Quick Summary
- Operators are symbols that perform actions on variables and values.
- Java includes arithmetic, relational, logical, assignment, increment/decrement, and ternary operators.
- Each operator returns a value and helps build logic in Java programs.
1. Arithmetic Operators
Used for mathematical calculations.
Try example:
public class ArithmeticDemo {
public static void main(String[] args) {
int a = 20;
int b = 6;
System.out.println("Addition: " + (a + b));
System.out.println("Subtraction: " + (a - b));
System.out.println("Multiplication: " + (a * b));
System.out.println("Division: " + (a / b));
System.out.println("Modulus: " + (a % b));
}
}2. Relational (Comparison) Operators
Used to compare two values. Returns true or false.
Try example:
public class RelationalDemo {
public static void main(String[] args) {
int x = 15;
int y = 20;
System.out.println(x == y);
System.out.println(x != y);
System.out.println(x > y);
System.out.println(x < y);
System.out.println(x >= y);
System.out.println(x <= y);
}
}3. Logical Operators
Used to combine or invert boolean expressions.
Try example:
public class LogicalDemo {
public static void main(String[] args) {
boolean isVerified = true;
boolean isAdmin = false;
System.out.println(isVerified && isAdmin);
System.out.println(isVerified || isAdmin);
System.out.println(!isVerified);
}
}4. Assignment Operators
Used to assign values to variables with additional operations.
Try example:
public class AssignmentDemo {
public static void main(String[] args) {
int n = 10;
n += 5;
System.out.println(n);
n -= 3;
System.out.println(n);
n *= 2;
System.out.println(n);
n /= 4;
System.out.println(n);
}
}5. Increment & Decrement Operators
Try example:
public class IncrementDecrementDemo {
public static void main(String[] args) {
int value = 10;
System.out.println(value++); // post-increment
System.out.println(++value); // pre-increment
System.out.println(value--); // post-decrement
System.out.println(--value); // pre-decrement
}
}6. Ternary Operator
A compact alternative to if-else.
Try example:
public class TernaryDemo {
public static void main(String[] args) {
int hour = 14;
String message = (hour < 18)
? "Good day from VINAR TECH"
: "Good evening from VINAR TECH";
System.out.println(message);
}
}