JAVA: Operator Relational dengan Contoh

Operators constitute the basic building block to any programming language. Java too provides many types of operators which can be used according to the need to perform various calculations and functions, be it logical, arithmetic, relational, etc. They are classified based on the functionality they provide.

Types of Operators:

• Operator Arithmetic
• Operator Unary
• Operator Assignment
• Operator Relational
• Operator Logical
• Operator Ternary
• Operator Bitwise
• Operator Shift

Java Relational Operators are a bunch of binary operators used to check for relations between two operands, including equality, greater than, less than, etc. They return a boolean result after the comparison and are extensively used in looping statements as well as conditional if-else statements and so on. The general format of representing relational operator is:

Syntax:

variable1 relation_operator variable2

Let us look at each one of the relational operators in Java:

Operator 1: ‘Equal to’ operator (==)

This operator is used to check whether the two given operands are equal or not. The operator returns true if the operand at the left-hand side is equal to the right-hand side, else false.

Syntax:

var1 == var2

Illustration:

var1 = "GeeksforGeeks"
var2 = 20
var1 == var2 results in false

Example:

// Java Program to Illustrate equal to Operator

// Importing I/O classes
import java.io.*;
 
// Main class
class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
        // Initializing variables
        int var1 = 5, var2 = 10, var3 = 5;
 
        // Displaying var1, var2, var3
        System.out.println("Var1 = " + var1);
        System.out.println("Var2 = " + var2);
        System.out.println("Var3 = " + var3);
 
        // Comparing var1 and var2 and
        // printing corresponding boolean value
        System.out.println("var1 == var2: "
                           + (var1 == var2));
 
        // Comparing var1 and var3 and
        // printing corresponding boolean value
        System.out.println("var1 == var3: "
                           + (var1 == var3));
    }
}

Output

Var1 = 5
Var2 = 10
Var3 = 5
var1 == var2: false
var1 == var3: true
Operator 2: ‘Not equal to’ Operator(!=)

This operator is used to check whether the two given operands are equal or not. It functions opposite to that of the equal-to-operator. It returns true if the operand at the left-hand side is not equal to the right-hand side, else false.

Syntax:

var1 != var2

Illustration:

var1 = "GeeksforGeeks"
var2 = 20
var1 != var2 results in true

Example:

// Java Program to Illustrate No- equal-to Operator
 
// Importing I/O classes
import java.io.*;

// Main class
class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
        // Initializing variables
        int var1 = 5, var2 = 10, var3 = 5;
 
        // Displaying var1, var2, var3
        System.out.println("Var1 = " + var1);
        System.out.println("Var2 = " + var2);
        System.out.println("Var3 = " + var3);
 
        // Comparing var1 and var2 and
        // printing corresponding boolean value
        System.out.println("var1 == var2: "
                           + (var1 != var2));
 
        // Comparing var1 and var3 and
        // printing corresponding boolean value
        System.out.println("var1 == var3: "
                           + (var1 != var3));
    }
}

Output

Var1 = 5
Var2 = 10
Var3 = 5
var1 == var2: true
var1 == var3: false
Operator 3: ‘Greater than’ operator(>)

This checks whether the first operand is greater than the second operand or not. The operator returns true when the operand at the left-hand side is greater than the right-hand side.

Syntax:

var1 > var2

Illustration:

var1 = 30
var2 = 20 
var1 > var2 results in true

Example:

// Java code to Illustrate Greater than operator
 
// Importing I/O classes
import java.io.*;
 
// Main class
class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
        // Initializing variables
        int var1 = 30, var2 = 20, var3 = 5;
 
        // Displaying var1, var2, var3
        System.out.println("Var1 = " + var1);
        System.out.println("Var2 = " + var2);
        System.out.println("Var3 = " + var3);
 
        // Comparing var1 and var2 and
        // printing corresponding boolean value
        System.out.println("var1 > var2: " + (var1 > var2));
 
        // Comparing var1 and var3 and
        // printing corresponding boolean value
        System.out.println("var3 > var1: "
                           + (var3 >= var1));
    }
}

Output

Var1 = 30
Var2 = 20
Var3 = 5
var1 > var2: true
var3 > var1: false
Operator 4: ‘Less than’ Operator(<)

This checks whether the first operand is less than the second operand or not. The operator returns true when the operand at the left-hand side is less than the right-hand side. It functions opposite to that of the greater-than operator.

