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Java Operators Operators Arithmetic Operators Relational Operators Bitwise Operators Logical Operators Assignment Operators Conditional Operators Operators Arithmetic Operators Arithmetic operators are used in mathematical expressions in the same way that they are used in algebra. A = 10 and B = 20 + ( Addition ) Ex. A + B will give 30 - ( Subtraction ) Ex. A - B will give -10 * ( Multiplication ) Ex. A * B will give 200 / (Division) Ex. B / A will give 2 % (Modulus) Ex. B % A will give 0 ++ (Increment) Ex. B++ gives 21 -- ( Decrement ) Ex. B-- gives 19 Increment and decrement operators public class Fruit { public static void main(String[] args) { // Declare and initialize three variables int numOranges = 5; int numApples = 10; int numFruit = 0; // Increment oranges and calculate the total fruit numFruit = ++numOranges + numApples; System.out.println(“A totally fruity program”); // Display the result System.out.println(“Value of oranges is “ + numOranges); System.out.println(“Total fruit is “ + numFruit); } } Relational Operators A = 10 and B = 20 == (equal to) Ex: (A == B) is not true != (not equal to) Ex: (A != B) is true. 3 > (greater than) Ex: (A > B) is not true. < (less than) Ex : (A < B) is true. >= (greater than or equal to) <= (less than or equal to) Ex. (A >= B) is not true Ex. (A<= B) is true. Bitwise Operators Bitwise operator works on bits and performs bit-by-bit operation. Assume if a = 60; and b = 13; a = 0011 1100 b = 0000 1101 & (bitwise and) a&b = 0000 1100 | (bitwise or) a|b = 0011 1101 Test with Program Bitwise Operators << (left shift) A= 0011 1100 A << 2 will give 240 which is 1111 0000 >> (right shift) A >> 2 will give 15 which is 1111 Test with Program Logical Operators Boolean A = true, B = false && (logical and) (A && B) is false. || (logical or) (A || B) is true. ! (logical not) !(A && B) is true Test with Program Assignment Operators = C = A + B will assign value of A + B into C += C += A is equivalent to C = C + A -= C -= A is equivalent to C = C - A *= C *= A is equivalent to C = C * A Assignment Operators /= C /= A is equivalent to C = C / A %= C %= A is equivalent to C = C % A <<= C <<= 2 is same as C = C << 2 Bitwise Operators Example public class BitwiseOperators { public static void main(String args[]) int x = 60; int y = 13; int z; System.out.println("x & y : " + (x & y)); System.out.println("x | y : " + (x | y)); System.out.println("x << 2: " + (x << 2)); System.out.println("x >> 2: " + (x >> 2)); } Unary Operators Example class UnaryDemo { public static void main(String[] args) { int result = +1; // result is now 1 System.out.println(result); result--; // result is now 0 System.out.println(result); result++; // result is now 1 System.out.println(result); result = -result; // result is now -1 System.out.println(result); boolean success = false; // false System.out.println(success); // true System.out.println(!success); } } Unary Operators Example class PrePostDemo { public static void main(String[] args){ int i = 3; i++; // prints 4 System.out.println(i); ++i; // prints 5 System.out.println(i); // prints 6 System.out.println(++i); // prints 6 System.out.println(i++); // prints 7 System.out.println(i); } } Logical Operators Example class ConditionalDemo1 { public static void main(String[] args){ int value1 = 1; int value2 = 2; if((value1 == 1) && (value2 == 2)) System.out.println("value1 is 1 AND value2 is 2"); if((value1 == 1) || (value2 == 1)) System.out.println("value1 is 1 OR value2 is 1"); } } Conditional Operator ( ? : ) Conditional operator is also known as the ternary operator x = (expression) ? value if true : value if false public class CondOp { public static void main(String args[]){ int a, b; a = 10; b = (a == 1) ? 20: 30; System.out.println( "Value of b is : " + b ); b = (a == 10) ? 20: 30; System.out.println( "Value of b is : " + b ); } } Precedence of Operators Operators Precedence postfix () [] . (dot operator) Left to right unary ++ - - Right to left multiplicative * additive + shift << >> >>> relational <> <= equality == != bitwise AND & left-to-right bitwise exclusive OR ^ left-to-right bitwise inclusive OR | left-to-right logical AND && left-to-right logical OR || left-to-right ternary ?: right-to-left assignment = += >>>= / ! ~ % - -= >= instanceof *= /= %= &= ^= |= <<= >>= right-to-left Programs Given two ints a and b. Write a code to display sum, sub, mul, div Java Programs