Module 2: Operators

Operators

InstanceOf

• In Java, InstanceOf is operator that checks if the object is an instance of specified class.
• It returns either true or false.
• InstanceOf operator also works for ancestors of the class. syntax:

// class instanceof class
class Student {
    public static void main(String[] args) {
        Student s = new Student();
        String a = "Hello";
        System.out.println(s instanceof Student); //true
        System.out.println(a instanceof String); // true
    }
}

Conditional Operator

• Conditional Operator checks the condition and decides the result on the basis of both conditions.
• It returns either true or false.
• There are three types of Conditional Operator.
  • Conditional AND :
    • AND is applied between two boolean expression and returns true if both the condition are true.
    • if(x<y && y<z) //consider x,y, and z are imaginary integer variable
  • Conditional OR :
    • OR also applied between two boolean expression and returns true if any of both the condition is true.
    • if(x<y || y<z) //consider x,y, and z are imaginary integer variable
  • Ternary Operator :
    • Ternary Operator is works like if-else statement It takes three operands. and evaluate on the basis of the condition provided.
    • boolean isTrue = (x<y) ? 10 : 20 // x and y are imaginary integer variable

Logical Operator

• Logical Operator is used to perform logical operations on boolean expression and let us combine multiple conditional statements.
• There are three types of Logical Operator.
  • Logical AND :
    • AND is applied between two boolean expression and returns true if both the condition are true.
    • if(x<y && y<z) //consider x,y, and z are imaginary integer variable
  • Logical OR :
    • OR also applied between two boolean expression and returns true if any of both the condition is true.
    • if(x<y || y<z) //consider x,y, and z are imaginary integer variable
  • Logical NOT :
    • NOT is applied on a single boolean expression and returns true if the condition is false or vice-versa.
    • if(!(x<y)) //consider x and y are imaginary integer variable

Arithmetic Operator

• Arithmetic Operator is used to perform simple and complex mathematical operations on all primitive data types including integer, float, and characters.

Note : Arithmetic Operator is not applicable on boolean data type.

Note : Arithmetic (+) Operator also works on Strings for concatenation.

• There are two types of Arithmetic Operators.

  • Unary Operator : Unary Operator is used to perform operations on a single operand.

  • int a = 10; a++; // a = 11
    Unary Operator is divided into two types :

    • Increment :
      • Increment is used to increase the value of operand by 1.
      • int a = 10; a++; // a = 11
    • Decrement :
      • Decrement is used to decrease the value of operand by 1.
      • int a = 10; a--; // a = 9

  • Binary Operator :

    • Binary Operator is used to perform operations on two operands.
    • int a = 10 + 20; // a = 30

    Binary Operator is further divided four types :

    • Addition :
      • Addition is used to add two operands.
      • int a = 10 + 20; // a = 30
    • Subtraction :
      • Subtraction is used to subtract two operands.
      • int a = 20 - 10; // a = 10
    • Multiplication :
      • Multiplication is used to multiply two operands.
      • int a = 10 * 20; // a = 200
    • Division :
      • Division is used to divide two operands.
      • int a = 20 / 10; // a = 2
    • Modulus :
      • Modulus is used to find the remainder of two operands.
      • int a = 20 % 10; // a = 0