java List去除重复内容

最新推荐文章于 2025-04-13 00:34:00 发布

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本文通过一个具体的Java代码示例，展示了如何对一个包含重复学生信息的列表进行去重处理，确保每个学生的ID唯一。该过程涉及到了自定义类、泛型列表以及条件判断等知识点。

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public class Student {
    private Integer id;
    private String name;
    private Integer age;
    public Student(Integer id, String name, Integer age) {
        super();
        this.id = id;
        this.name = name;
        this.age = age;
    }
    public Student() {
        super();
    }
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    @Override
    public String toString() {
        return "[id=" + id + ", name=" + name + ", age=" + age + "]";
    }

}


``public static void main(String[] args) {
        List<Student> stuList = new ArrayList<Student>();
        stuList.add(new Student(1,"qq",12));
        stuList.add(new Student(4,"qq",12));
        stuList.add(new Student(2,"qq",12));
        stuList.add(new Student(3,"qq",12));
        stuList.add(new Student(1,"qq",12));
        stuList.add(new Student(3,"qq",12));
        stuList.add(new Student(1,"qq",12));
        stuList.add(new Student(2,"qq",12));
        for(int i=stuList.size()-1;i>0;i--){
            Student stu = (Student)stuList.get(i);
            for(int j=i-1;j>=0;j--){
                Student stu1 = (Student)stuList.get(j);
                if(stu.getId().equals(stu1.getId())){
                    stuList.remove(j);
                    break;
                }
            }
        }
        for(Student stu : stuList){
            System.out.println(stu);
        }
        System.out.println(stuList.size());
    }