java实现，成绩是个抽象类，然后有两个子类考试成绩和考核成绩

好的，我可以为您提供一个简单的成绩信息管理系统Java实现的代码示例，具体实现如下：

首先，定义一个抽象类Score（成绩类）：

public abstract class Score {
    protected String subject; // 科目
    protected double score; // 成绩

    public Score(String subject, double score) {
        this.subject = subject;
        this.score = score;
    }

    public String getSubject() {
        return subject;
    }

    public void setSubject(String subject) {
        this.subject = subject;
    }

    public double getScore() {
        return score;
    }

    public void setScore(double score) {
        this.score = score;
    }

    public abstract String getType(); // 获取成绩类型
}

然后，定义两个子类ExamScore（考试成绩）和CheckScore（考核成绩）：

public class ExamScore extends Score {
    public ExamScore(String subject, double score) {
        super(subject, score);
    }

    @Override
    public String getType() {
        return "考试成绩";
    }
}

public class CheckScore extends Score {
    public CheckScore(String subject, double score) {
        super(subject, score);
    }

    @Override
    public String getType() {
        return "考核成绩";
    }
}

接着，实现一个成绩信息管理类ScoreManager：

import java.util.ArrayList;

public class ScoreManager {
    private ArrayList<Score> scores; // 成绩列表

    public ScoreManager() {
        scores = new ArrayList<>();
    }

    // 添加成绩
    public void addScore(Score score) {
        scores.add(score);
    }

    // 获取所有成绩
    public ArrayList<Score> getAllScores() {
        return scores;
    }

    // 获取某个科目的成绩
    public ArrayList<Score> getScoresBySubject(String subject) {
        ArrayList<Score> result = new ArrayList<>();
        for (Score score : scores) {
            if (score.getSubject().equals(subject)) {
                result.add(score);
            }
        }
        return result;
    }

    // 获取某个类型的成绩
    public ArrayList<Score> getScoresByType(String type) {
        ArrayList<Score> result = new ArrayList<>();
        for (Score score : scores) {
            if (score.getType().equals(type)) {
                result.add(score);
            }
        }
        return result;
    }
}

最后，可以测试一下：

public class Main {
    public static void main(String[] args) {
        ScoreManager manager = new ScoreManager();

        ExamScore examScore1 = new ExamScore("数学", 90);
        ExamScore examScore2 = new ExamScore("英语", 80);
        CheckScore checkScore1 = new CheckScore("语文", 95);
        CheckScore checkScore2 = new CheckScore("体育", 85);

        manager.addScore(examScore1);
        manager.addScore(examScore2);
        manager.addScore(checkScore1);
        manager.addScore(checkScore2);

        ArrayList<Score> allScores = manager.getAllScores();
        System.out.println("所有成绩：");
        for (Score score : allScores) {
            System.out.println(score.getSubject() + " " + score.getType() + " " + score.getScore());
        }

        ArrayList<Score> mathScores = manager.getScoresBySubject("数学");
        System.out.println("数学成绩：");
        for (Score score : mathScores) {
            System.out.println(score.getType() + " " + score.getScore());
        }

        ArrayList<Score> checkScores = manager.getScoresByType("考核成绩");
        System.out.println("考核成绩：");
        for (Score score : checkScores) {
            System.out.println(score.getSubject() + " " + score.getScore());
        }
    }
}

输出结果：

所有成绩：
数学 考试成绩 90.0
英语 考试成绩 80.0
语文 考核成绩 95.0
体育 考核成绩 85.0
数学成绩：
考试成绩 90.0
考核成绩：
语文 95.0
体育 85.0