Java is an evergreen programming language. It is a high-level and object-oriented programming language. Java has various applications such as Web development, Android Development, Application Development, Software Development, etc. Therefore, Java has a great demand for all companies across the Globe. All software companies deal with Java developers. Top-level MNCs also use Java programming language in their business and client projects. So we can say that Java is a very important skill for programming students.
Java is the first object-oriented programing language that became very popular and widely used nowadays. Java will never die so that it is known as an evergreen language. However, at a beginner level, the Java programming language is not easy to learn. It will be quite easy to grip if anyone has a basic understanding of C or C++ languages.
Students who are from a coding background know a bit about coding. For students who are from different departments, it is quite impossible to learn Java independently. It will be tough to understand syntaxes and procedures in Java for them. Operators and Expressions in Java are very much vital to write the code. Not all students may have the same skill to solve several cases study-based java assignment problems. It is mandatory for them to solve those assignments and homework before the deadline. At that phase, students need help or assistance to solve their problems. Several companies are available online for Java programming assignments to help such students.
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Expression in Java Example
A Java expression consists of various concepts. Those are variables, operators, literals, and method calls. Sample code is given below,
Example 1 is given below
int sum;
sum = 100;
Here, the value of sum is 100. It is an expression that returns an integer.
Another example (2) is given below
Double x = 5.2, y = 7.4, exp;
exp = x + y - 1.4;
Here, x + y - 1.4 is an expression.
Example 3 is given below
if (x == y)
System.out.println("x is equal to y");
Here, x == y is an expression that returns a Boolean value, either true or false. Similarly, x is larger than y is a string expression (x>y).
Operators and Expressions in Java
Operator in Java is nothing but a symbol. It is used to perform various operations. For example: +, -, *, / etc. Some of the operators in Java are given below:
Unary Operator (expr++ expr-- or ++expr --expr +expr -expr ~ !),
Arithmetic Operator (* / % or + -),
Shift Operator (<< >> >>>),
Relational Operator (< > <= >= instanceof or == !=),
Bitwise Operator (& or ^ or |),
Logical Operator (&& or ||),
Ternary Operator (? :) and
Assignment Operator (= += -= *= /= %= &= ^= |= <<= >>= >>>=).
We can convert an expression into a statement by terminating the expression. It can be done through semicolons (;). It is known as expression statements. Sample code is given below,
x = 50 // expression
x= 50; // statement
Here, we have an expression x= 50. When we add a semicolon (;), we have converted the expression into a statement. The statement is x = 50; Similarly,
++x // expression
++y; // statement
Types of Expressions in Java
Expression statements are very much vital in Java. Generally, a semicolon terminates expressions. In Java, there are four kinds of expression statements are available. Those are given below:
Assignment expressions. Examples are a += 5, b *= 7, or c = 3
Prefix and postfix increment and decrement expressions. Examples are ++a, --b, c++, d--
Method invocations expressions. They always return a value
Object creation expressions. An example is new AreaMeter
Not all expressions return a value except invocations of methods. Because methods are declared as void. It generates a value upon the objective of the code.
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