Operators in Java, Operator Precedence in Java, Arithmetic Operators, Relational Operators, Assignment Operators, and Logical Operators.
Java Operators
Operators are used to perform Arithmetic, Comparison, and Logical Operations.
Operators are used to perform operations on variables and values.
Example:
public class JavaOperators {
public static void main(String[] args) {
int a=25, b=20;
int c=a+b;
int d=30*40;
System.out.println(c);//45
System.out.println(d);//70
System.out.println(100+200);//300
System.out.println(“Selenium” + ” Testing”);//Selenium Testing
if (a>b){
System.out.println(“A is a Big Number”);
}
for (int i=1; i<=5; i++){
System.out.println(i);
}
//System.out.println(i);// i is local variable
System.out.println(b);
}
}
Important Categories of Operators in Java:
1. Arithmetic Operators
2. Unary Operators
3. Relational Operators
4. Assignment Operators
5. Logical Operators
1. Arithmetic Operators
Mathematical Operations
Addition
Subtraction
Multiplication
Division
Integer Division
Modules
Exponentiation
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Java Arithmetic Operators
a) Addition + (Addition, String Concatenation)
b) Subtraction – (Subtraction, Negation)
c) Multiplication *
d) Division /
e) Modules %
f) Increment ++
g) Decrement —
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Example:
public static void main(String[] args) {
int a =10, b=3, e=-100;
String c =”Selenium”, d = ” Testing”;
System.out.println(“Addition of a, b is “+ (a+b));
System.out.println(c+d);//Selenium Testing
System.out.println(a-b);//7
System.out.println(e);
System.out.println(a*b);//30
System.out.println(a/b);//3
System.out.println(10.0/3);//3.333333
System.out.println(a % b);//1
b=10;
a = ++b;
System.out.println(a);//11
b=10;
a = –b;
System.out.println(a);//9
double x = Math.pow(10, 4); //10000
System.out.println(x);
//————————————-
float y =1.2F, p=2.34f;
double z =1.345678, q=234.456787;
System.out.println(y+p);//3.54
System.out.println(z+q);
}
}
2. Unary Operators
The Java Unary operators require only one operand, Unary operators are used to performing various operators like increment, decrements, etc…
Java Unary Operators
++, —
Example:
int x=10;
System.out.println(x);//10
//System.out.println(x++);//10
x++;
System.out.println(x);//11
System.out.println(++x);//12
++x;
System.out.println(x);//13
x–;
System.out.println(x);//12
System.out.println(–x);//11
for (int i=1; i<=5; i++) {
System.out.println(i);
}
System.out.println(“”);
for (int i=5; i>=1; i–) {
System.out.println(i);
}
}
}
3. Relational Operators
= (Assignment)
== (Comparison/Relation)
——————————-
a) ==
b) !=
c) >
d) >=
e) <
f) <=
—————————–
Note: Relational Operators return Boolean / Logical Result (true/false)
Example:
public static void main(String[] args) {
int a, b;
a=10; b=20;
System.out.println(a == b);//false
System.out.println(a != b);//true
System.out.println(a > b);//false
System.out.println(a >= b); //false
System.out.println(a < b); //true
System.out.println(a <= b); //true
}
4. Assignment Operators
a) Assignment =
b) Add and Assign +=
c) Subtract and Assign -=
d) Multiply and Assign *=
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Example:
public static void main(String[] args) {
int a =10;
System.out.println(a);//10
a += 10;
System.out.println(a);//20
a -= 10;
System.out.println(a);//10
a *= 10;
System.out.println(a);//100
}
5. Logical Operators
a) Logical Not operator !
b) Logical And operator &&
c) Logical Or operator ||
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Result Criteria for Logical Not Operator
Operand 1 Operand 2 Result
———————————-
true true false
true false true
false true true
false false true
———————————-
Result Criteria for Logical And Operator
Operand 1 Operand 2 Result
——————————-
true true true
true false false
false true false
false false false
——————————-
Result Criteria for Logical Or Operator
Operand 1 Operand 2 Result
——————————-
true true true
true false true
false true true
false false false
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Example:
public static void main(String[] args) {
boolean a = true, b = false;
System.out.println(!(a && b));//true
System.out.println(a && b);//false
System.out.println(a || b);//true
}
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Example 2:
public static void main(String[] args) {
int a =10000, b =5000, c =700;
if ((a > b) && (a > c)){
System.out.println(“A is a Big Number”);
}
else {
System.out.println(“A is Not a Big Number”);
}
}
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public static void main(String[] args) {
int a =10000, b =50000, c =70000;
if ((a > b) || (a > c)){
System.out.println(“A is a Big Number”);
}
else {
System.out.println(“A is Not a Big Number”);
}
}
———————————-
public static void main(String[] args) {
int a =100, b =50, c =70;
if (!(a > b) && (a > c)){
System.out.println(“A is a Big Number”);
}
else {
System.out.println(“A is Not a Big Number”);
}
}
