Kuxazululiwe: udala kanjani uchungechunge lweyunithi yezinhlamvu eziguqukayo

Ukubhala amakhodi ku-Java kunikeza inqwaba yamathuba, ikakhulukazi uma kuziwa ekudalweni kweyunithi yezinhlamvu ezishintshashintshayo. Izinhlu ku-Java izinto ezibamba inombolo egxilile yamanani ohlobo olulodwa - kungaba izinombolo, izinhlamvu, iyunithi yezinhlamvu, nanoma yiluphi olunye uhlobo. Amalungu afanayo anamandla, ngakolunye uhlangothi, anganwebeka njengoba kudingeka ukuze afake izinto ezintsha.

Ukuqonda i-Dynamic String Arrays ku-Java

Ku-Java, ama-arrays amisiwe ngosayizi. Uma usumemezele usayizi welungu elifanayo phakathi nokudalwa kwalo, awukwazi ukulishintsha. Lokhu kuqina kubangela izinselele lapho usebenza nenombolo ehlukahlukene yokokufaka kwedatha, yingakho isidingo samalungu afanayo aguqukayo noma amaqoqo afana Uhlu Lwezinhlu. Uhlu Lwezinhlu luyisakhiwo sedatha esiguqukayo esivumela ukugcinwa kwezinto zohlobo oluthile.

import java.util.ArrayList;
public class Main {
public static void main(String[] args) {
    ArrayList <String> dynamicArray = new ArrayList<>();
    dynamicArray.add("Hello");
    dynamicArray.add("World");
    System.out.println(dynamicArray);
    }
}

Isinyathelo Ngesinyathelo Umhlahlandlela Wokudala Izinhlu Zezintambo Ezinamandla

Ukudala iyunithi yezinhlamvu eguquguqukayo ku-Java kuyinqubo eqondile, ehlanganisa ukusebenzisa isigaba se-ArrayList. Nansi indlela esebenza ngayo:

1. Okokuqala, ngenisa iphakheji ye-Java Utils, equkethe isigaba se-ArrayList.
2. Memezela futhi uqinisekise i-ArrayList, ucacise uhlobo lwedatha njengeString kubakaki be-engeli.
3. Sebenzisa indlela ye-add() ukuze ufake izakhi kulungu elifanayo.
4. Ukuze ubonise izici ze-array, ungaphrinta lonke i-ArrayList.

import java.util.ArrayList; // 1. Importing package
public class Main {
public static void main(String[] args) {
    ArrayList <String> dynamicArray = new ArrayList<>(); // 2. Declaration
    dynamicArray.add("Hello"); // 3. Adding elements
    dynamicArray.add("World");
    System.out.println(dynamicArray); // 4. Displaying elements
    }
}

Ukuqonda nokusebenzisa Imitapo yolwazi ye-Java

I-Java, ulimi lokuhlela lwezinga eliphezulu, inothe ngemitapo yolwazi, eyizingcezu zekhodi ezingasebenziseka kabusha ezigcinwayo futhi ezabelwa onjiniyela. Ngokuhlinzeka ngamakilasi ahlukahlukene kanye nokuxhumana, lezi Imitapo yolwazi ye-Java vumela ukuthuthukiswa kwekhodi esebenzisekayo kabusha ngendlela elula nelula.

Ngokwengqikithi yengxoxo yethu, iphakheji elithi `java.util` liwumtapo wezincwadi we-Java ophawulekayo. Ihlanganisa ikilasi elithi `ArrayList`, isiqalisi sohlelo `lohlu`, oluguquguqukayo futhi olungabonwa njengokuthatha indawo yamalungu afanayo. Abaqalayo bohlelo lwe-Java, ikakhulukazi, bazothola `i-ArrayList` inenzuzo ngokwedlulele ohlelweni lokufunda ulimi nokusebenzisa amalungu afanayo ashukumisayo.

Khumbula, nokho, ukuthi isigaba se-ArrayList asisekeli izinhlobo zakudala njenge-int. Ngokulandelayo, singasebenzisa amakilasi okugoqa afana nokuthi `Integer`, `Character`, nokuthi `Boolean`, esikhundleni salokho. Isibonelo, ukwakha i-ArrayList yokugcina izinombolo, sizosebenzisa `ArrayList`.

Ukuqonda ukuthi ungawakha kanjani futhi uwasebenzise kanjani amayunithi ezinhlamvu aguqukayo ku-Java kuthuthukisa ukuguquguquka kwekhodi yakho nokufunda. Kwenza ukuphathwa kwamaqoqo edatha kube lula nangempumelelo. Jabulela ukubhala ngekhodi!