Kecha men intervyuda paydo bo'ldim, intervyuchi menga Array sinfining length xususiyatidan foydalanmasdan massiv uzunligini hisoblash uchun kod yozishni aytdi.
Misol uchun -
char[] array=new Scanner(System.in).nextLine().toCharArray();
// i have to write a code for calculating length of this array
//I can use any operator but use of library is restricted
bu yerda berilgan barcha javoblar String kutubxonasidan foydalanilmoqda.
Yaxshiroq yechim bu usuldan foydalanish bo'lishi mumkin: java.lang.reflect.Array::getLength
Masalan:
import java.lang.reflect.Array;
public class ArrayLength {
public static void main(String[] args) {
char[] array = new char[]{'a', 'b', 'a', 'c'};
System.err.println(Array.getLength(array));
}
}
reflection API ni bilish yaxshi, lekin javoblar nuqtai nazaridan bu ma'nosiz, chunki APIlar cheklangan.
- person ; 09.06.2015
buni sinab ko'ring:
char []c = {'a', 'b', 'c'};
int i = 0;
int l = 0;
try{
while(c[i++] != 0)
{
System.out.println(c[i-1]);
l++;
}
}catch(Exception a)
{};
System.out.println(l);
Sharhlarda mening taklifimga ko'ra, bu yaxshi amaliyot emas.
import java.util.Scanner;
public class QuickTester {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter something: ");
char [] charArr = sc.nextLine().toCharArray();
int i = 0;
try {
while(true) {
char c = charArr[i++];
}
}
catch (ArrayIndexOutOfBoundsException e) {
}
System.out.println("Length: " + (i-1));
}
}
Chiqish:
Enter something: Banana
Length: 6
for each loop buning eng oddiy yechimi.juda kulgili.nega bu biz uchun hozircha qattiq emas, yaxshi ish odam.
- person ; 09.06.2015
length xususiyati bayt-kod darajasida ishlatiladi: arraylength
- person gontard; 09.06.2015
ckabi tilda biz while siklini sindirish uchun uni yangi qator belgisi\nbilan moslashtirgan holda ishlatamiz, lekin obyekt bilan qanday bajariladi. - person schedule 09.06.2015.classfayl src bilan mavjud emasmi? - person schedule 09.06.2015