Type Casting Operator
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This document discusses various data type conversions in Java including type casting, parsing, and operators. It provides examples of automatic conversions between primitive data types like int to double. When converting between big and small data types, type casting is required to avoid data loss. Parsing converts string values to other data types like Integer.parseInt(). The document also covers unary, binary, relational, logical and bitwise operators along with examples of their usage.
![Program - Automatic Converting
public class AutomaticConversion{
public static void main(String args[]){
int i = 89;
float f = i / 2.5f;
double d = f;
System.out.println("integer : "+i);
System.out.println("float : "+ f);
System.out.println("double : "+ d);
}
}
3
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![Program - Type casting
public class TypeCasting{
public static void main(String args[]){
double d;
d=125.89;
int i=10;
int result =(int) d/i;
System.out.println("d : "+d);
System.out.println("d : "+ i);
System.out.println("result: "+result);
}
}
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![Program – Mix, Type Casting
public class MixingCharTypeCasting{
public static void main(String args[]){
char cv;
int iv1 = 64;
cv = (char) iv1;
System.out.println(“Character Value : ”+
cv);
System.out.println(“Integer Value : ”+ iv1);
}
}
6
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![Program – Mixing Number
public class MixingNumber{
public static void main(String args[]){
double fv1,fv2;
int iv1 =123;
fv1 = iv1/50;
fv2 = iv1/50.0;
System.out.println("fv1 : "+fv1);
System.out.println("fv2 : "+ fv2);
}
}
7
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![Program - Parsing
public class Parsing{
public static void main(String args[]){
String s = “1999”;
int i = Integer.parseInt(s);
System.out.println(i + 10 );
}
}
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![Program – Increment exercise
public class TestIncrement{
public static void main(String args[]){
int i = 0 ;
System.out.println( i++ + i++ + i++ + i++ + i++ +
i++);
System.out.println("Increment = "+ i++ + i++ + i++ +
i++ + i++ + i++);
System.out.println(i);
i = 0;
System.out.println(++i + ++i + ++i + ++i + ++i + ++i
);
System.out.println(i);
} 15
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![Program - Assignment
public class Assignment{
public static void main(String args[]){
int i1, i2, result;
result = (i1 = 1 ) + (i2 = 2);
System.out.println(“i1 = "+i1);
System.out.println(“i2 = "+ i2);
System.out.println(“result = "+
result);
}
}
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![Program - Logical AND
public class TestLogicalAnd{
public static void main(String args[]){
int i = 0;
System.out.println(“Test : "+ ((2<3) &&
(0< i++)));
System.out.println(" I = "+ i);
}
}
23
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![Program - Logical NOT
public class TestLogicalNot{
public static void main(String args[]){
boolean x = true;
System.out.println(" Test = "+ ( !x
));
}
}
25
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Type Casting Operator
- 2. Small to big data type • Will be done automatically • int i = 5; • double d = i; • short s = 10; • int i = s; • long l = i; 2 www.infoviaan.com
- 3. Program - Automatic Converting public class AutomaticConversion{ public static void main(String args[]){ int i = 89; float f = i / 2.5f; double d = f; System.out.println("integer : "+i); System.out.println("float : "+ f); System.out.println("double : "+ d); } } 3 www.infoviaan.com
- 4. Big to Small data type When precision or data loss likely to happen then type casting is required. • double d = 5; • int i = (int)d; • short s = (short) i; • float f = 10.67f; • int x = (int) f; 4 www.infoviaan.com
- 5. Program - Type casting public class TypeCasting{ public static void main(String args[]){ double d; d=125.89; int i=10; int result =(int) d/i; System.out.println("d : "+d); System.out.println("d : "+ i); System.out.println("result: "+result); } } 5 www.infoviaan.com
- 6. Program – Mix, Type Casting public class MixingCharTypeCasting{ public static void main(String args[]){ char cv; int iv1 = 64; cv = (char) iv1; System.out.println(“Character Value : ”+ cv); System.out.println(“Integer Value : ”+ iv1); } } 6 www.infoviaan.com
- 7. Program – Mixing Number public class MixingNumber{ public static void main(String args[]){ double fv1,fv2; int iv1 =123; fv1 = iv1/50; fv2 = iv1/50.0; System.out.println("fv1 : "+fv1); System.out.println("fv2 : "+ fv2); } } 7 www.infoviaan.com
