Java Statements

Java statements are individual instructions that make up a Java program. Here's an overview:

Expression Statements:

• Perform a specific task and end with a semicolon (;).
• Examples include assignment statements, method invocations, and increment/decrement statements.

Declaration Statements:

• Declare variables or methods.
• Examples include variable declarations (int x;) and method declarations (public void display() {...}).

Control Flow Statements:

• Control the flow of execution in a program.
• Include conditional statements (if, else, switch), looping statements (while, do-while, for), and branching statements (break, continue, return).

Block Statements:

• A block is a group of zero or more statements enclosed in braces {}.
• Used to define the body of methods, classes, and control flow constructs.
• Enables grouping of multiple statements into a single unit.

Example

public class StatementsExample {
    public static void main(String[] args) {
        // Expression statement
        int x = 10;
        int y = 20;
        int sum = x + y;

        // Declaration statement
        int result;

        // Control flow statement
        if (x > y) {
            System.out.println("x is greater than y");
        } else {
            System.out.println("x is less than or equal to y");
        }

        // Block statement
        {
            int a = 5;
            int b = 10;
            int product = a * b;
            System.out.println("Product: " + product);
        }
    }
}

Summary

Java statements are individual instructions that make up a Java program. They include expression statements, declaration statements, control flow statements, and block statements. Understanding these statements is essential for writing correct and structured Java code.