Java is an object-oriented, high-level programming language. Java is used to create robust applications and software. To leverage the functionality of Java, users must write valid Java statement. A valid Java statement is a line of code that the Java Compiler recognizes and can execute.
What Does a Valid Java Statement Contain?
A valid Java statement will contain the following elements:
- Variables
- Operators
- Java expression
- Control flow statements
Variables
Variables are used to store values and can be used in calculations. When writing a Java statement, make sure the variable is declared before it is referenced. Also, all variables in Java must be given unique names.
Operators
Operators are used to manipulate variables, This includes mathematical operations such as addition, subtraction, multiplication, and division. Other types of operators are logical operators, conditional operators, and bit-shift operators.
Java Expression
An expression is any combination of variables and operators, wrapped in parentheses or brackets. It behaves like a single unit, and allows multiple operations to be performed in one statement.
Control Flow Statements
Control flow statements are used to determine how a program should execute. These include if statements, for loops, while loops, and switch statements.
FAQ
What is the Difference Between Variables and Expressions?
Variable are used to store values. An expression is any combination of variables and operators which is grouped together and behaves like a single unit.
How Do You Declare Variables in Java?
In Java, variables must be declared with the specific type of data you wish to store, like an integer, a boolean, a string, or a double. For example, a 'string' data type would be written as: String myString;.
How Are Operators Used in Java?
Operators are used to manipulate variables. They include mathematical operations such as addition, subtraction, multiplication, and division as well as logical operators like and, or, and not. Conditional operators allow comparison of variables, and bit-shift operators allow shifting of bits in a byte.
What is a Control Flow Statement?
Control flow statements are used to determine how a program should execute. Examples includes if statements, for loops, while loops, and switch statements.
What is the Syntax for an If Statement?
The syntax for an if statement is:
if (condition)
{
// Statement(s) will execute if the condition is true
}
What is the Syntax for a While Loop?
The syntax for a while loop is:
while (condition)
{
// Statement(s) will execute as long as the condition is true
}