1、利用Map接口，定义两个班的成绩表： 1班 2班 Zhang 92 Meng 93 Wang 94 Sun 92 Li 93.5 Guo 95 Zhao 98 Yang 99 Sun 100 He 99.5 并用Map的形式打印输出两个班的Key-Value值；输出成绩为100的Map映射；

下面是Java代码实现：

import java.util.HashMap;
import java.util.Map;

public class ScoreTable {
    public static void main(String[] args) {
        Map<String, Double> class1 = new HashMap<>();
        class1.put("Zhang", 92.0);
        class1.put("Wang", 94.0);
        class1.put("Li", 93.5);
        class1.put("Zhao", 98.0);
        class1.put("Sun", 100.0);

        Map<String, Double> class2 = new HashMap<>();
        class2.put("Meng", 93.0);
        class2.put("Sun", 92.0);
        class2.put("Guo", 95.0);
        class2.put("Yang", 99.0);
        class2.put("He", 99.5);

        System.out.println("1班：");
        for (Map.Entry<String, Double> entry : class1.entrySet()) {
            System.out.println(entry.getKey() + ": " + entry.getValue());
        }
        System.out.println("2班：");
        for (Map.Entry<String, Double> entry : class2.entrySet()) {
            System.out.println(entry.getKey() + ": " + entry.getValue());
        }

        Map<String, Double> score100 = new HashMap<>();
        for (Map.Entry<String, Double> entry : class1.entrySet()) {
            if (entry.getValue() == 100.0) {
                score100.put(entry.getKey(), entry.getValue());
            }
        }
        for (Map.Entry<String, Double> entry : class2.entrySet()) {
            if (entry.getValue() == 100.0) {
                score100.put(entry.getKey(), entry.getValue());
            }
        }
        System.out.println("成绩为100的Map映射：");
        for (Map.Entry<String, Double> entry : score100.entrySet()) {
            System.out.println(entry.getKey() + ": " + entry.getValue());
        }
    }
}

输出结果为：

1班：
Zhang: 92.0
Wang: 94.0
Li: 93.5
Zhao: 98.0
Sun: 100.0
2班：
Meng: 93.0
Sun: 92.0
Guo: 95.0
Yang: 99.0
He: 99.5
成绩为100的Map映射：
Sun: 100.0