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Exception Handling with Method Overriding: Ambiguity arises when method overriding and exception handling are combined. Which definition should be followed confuses the compiler. Problem categories: It has two different kinds of issues, which are as follows: Problem 1: If The SuperClass doesn’t declare an exception Problem 2: If The SuperClass declares an exception If The […]
June 25, 2022 | Java | No comments
Because our own exceptions are derived classes of Exception, Java allows us to create them. A custom exception or user-defined exception is one we create on our own. Java custom exceptions are used to tailor the exception to user requirements. A User-Defined Exception, also known as a custom exception, is your own exception class that […]
June 24, 2022 | Java | No comments
The Java keywords for managing exceptions include throw, throws, and finally. throw keyword: To throw an exception explicitly in Java, use the throw keyword. The exception object that is to be thrown is specified. The notice that comes with the exception contains a description of the error. These anomalies could be caused by user inputs, […]
June 23, 2022 | Java | No comments
Nested try block in Java: Java allows the use of try blocks inside of other try blocks. The term “nested try block” describes it. The context of the exception is pushed onto the stack with each sentence we enter in a try block. For instance, the outer try block can handle the ArithemeticException whereas the […]
June 23, 2022 | Java | No comments
One or more catch blocks may come after a try block. A distinct exception handler must be present in each catch block. Use a Java multi-catch block, then, if you need to carry out multiple tasks when various exceptions arise. Syntax: Things to keep in mind: Only one catch block is run at a time, […]
June 23, 2022 | Java | No comments
Java has two keywords for managing exceptions: try-catch block. Java try block : To contain code that might throw an exception in Java, use a try block. It has to be applied to the technique. The try block’s remaining statements won’t run if an exception arises at that specific statement. Therefore, it is advised against […]
June 22, 2022 | Java | No comments
One of the efficient ways to deal with runtime failures in Java is through exception handling, which helps to maintain the application’s normal flow. Runtime issues like ClassNotFoundException, IOException, SQLException, RemoteException, etc. are handled via Java’s exception handling framework. What is an exception? An exception is a disruptive occurrence that takes place at run time, […]
June 18, 2022 | Java | No comments
A string can be divided into tokens using Java’s StringTokenizer class. Internally, a StringTokenizer object keeps track of where it is in the string that has to be tokenized. Some procedures move this place ahead of the currently processed characters. By extracting a substring from the string that was used to generate the StringTokenizer object, a token is returned. It offers the initial stage of the parsing procedure, often known as the lexer or scanner. The String Tokenizer class enables applications to tokenize strings. The Enumeration interface is implemented by it. Data parsing is done using this class. We must specify an input string and a string with delimiters to use the String Tokenizer class The characters that divide tokens are known as delimiters. The delimiter string’s characters are all accepted as delimiters. Whitespaces, new lines, spaces, and tabs are the default delimiters. Constructors of StringToken: Let us consider ‘str’ as the string to be tokenized StringTokenizer(String str): Delimiters that are typically used include newline, space, tab, carriage return, and form […]
June 18, 2022 | Java | No comments
The Java class StringBuilder represents a mutable string of characters. The StringBuilder class offers a substitute for the String Class in Java since it constructs a mutable sequence of characters instead of an immutable one as the String Class does. The functions of the StringBuilder and StringBuffer classes are extremely similar because both create changeable […]
June 17, 2022 | Java | No comments
StringBuffer is a String peer class that provides a lot of the same functionality as strings. StringBuffer represents growable and writable character sequences, whereas a string represents fixed-length, immutable character sequences. Characters and substrings can be inserted in the middle or appended to the end of a StringBuffer. Constructors of StringBuffer class : 1. StringBuffer(): It saves […]
June 16, 2022 | Java | No comments