Stringbuilder richtig einsetzen

[PeterMaffay99]

Hey,
wie sähe denn eine vereinfachte Stringbuilder Version der beiden toString Methoden aus ? Finde meine Lösung etwas zu umständlich :/

   @Override
    public String toString(){
        String str = "SHARE;" + name + ";;;";
        if (this.data != null && !this.data.isEmpty()) {
            str+="\n";
            data.sort(Dataset::compareTo);
            Object[] dataarray = data.toArray();
            for (int i = 0; i < dataarray.length; ++i) {
                Dataset set = (Dataset) dataarray[i];
                    if (i==dataarray.length-1){
                        str+=set.toString();
                    }
                    else
                    str += set.toString()+"\n";

            }
        }
        return str;

    public String toString(){
        String str = "date;open;high;low;close";
        List<String> list = new ArrayList(shares.keySet());
        Collections.sort(list);
        if (!list.isEmpty()){
            str+="\n";
        }
        int i = 0;
        for (String key : list){
            ++i;
            Share val = shares.get(key);
            if (i==shares.size())
                str+= val.toString();
            else
                str += val.toString() +"\n";
        }
        return str;

    }

 

[mihe7]

Wenn es mit StringBuilder sein soll:

    public String toString(){
        StringBuilder b = new StringBuilder("SHARE;").append(name).append(";;;");
        if (this.data != null && !this.data.isEmpty()) {
            data.sort(Dataset::compareTo);
            for (Dataset set : data) {
                b.append("\n").append(set.toString());
            }
        }
        return b.toString();
    }

Analog

    public String toString(){
        StringBuilder b = new StringBuilder("date;open;high;low;close");
        List<String> list = new ArrayList(shares.keySet());
        Collections.sort(list);
        for (String key : list){
            b.append("\n").append(key);
        }
        return b.toString();
    }