Which of the following objects should be used for reading from text file?
Scanner object A text file can be read using a Scanner object.
What is the correct syntax for creating a Scanner object quizlet?
What is the correct syntax for creating a Scanner object named kb? Scanner kb = new Scanner(System.in);
What is the purpose of the throw statement quizlet?
What is the purpose of the throw statement? It is used to pass control to an error handler when an error situation is detected. Select the missing expression in the code fragment below. The method should continue to prompt the user for a valid integer value until one is entered.
What is recommended if the standard library does not have an exception class that describes your particular error situation?
What is recommended if the standard library does not have an exception class that describes your particular error situation? Design your own exception class as a subclass of an existing exception class.
Which of these methods are used to read in from file?
Which of these methods are used to read in from file? Explanation: Each time read() is called, it reads a single byte from the file and returns the byte as an integer value.
How do you read a text file?
To read from a text file Use the ReadAllText method of the My. Computer. FileSystem object to read the contents of a text file into a string, supplying the path. The following example reads the contents of test.
What is the correct syntax for creating a Scanner object Java?
Scanner sc = new Scanner(System.in); int i = sc. nextInt();
Why does the Scanner class belong to the category of classes known as actors?
5. Why does the Scanner class belong to the category of classes known as actors? a) It acts as an interface between your program and the command line.
How do you create an exception class in java?
Steps to create a Custom Exception with an Example
- CustomException class is the custom exception class this class is extending Exception class.
- Create one local variable message to store the exception message locally in the class object.
- We are passing a string argument to the constructor of the custom exception object.
Which of these is valid code snippet in exception handling in java?
Which of these is valid code snippet in exception handling in java? a. try-catch block.
What method of an exception object print a list of methods that were called before the exception was thrown?
Creating the Exception Object and handling it in the run-time system is called throwing an Exception. There might be a list of the methods that had been called to get to the method where an exception occurred. This ordered list of the methods is called Call Stack.
What are important methods of Java exception class?
Methods of java. clone(), equals(), finalize(), getClass(), hashCode(), notify(), notifyAll(), and wait(). The Exception class has a set of sub-classes for handling different types of exceptions such as IOException, NotBoundException, and NotOwnerException etc.
Which of these methods are used to read string from the console?
This method is called ReadKey().
Which of the following file method is used for writing data to file?
Java FileWriter class is used to write character-oriented data to a file.
What are computer text files?
A text file is a type of digital, non-executable file that contains letters, numbers, symbols and/or a combination. It enables the creation and storage of text without any special formatting. Text files are also known as flat files or ASCII files.
How do I open a text file in Word?
Open an OpenDocument Text file in Word
- Click the Microsoft Office Button. , and then click Open.
- In the File of type list, click OpenDocument Text.
- Click the file you want to open, and then click Open.
How do you use the Scanner method in Java?
Example 1
- import java.util.*;
- public class ScannerExample {
- public static void main(String args()){
- Scanner in = new Scanner(System.in);
- System.out.print("Enter your name: ");
- String name = in.nextLine();
- System.out.println("Name is: " + name);
- in.close();
How do you use a Scanner?
How to Use a Scanner
- Connect the scanner to your PC. …
- Place the material to be scanned into the scanner, just as though you were using a photocopier. …
- Press the scan button on the scanner, which is the button to acquire a digital image. …
- Preview the scan. …
- Select the scan area in the scanner software. …
- Set other options.
Which type of method modifies the object on which it is invoked?
A class that has accessor methods, but does not have mutator methods. Which type of method modifies the object on which it is invoked? A. Constructor method.
What are mutator methods in Java?
In Java, mutator methods reset the value of a private variable. This gives other classes the ability to modify the value stored in that variable without having direct access to the variable itself. Mutator methods take one parameter whose type matches the type of the variable it is modifying.
How do you create a raise and handle user defined exceptions in Python?
To generate a user defined exception, we use the “raise” keyword when a certain condition is met. The exception is then handled by the except block of the code. We then use pass statement. pass statement is used to show that we will not implement anything in our custom exception class.
How should a developer create a new custom exception class?
To create your custom exception class, extend the built-in Exception class and make sure your class name ends with the word Exception , such as “MyException” or “PurchaseException”. All exception classes extend the system-defined base class Exception , and therefore, inherits all common Exception methods.
What method of an exception object returns a message string?
The getMessage() method of Throwable class is used to return a detailed message of the Throwable object which can also be null. One can use this method to get the detail message of exception as a string value.
What are the methods of exception object prints?
Using printStackTrace() method − It print the name of the exception, description and complete stack trace including the line where exception occurred. Using toString() method − It prints the name and description of the exception. Using getMessage() method − Mostly used. It prints the description of the exception.
When an exception occurs in a method the method creates an object?
When an error occurs within a method, the method creates an object and hands it off to the runtime system. The object, called an exception object, contains information about the error, including its type and the state of the program when the error occurred.
Which of the following methods belong to object class?
protected native Object clone() throws CloneNotSupportedException. public boolean equals(Object obj) protected void finalize() throws Throwable.
What is object in Java?
A Java object is a member (also called an instance) of a Java class. Each object has an identity, a behavior and a state. The state of an object is stored in fields (variables), while methods (functions) display the object's behavior. Objects are created at runtime from templates, which are also known as classes.
What is read line method?
The readline() method returns one line from the file. You can also specified how many bytes from the line to return, by using the size parameter.
Which of these methods are used to read from a file?
Which of these methods are used to read in from file? Explanation: Each time read() is called, it reads a single byte from the file and returns the byte as an integer value.
Which of the methods are used to read in from file?
Which of these methods are used to read in from file? Explanation: Each time read() is called, it reads a single byte from the file and returns the byte as an integer value. read() returns -1 when the end of the file is encountered.