while hasnext java

1. What is hasNext () in Java?
2. What is the difference between hasNext and next method in Java?
3. What is scanner method in Java?
4. What does the scanner class hasNext method return when the end of the file has been reached?
5. What is hasNextDouble in Java?
6. Why do we need iterator in Java?
7. What is iterator in Java?
8. What is the purpose of next () method?
9. Which method is used to check whether the collection has next element or not?
10. What is nextLine method?
11. How do you read in Java?
12. What is UTIL in Java?

What is hasNext () in Java?

The hasNext() is a method of Java Scanner class which returns true if this scanner has another token in its input. There are three different types of Java Scanner hasNext() method which can be differentiated depending on its parameter. ... Java Scanner hasNext (String pattern) Method.

What is the difference between hasNext and next method in Java?

hasNext() : hasNext() method returns true if iterator have more elements. next() : next() method returns the next element and also moves cursor pointer to the next element. hasNext() - Returns true if the iteration has more elements.

What is scanner method in Java?

The Scanner class is used to get user input, and it is found in the java.util package. To use the Scanner class, create an object of the class and use any of the available methods found in the Scanner class documentation.

What does the scanner class hasNext method return when the end of the file has been reached?

What does the Scanner Class's hasNext method return when the end of the file has been reached? If the method returns true, then the file has more data to read. ... When the program is finished using the file, the file must be closed.

What is hasNextDouble in Java?

The hasNextDouble() is a method of Java Scanner class which is used to check if the next token in this scanner's input can be interpreted as a double value using the nextDouble() method. It returns true if the scanner's input can be interpreted as a double value, otherwise returns false.

Why do we need iterator in Java?

Iterator in Java is used to traverse each and every element in the collection. Using it, traverse, obtain each element or you can even remove. ListIterator extends Iterator to allow bidirectional traversal of a list, and the modification of elements.

What is iterator in Java?

An Iterator is an object that can be used to loop through collections, like ArrayList and HashSet. It is called an "iterator" because "iterating" is the technical term for looping. To use an Iterator, you must import it from the java.

What is the purpose of next () method?

next() method finds and returns the next complete token from this scanner. A complete token is preceded and followed by input that matches the delimiter pattern. This method may block while waiting for input to scan, even if a previous invocation of hasNext() returned true.

Which method is used to check whether the collection has next element or not?

The hasNext() method of these interfaces returns true if the collection object has the next element else it returns false.

What is nextLine method?

nextLine() method advances this scanner past the current line and returns the input that was skipped. This method returns the rest of the current line, excluding any line separator at the end. The position is set to the beginning of the next line.

How do you read in Java?

3. Read Result From Java Console

1. import java. io. BufferedReader; import java. io. ...
2. import java. util. Scanner; class GetInputFromUser. ...
3. public class Sample. public static void main(String[] args) // Using Console to input data from user. ...
4. String name = null; int number; java. io.

What is UTIL in Java?

Java. ... util package contains the collections framework, legacy collection classes, event model, date and time facilities, internationalization, and miscellaneous utility classes. This reference will take you through simple and practical methods available in java.