RemoveDuplicates {
    public static void main(String[] args) {
        List<MyObject> list = new ArrayList<>();
        // 添加一些对象到列表中
        list.add(new MyObject(1));
        list.add(new MyObject(2));
        list.add(new MyObject(1)); // 重复的对象

        List<MyObject> newList = list.stream()
                .distinct()
                .collect(Collectors.toList());

        // 打印新列表，检查重复项是否被移除
        for (MyObject obj : newList) {
            System.out.println(obj);
        }
    }
}

import java.util.ArrayList;
import java.util.List;

public class RemoveDuplicates {
    public static void main(String[] args) {
        List<MyObject> list = new ArrayList<>();
        // 添加一些对象到列表中
        list.add(new MyObject(1));
        list.add(new MyObject(2));
        list.add(new MyObject(1)); // 重复的对象

        List<MyObject> newList = new ArrayList<>();
        for (MyObject obj : list) {
            if (!newList.contains(obj)) {
                newList.add(obj);
            }
        }

        // 打印新列表，检查重复项是否被移除
        for (MyObject obj : newList) {
            System.out.println(obj);
        }
    }
}