public <V> V convertFrom(final char[] text) {
        if (text == null) return null;
        return (V) convertFrom(text, 0, text.length);
    }
public < V > V convertFrom ( final char [ ] text ) { if ( text == null ) return null ; return ( V ) convertFrom ( text , 0 , text . length ) ; }
返回非null的值是由String、ArrayList、HashMap任意组合的对象