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no such element exception in java

Wissam answered on August 11, 2022 Popularity 10/10 Helpfulness 4/10

answer no such element exception in java

related No Such Element Exception java

no such element exception in java

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/*
	NoSuchElementException is thrown when we try to access an element
    that does not exist in a list through an iterator, as illustrated below. 
*/

import java.util.ArrayList;
import java.util.List;

public class NoSuchElementExceptionDemo {
	public static void main(String[] args) {
		List<Integer> list = new ArrayList<>();

		// The below statement generates a NoSuchElementException
		// The iterator cannot access the non-existent element

		System.out.println(list.iterator().next());
	}
}

Popularity 10/10 Helpfulness 4/10 Language java

Source: Grepper

Tags: element exception java nosuchelementexception

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Contributed on Aug 11 2022

Wissam

0 Answers Avg Quality 2/10

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No Such Element Exception java

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// Short answer:
// The close function causes the problem.
// Do not close the Scanner.
// You may want to use one single Scanner
// for the whole program.
// Can close the scanner when no further
// input needed.

// Long answer:
Scanner scan1 = new Scanner(System.in);
String name = scan1.nextLine();
scan1.close(); // Problem is here

Scanner scan2 = new Scanner(System.in);
String name = scan2.nextLine();
scan2.close();

// Calling the close function of the Scanner object
// will result in closing "System.in" and once
// closed, not sure it can be opened again.
// So you can have one scanner at beginning
// and passing that along everywhere as a parameter,
// public class or something.
// At end of the program or whenever there was
// no more need for inputs, the Scanner can be
// closed.

Popularity 8/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: element

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Contributed on Nov 08 2022

DarkMode

0 Answers Avg Quality 2/10

no such element exception in java

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no such element exception in java

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