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#258 Creating an Immutable Student Class

Companies:
Sberbank
Themes:
JavaOOPPractice

Make the class immutable: 

public class Student {
    Map<String, String> gradesMap;

    public Student(Map<String, String> gradesMap) {
        this.gradesMap = gradesMap;
    }

    public Map<String, String> getGradesMap() {
        return gradesMap;
    }

    public void setGradesMap(Map<String, String> gradesMap) {
        this.gradesMap = gradesMap;
    }
}
var result = personList.stream()...

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