Operators in java

Operators in java

• 1.
  Operators in Java ArithmeticOperators Relational Operators Bitwise Operators Logical Operators Assignment Operators Practice Questions
• 2.
  Arithmetic Operators • Arithmeticoperators are used in mathematical like addition, subtraction etc. The following table lists the arithmetic operators: Operator Description + Additive operator (also used for String concatenation) - Subtraction operator * Multiplication operator / Division operator % Remainder operator
• 3.
  public static voidmain(String[] a) { System.out.println("Arithmetic operator"); System.out.println("the + operator value for 1 + 3 "+(1+3)); System.out.println("the - operator value for 1 + 3 "+(1-3)); System.out.println("the * operator value for 1 + 3 "+(1*3)); System.out.println("the / operator value for 1 + 3 "+(1/3)); System.out.println("the % operator value for 1 + 3 "+(1%3)); } Do and See the output Goto<<slide1>>
• 4.
  Unary Operators • Theunary operators require only one operand; they perform various operations such as incrementing/decrementing a value by one, negating an expression, or inverting the value of a boolean. Operator Description + Unary plus operator; indicates positive value (numbers are positive without this, however) - Unary minus operator; negates an expression ++ Increment operator; increments a value by 1 -- Decrement operator; decrements a value by 1 ! Logical complement operator; inverts the value of a boolean
• 5.
  public static voidmain(String[] a) { int post_increment=1; int post_decrement=2; int pre_increment=3; int pre_decrement=4; post_increment++; post_decrement--; ++pre_increment; --pre_decrement; boolean boolean_variable=true; System.out.println("Unary operator"); System.out.println("the + operator value for +1::"+(+1)); System.out.println("the - operator value for -1::"+(-1)); System.out.println("the ++ operator value for 1++::"+ (post_increment)); System.out.println("the -- operator value for 2--::"+ (post_decrement)); System.out.println("the ++ operator value for ++3::"+ (pre_increment)); System.out.println("the -- operator value for --4::"+ (pre_decrement)); System.out.println("the ! operator value for !true::"+(! boolean_variable)); } Do and See the output GoTo<<SLide1>>
• 6.
  Relational Operators • Anoperator that compares two values . There are following relational operators supported by Java language Operator Description == Checks if the value of two operands are equal or not, if yes then condition becomes true. != Checks if the value of two operands are equal or not, if values are not equal then condition becomes true. > Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true. < Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true. >= Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true. <= Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true.
• 7.
  public static voidmain(String[] y) { System.out.println("Relational operators"); System.out.println("the == operator is 1==1::"+(1==1)); System.out.println("the != operator is 1!=1::"+(1!=1)); System.out.println("the > operator is 1>2::"+(1>2)); System.out.println("the < operator is 1<2::"+(1<2)); System.out.println("the <= operator is 1<=2::"+(1<=2)); System.out.println("the >= operator is 1>=2::"+(1>=2)); } Do and See the output GoTo<<Slide1>>
• 8.
  Logical Operators • Thislogical operator use for join two conditions Operator Description && Called Logical AND operator. If both the operands are non zero then then condition becomes true. || Called Logical OR Operator. If any of the two operands are non zero then then condition becomes true. ! Called Logical NOT Operator. Use to reverses the logical state of its operand. If a condition is true then Logical NOT operator will make false. .
• 9.
  public static voidmain(String[] y) { int x=10, Y=20; boolean a=false; if(x<20&&Y>10) { System.out.println(" the && if condition true"); } else { System.out.println(" the && if condition false"); } if(x<=10||x!=10) { System.out.println(" the || if condition true"); } else { System.out.println(" the || if condition false");} if(!a) { System.out.println(" the ! if condition true"); } else { System.out.println(" the !if condition false"); } } Do and See the output GoTo<<Slide1>>
• 10.
  Bitwise Operators • Bitwiseoperators are used to change individual bits in an operand. Bitwise operator works on bits(0 or 1) and perform bit by bit operation. Operator Description & Binary AND Operator copies a bit to the result if it exists in both operands. | Binary OR Operator copies a bit if it exists in ei0ther operand. ^ Binary XOR Operator copies the bit if it is set in one operand but not both. ~ Binary Ones Complement Operator is unary and has the effect of 'flipping' bits. << Binary Left Shift Operator. The left operands value is moved left by the number of bits specified by the right operand. >> Binary Right Shift Operator. The left operands value is moved right by the number of bits specified by the right operand. >>> Shift right zero fill operator. The left operands value is moved right by the number of bits specified by the right operand and shifted values are filled up with zeros.
• 11.
  public static voidmain(String[] y) { int a1=12; int a2=2; int a3=0; int a4=16; /*8421 * 12=1100 * 1=0001 * & both bits are then it is 1 else it is 0 */ System.out.println("& operator is "+(a1& a2)); System.out.println("| operator is "+(a1| a2)); System.out.println("~ operator is "+(~a1)); System.out.println("<< operator is "+(a1<<1)); System.out.println(">> operator is "+(a1>>1)); } • Do and See the output • GoTo<<Slide1>>
• 12.
  Assignment Operators • Assigninga value to the destination variable Operator Description = Simple assignment operator, Assigns values from right side operands to left side operand += Add AND assignment operator, It adds right operand to the left operand and assign the result to left operand -= Subtract AND assignment operator, It subtracts right operand from the left operand and assign the result to left operand *= Multiply AND assignment operator, It multiplies right operand with the left operand and assign the result to left operand /= Divide AND assignment operator, It divides left operand with the right operand and assign the result to left operand %= Modulus AND assignment operator, It takes modulus using two operands and assign the result to left operand <<= Left shift AND assignment operator >>= Right shift AND assignment operator &= Bitwise AND assignment operator ^= Bitwise exclusive OR and assignment operator |= Bitwise inclusive OR and assignment operator
• 13.
  public static voidmain(String[] y) { System.out.println("assignment operator"); int a5=3; System.out.println("the value a5 += is"+(a5+=1)); System.out.println("the value a5 -= is"+(a5-=1)); System.out.println("the value a5 -= is"+(a5<<=2)); } • Do and See the output • GoTo<<Slide1>>
• 14.
  /** following codeprints i%j value is 2 what should be modify to get value 8 */ int i=45+42-48-5; int j=5+5-8+2; System.out.println("the value of i%j::"+i%j); /** the following code compile errors debug the code and rectify the problem*/ int i=(2(+5-8) (+5-5)+10)*2; System.out.println("the value of i is"+i); /**what should be changed to obtain the value 40.0 to the x value*/ double x=Math.rint(40.6);System.out.println(x);