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Massiv deklaratsiyasi
String[] aArray = new String[5]; String[] bArray = {"a","b","c", "d", "e"}; String[] cArray = new String[]{"a","b","c","d","e"};
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Java-da massiv chiqishi
int[] intArray = { 1, 2, 3, 4, 5 }; String intArrayString = Arrays.toString(intArray); // print directly will print reference value System.out.println(intArray); // [I@7150bd4d System.out.println(intArrayString); // [1, 2, 3, 4, 5]
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Massivdan ArrayList yaratish
String[] stringArray = { "a", "b", "c", "d", "e" }; ArrayList<String> arrayList = new ArrayList<String>(Arrays.asList(stringArray)); System.out.println(arrayList); // [a, b, c, d, e]
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Muayyan qiymat uchun massivni tekshirish
String[] stringArray = { "a", "b", "c", "d", "e" }; boolean b = Arrays.asList(stringArray).contains("a"); System.out.println(b); // true
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Ikki massivni birlashtirish
int[] intArray = { 1, 2, 3, 4, 5 }; int[] intArray2 = { 6, 7, 8, 9, 10 }; // Apache Commons Lang library int[] combinedIntArray = ArrayUtils.addAll(intArray, intArray2);
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Bir qatorda massivni e'lon qilish
method(new String[]{"a", "b", "c", "d", "e"});
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Massiv elementlarini satrga birlashtirish
// containing the provided list of elements // Apache common lang String j = StringUtils.join(new String[] { "a", "b", "c" }, ", "); System.out.println(j); // a, b, c
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ArrayList
Massivga aylantiringString[] stringArray = { "a", "b", "c", "d", "e" }; ArrayList<String> arrayList = new ArrayList<String>(Arrays.asList(stringArray)); String[] stringArr = new String[arrayList.size()]; arrayList.toArray(stringArr); for (String s : stringArr) System.out.println(s);
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Massivni to‘plamga aylantirish (
Set
)Set<String> set = new HashSet<String>(Arrays.asList(stringArray)); System.out.println(set); //[d, e, b, c, a]
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Teskari tartibda elementlar bilan massivni qaytaring
int[] intArray = { 1, 2, 3, 4, 5 }; ArrayUtils.reverse(intArray); System.out.println(Arrays.toString(intArray)); //[5, 4, 3, 2, 1]
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Massivdan elementni olib tashlash
int[] intArray = { 1, 2, 3, 4, 5 }; int[] removed = ArrayUtils.removeElement(intArray, 3);//create a new array System.out.println(Arrays.toString(removed));
byte
Va yana bir narsa - turning qiymatiga asoslangan turdagi massivni yaratishint
(taxminan olingByteBuffer
, undagi 4 baytni tanlang va 8 raqamini qo'yingint
, keyin bularning barchasini (0, 0, 0, 8) massivga aylantiring.byte
qo'ng'iroqni ishlatadigan turdagiarray()
)byte[] bytes = ByteBuffer.allocate(4).putInt(8).array(); for (byte t : bytes) { System.out.format("0x%x ", t); }
Java-da keng tarqalgan 10 ta massiv texnikasi
Java-da quyidagi 10 ta massiv fokuslari keng tarqalgan. Ular dasturlash bo'yicha savollar va javoblar tizimi bo'lgan Stack Overflow bo'yicha eng yuqori reytingga ega.
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