### Question:
ST_Array extends STBase implements Cloneable { public Integer[] toInt() { return this.array.stream() .map(Integer::parseInt) .toArray(Integer[]::new); } ST_Array(Serializable... arr); static ST_Array unitCTM(); ST_Array mtxMul(ST_Array array); static ST_Array getInstance(String arrStr); ST_Array add(String item); List<String> getArray(); Double[] toDouble(); Integer[] toInt(); ST_Array setArray(List<String> array); int size(); double[][] toMtx(); void printMtx(); @Override ST_Array clone(); @Override String toString();  }### Answer:
@Test void toInt() { ST_Array arr = new ST_Array("7", "7", "7", "7", "7", "7", "7"); assertArrayEquals(arr.toInt(), new Integer[]{7, 7, 7, 7, 7, 7, 7}); System.out.println(arr); arr = ST_Array.getInstance("7 7 7 7 7 7 7"); assertArrayEquals(arr.toInt(), new Integer[]{7, 7, 7, 7, 7, 7, 7}); }