In java If the two types are compatible, then Java will perform the conversion automatically Example Assign an int value to a long variable Java’s Automatic Conversions When one type of data is assigned to another type of variable, an automatic type conversion will take place if the following two conditions are met The two … Read more
The variable is the basic unit of storage in a Java program. A variable is defined by the combination of an identifier, a type, and an optional initializer. In addition, all variables have a scope, which defines their visibility, and a lifetime. Declaring a Variable in java In Java, all variables must be declared before … Read more
Java defines eight primitive types of data: byte, short, int, long, char, float, double, and boolean byte The smallest integer type is byte. This is a signed 8-bit type that has a range from –128 to 127. Variables of type byte are especially useful when you’re working with a stream of data from a network … Read more
List of java Keywords There are 50 keywords currently defined in the Java language . These keywords, combined with the syntax of the operators and separators, form the foundation of the Java language. These keywords cannot be used as names for a variable, class, or method Table of java Keywords abstract continue for new switch … Read more
The Java if statement works much like the IF statement in any other language. Further, it is syntactically identical to the if statements in C, C++, and C#. Syantax if(condition) statement; Here, condition is a Boolean expression. If condition is true, then the statement is executed. If condition is false, then the statement is bypassed. … Read more
A string in java is a sequence of characters treated as a unit Strings in Java standard objects with built-in language support String – class for immutable (read-only) strings StringBuffer – class for mutable strings can be converted to other types like integers and booleans like other classes, String has constructors and methods unlike other … Read more
Delimiters in java are the characters that split the string into tokens In java we can define any characters as delimiter There are many string split methods provides by Java that uses whitespace character as a delimiter. The whitespace delimiter is the default delimiter in Java The string is made up of two types of … Read more
The Scanner class is part of the java.util class library. and it is used to get user input java.util.Scanner java.util.Scanner is a class in the Java API used to create a Scanner object, an extremely versatile object that you can use to input alphanumeric characters from several input sources and convert them to binary data. … Read more
Singleton class provides a static method to get its static instance to outside world. Singleton design pattern in java We can make constructor as private. So that We can not create an object outside of the class This property is useful to create singleton class in java. Singleton pattern helps us to keep only one … Read more
Polymorphism in Java is a concept by which we can perform a single action in different ways. Polymorphism is derived from 2 Greek words: poly and morphs. The word “poly” means many and “morphs” means forms. So polymorphism means many forms. There are two types of polymorphism in Java compile–time polymorphism runtime polymorphism Compile-time polymorphism … Read more