Java: 2个字段分组的removeIf总和等于0

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

public class Main {
    public static void main(String[] args) {
        // 创建存储对象的List集合
        List<CustomObject> list = new ArrayList<>();

        // 向集合中添加对象
        list.add(new CustomObject(1, 2));
        list.add(new CustomObject(3, -3));
        list.add(new CustomObject(5, -5));
        list.add(new CustomObject(-6, 6));

        // 输出原始集合
        System.out.println("原始集合：" + list);

        // 对集合进行分组的removeIf操作
        list.removeIf(obj -> obj.getField1() + obj.getField2() == 0);

        // 输出处理后的集合
        System.out.println("处理后的集合：" + list);
    }
}

// 自定义的存储对象
class CustomObject {
    private int field1;
    private int field2;

    public CustomObject(int field1, int field2) {
        this.field1 = field1;
        this.field2 = field2;
    }

    public int getField1() {
        return field1;
    }

    public void setField1(int field1) {
        this.field1 = field1;
    }

    public int getField2() {
        return field2;
    }

    public void setField2(int field2) {
        this.field2 = field2;
    }

    @Override
    public String toString() {
        return "(" + field1 + ", " + field2 + ")";
    }
}