- 8. Parsing • Parsing is used to convert the value of one data type to a value of another data type • Convert String (numeric) value to int, float, double etc. then use Parsing • String s = “678”; • int i; • i = Integer.parseInt(s); • double d = Double.parseDouble(s); • float f = Float.parseFloat(s); • String ss = “true”; • boolean b = Boolean.parseBoolean(ss); 8 www.infoviaan.com
- 9. Program - Parsing public class Parsing{ public static void main(String args[]){ String s = “1999”; int i = Integer.parseInt(s); System.out.println(i + 10 ); } } 9 www.infoviaan.com
- 10. Other data type to String Animal Human • int i = 90; • String s1 = String.valueOf(i); • double d = 78.789; • String s2 = String.valueOf(d); • boolean b = true; • String s3 = String.valueOf(b); 10 www.infoviaan.com
- 11. Operators • An operator, is a special symbols performing specific operations on one, two or three operands and then returning a result. or Increment/ Decrement Other operator: instanceof op. . (dot ) ; (terminator) , (comma) 11 www.infoviaan.com
- 13. Unary Operators () Group operator + Unary Plus - Unary Minus ~ Bitwise Complement ! Logical Negation ++ Pre – or Post-increment -- Pre – or Post-decrement 13 www.infoviaan.com
- 15. Program – Increment exercise public class TestIncrement{ public static void main(String args[]){ int i = 0 ; System.out.println( i++ + i++ + i++ + i++ + i++ + i++); System.out.println("Increment = "+ i++ + i++ + i++ + i++ + i++ + i++); System.out.println(i); i = 0; System.out.println(++i + ++i + ++i + ++i + ++i + ++i ); System.out.println(i); } 15 www.infoviaan.com
- 16. ? Binary Operators a b Operand Operand Operator 16 www.infoviaan.com
- 17. Binary Operators Additive & Multiplicative + - * / % Plus Minus Multiply Divide Remainder = Assignment /Multiple Assignment int a = 25; int b = a = 30; Assignment += Compound Operator -= *= /= %= 17 www.infoviaan.com
- 18. Concatenation (+) • When + is used with after any string & (+ numbers) then it is perform concatenation operation. • And when + is used with int, float, double then it is perform addition operation. System.out.println(“Hello ”+ 20 +30); //Hello 2030 System.out.println(20+30); //50 System.out.println(20+30+” Hello”); //50 Hello 18 www.infoviaan.com
- 19. Program - Assignment public class Assignment{ public static void main(String args[]){ int i1, i2, result; result = (i1 = 1 ) + (i2 = 2); System.out.println(“i1 = "+i1); System.out.println(“i2 = "+ i2); System.out.println(“result = "+ result); } } 19 www.infoviaan.com
- 20. Compound operator • Compound operator provide convenient shorthand. • Compound operators are : += -= /= *= %= <<= >>= >>>= Etc. 20 www.infoviaan.com
- 21. Relational/Conditional Operators < == Less than Greater than Less than or equal to Is equal to > <= >= Greater than or equal to != Not equal to 21 www.infoviaan.com
- 22. Logical Operators && Logical AND Logical OR Logical NOT! || 22 www.infoviaan.com
- 23. Program - Logical AND public class TestLogicalAnd{ public static void main(String args[]){ int i = 0; System.out.println(“Test : "+ ((2<3) && (0< i++))); System.out.println(" I = "+ i); } } 23 www.infoviaan.com
- 24. Program - Logical OR System.out.println(“Test : "+ ((2<3) || (0< i++))); This never gets evaluated! 24 www.infoviaan.com
- 25. Program - Logical NOT public class TestLogicalNot{ public static void main(String args[]){ boolean x = true; System.out.println(" Test = "+ ( !x )); } } 25 www.infoviaan.com
- 26. Bitwise Operators & <<Bitwise AND Bitwise OR Bitwise XOR Left Shift | ^ ~ Bitwise NOT >> Right Shift >>> Unsigned Right Shift 26 www.infoviaan.com
- 28. Bitwise AND • When both condition are 1 then result is 1 otherwise 0. ----; ----; 28 www.infoviaan.com
- 29. Bitwise OR (|) • When any one condition is 1 then result is 1 otherwise 0.----; ----; 29 www.infoviaan.com
- 30. Bitwise XOR(^) • When both condition are same then result is 0 otherwise 1.----; ----; 30 www.infoviaan.com
- 31. Bitwise Left Shift (<<) ----; 31 www.infoviaan.com
- 32. Bitwise Right Shift (>>) ----; 32 www.infoviaan.com
- 33. Bitwise Unsigned Right Shift (>>>) ----; 33 www.infoviaan.com
- 34. Ternary/Conditional Operator ? : If “a” then “x” else “y” • Ternary operator consists of three operands and is used to evaluate Boolean expressions. • The goal of the operator is to decide, which value should be assigned to the variable. 34 www.infoviaan.com
- 35. QA 1. What are the types of casting ? 2.What is Parsing ? 3.What is the difference between the Boolean & operator and the && operator ? 4. What are Compound Assignment Operators ? 5.What is % operator ? 6.What is difference between byte, short, int and long data types ? 7.What is difference between = and == operator ? 8.What is difference between pre increment and post increment operator ? 9.True or False: - Pre-increment is faster than post- increment ? 35 www.infoviaan.com
- 36. Get in Touch Thank You www.infoviaan.com 36 www.infoviaan.com