任何人都可以帮忙这个方法此方法必须返回int类型的结果

我被困在这里，我想打印这些值，但它不允许我这样做。请帮助

public int horaPraticada(Intervalo crime) {
    if (inicio != crime.getStart() && fim != crime.getEnd()) {
    
        return  (crime.getEnd() - crime.getStart()); }
        
    if (inicio > crime.getStart() && fim < crime.getEnd()) {
        return  (crime.getEnd() - crime.getStart());
    }
    if (inicio == crime.getStart() && fim > crime.getEnd()) {
        
        return (crime.getEnd() - crime.getStart());
    }
    if (inicio != crime.getStart() && fim == crime.getEnd()) {
        return (crime.getEnd() - crime.getStart());
    
    }
    
    
    
    
}