public int getScore(String name) {

Integer score;

score=this.cache.get(name);

if(score==null) {

score=this.findInList(name);

this.cache.put(name, score);

}

return score;

}

public int findInList(String name) {

int score=-1;

for(var stu:this.list) {

if(name.equals(stu.getName())) {

score=stu.getScore();

}

}

return score;

}