Syntax:

var1 < var2

Illustration:

var1 = 10
var2 = 20
var1 < var2 results in true

Example:

// Java code to Illustrate Less than Operator
 
// Importing I/O classes
import java.io.*;
 
// Main class
class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
        // Initializing variables
        int var1 = 10, var2 = 20, var3 = 5;
 
        // Displaying var1, var2, var3
        System.out.println("Var1 = " + var1);
        System.out.println("Var2 = " + var2);
        System.out.println("Var3 = " + var3);
 
        // Comparing var1 and var2 and
        // printing corresponding boolean value
        System.out.println("var1 < var2: " + (var1 < var2));
 
        // Comparing var2 and var3 and
        // printing corresponding boolean value
        System.out.println("var2 < var3: " + (var2 < var3));
    }
}

Output

Var1 = 10
Var2 = 20
Var3 = 5
var1 < var2: true
var2 < var3: false
Operator 5: Greater than or equal to (>=)

This checks whether the first operand is greater than or equal to the second operand or not. The operator returns true when the operand at the left-hand side is greater than or equal to the right-hand side.

Syntax:

var1 >= var2

Illustration:

var1 = 20
var2 = 20
var3 = 10

var1 >= var2 results in true
var2 >= var3 results in true

Example:

// Java Program to Illustrate Greater than or equal to
// Operator
 
// Importing I/O classes
import java.io.*;
 
// Main class
class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
        // Initializing variables
        int var1 = 20, var2 = 20, var3 = 10;
 
        // Displaying var1, var2, var3
        System.out.println("Var1 = " + var1);
        System.out.println("Var2 = " + var2);
        System.out.println("Var3 = " + var3);
 
        // Comparing var1 and var2 and
        // printing corresponding boolean value
        System.out.println("var1 >= var2: "
                           + (var1 >= var2));
 
        // Comparing var2 and var3 and
        // printing corresponding boolean value
        System.out.println("var2 >= var3: "
                           + (var3 >= var1));
    }
}

Output

Var1 = 20
Var2 = 20
Var3 = 10
var1 >= var2: true
var2 >= var3: false
Operator 6: Less than or equal to (<=)

This checks whether the first operand is less than or equal to the second operand or not. The operator returns true when the operand at the left-hand side is less than or equal to the right-hand side.

Syntax:

var1 <= var2

Illustration:

var1 = 10
var2 = 10
var3 = 9 

var1 <= var2 results in true
var2 <= var3 results in false

Example:

// Java Program to Illustrate Less
// than or equal to operator
 
// Importing I/O classes
import java.io.*;
 
// Main class
class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
        // Initializing variables
        int var1 = 10, var2 = 10, var3 = 9;
 
        // Displaying var1, var2, var3
        System.out.println("Var1 = " + var1);
        System.out.println("Var2 = " + var2);
        System.out.println("Var3 = " + var3);

        // Comparing var1 and var2 and
        // printing corresponding boolean value
        System.out.println("var1 <= var2: "
                           + (var1 <= var2));
  
        // Comparing var2 and var3 and
        // printing corresponding boolean value
        System.out.println("var2 <= var3: "
                           + (var2 <= var3));
    }
}

Output

Var1 = 10
Var2 = 10
Var3 = 9
var1 <= var2: true
var2 <= var3: false

Referensi

• https://www.geeksforgeeks.org/java-relational-operators-with-examples/