3- Operators in Java
Download as PPTX, PDF1 like534 views
The document discusses various Java operators and classes. It covers arithmetic, relational, bitwise, logical and assignment operators. It also describes the Number class and its methods for mathematical operations. Additionally, it outlines the Character class and Scanner class for character manipulation and input/output. The document provides examples to demonstrate the different operators and classes.
3- Operators in Java
- 2. Java Operators : P.2 Java provides a rich set of operators to manipulate variables: Arithmetic Operators Relational Operators Bitwise Operators Logical Operators Assignment Operators Miscellaneous Operators
- 3. The Arithmetic Operators: P.3
- 4. The Relational Operators: P.4 Operators Description == (equal to) Checks if the values of two operands are equal or not, if yes then condition becomes true != ( not equal to) Checks if the values of two operands are equal or not, if values are not equal then condition become true > ( greater than) Checks if the value of left operand is greater than the value of right operand, if yes then condition become true < ( less than) Checks if the value of left operand is less than the value of right operand, if yes then condition become true >= (greater than or equal to) Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true. <= ( less than or equal to ) Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true
- 5. The Bitwise Operators: P.5 Java defines several bitwise operators, which can be applied to the integer types, long, int, short, char, and byte. X = 1 X<<3 = 1000 X>>4 = 00001 ---------------- Y = 0101 Y<<2 = 0100 Y>>2 = 0001 ---------------- Y <<= 2 Y = Y<<2 ---------------- Y>>= 2 Y= Y>>2 A = 0011 1010 B = 1010 1101 ---------------- A & B = 0010 1000 A | B = 1011 1111 A ^ B = 1001 0111 ~ A = 1100 0101 I = 0 I + = 2 I = 2 -------- J = 2 J *= 5 J =10 X Y X & Y X | Y X^Y 0 0 0 0 0 0 1 0 1 1 1 0 0 1 1 1 1 1 1 0
- 6. The Logical Operators: P.6 A B A&&B A||B False False False False False True False True True False False True True True True True C ! C True False False True
- 7. The Assignment Operators: P.7 Operator Description Operator Description = C = A+B += (C += A) C = C+A -= (C -=A) C = C – A *= (C *= A) C = C * A /= (C /= A) C = C / A %= (C %= A) C = C % A <<= (C <<= A) C = C<<A >>= (C >>=A) C= C>>A &= (C &= A) C = C & A ^= (C^= A) C = C^ A |= (C |= A) C = C | A
- 8. Miscellaneous Operators: P.8 Conditional Operator: is also known as the ternary operator, This operator consists of three operands and is used to evaluate Boolean expressions
- 9. Instance of Operator: P.9 Is used only for object reference variable, the operator checks whether The object is of a particular type (class type or interface type).
- 10. Example: P.10
- 12. If-else: P.12
- 14. Loop Control Cont. : P.14
- 15. Number Class : P.15 Is Wrapper classes Integer, Long, Byte, Double, Float, Short are subclasses of the abstract class Number
- 16. Number methods : P.16
- 17. Number method Cont. : P.17
- 18. Number method Cont. : P.18 ecp(), log(), pow(), sqrt() sin(), cos(), tan() atan, acos, asin(), atan2 toRadians(), ToDegress() random()
- 19. Character Class : P.19 The Character class offers a number of useful class methods For manipulating characters, You can create a Character object With the Character constructor. Escape Sequences : A character preceded by backslash () is an escape sequence and has special meaning to the compiler
- 20. Escape Sequences Cont. : P.20 Escape Sequence Description t Insert a tab in the text at this point b Insert a backspace in the text at this point n Insert a newline in the text at this point ’ Insert a single quote character in the text at this point ” Insert a double quote character in the text at this point Insert a backslash character in the text at this point
- 21. Character Methods : P.21 Methods Description isLetter() Determines whether the specified char value is a letter isDigit() Determines whether the specified char value is a digit isWhiespace() Determines whether the specified char value is white space isUpperCase() Determines whether the specified char value is uppercase isLowerCase() Determines whether the specified char value is lowercase toUpperCase() Returns the uppercase form of the specified char value toLowerCase() Returns the lowercase form of the specified char value toString() Return a String object representing the specified character value ,that is a one-character string
- 22. Scanner Class : P.22 It has methods for Input Import the package java.util Java program Input StreamOutput Stream System.in – the input stream : is connected to the keyboard and the data are character System.out – the output stream for normal results: connected to the monitor and also are character data System.err – the output stream for error message: connected to the monitor, and also are character data
- 23. Example : P.23