Code360 powered by Coding Ninjas X Naukri.com. Code360 powered by Coding Ninjas X Naukri.com
Table of contents
1.
Introduction
2.
What are the Binary Operators Used in Java?
3.
Bad Operand Types Error
3.1.
Bad Operand Types for Logical AND (&&) Operator
3.2.
Bad Operand Types for == Operator
3.3.
Bad Operand Types for & Operator
3.4.
Bad Operand Types for >= Operator
4.
Understanding Java Operator Precedence
5.
Frequently Asked Questions
5.1.
What is Java?
5.2.
What is a binary operator?
5.3.
What is Bad operand types error in Java?
5.4.
What are the different operators in Java?
5.5.
What is a Shell/Terminal?
6.
Conclusion
Last Updated: Mar 27, 2024
Medium

Java Error “bad operand types for binary operator

Author Rajat Agrawal
0 upvote
Crack Google SDE interview : Essential projects
Speaker
Saurav Prateek
SDE-2 @
20 Jun, 2024 @ 01:30 PM

Introduction

Java is one of the most popular programming languages. If you are a Java developer, then you have definitely worked with binary operators. A binary operator is an operator which requires two operands. The operators, such as Arithmetic operators, Logical operators, Relational operators, etc., come under the category of Binary operators. Sometimes while working with binary operators, they give bad operand types error. 

bad operand types for binary operator

In this blog, we will discuss about the error bad operand types for binary operators, how they occur and how to resolve them. But before discussing the error, let’s discuss the different binary operators used in Java.

binary operators

What are the Binary Operators Used in Java?

A binary operator is an operator which requires two operands. The binary operators that are frequently used in Java are:-

You can visit the above links to learn more about those operators. Let’s now discuss the bad operand types for binary operator.

You can also read about the topic of Java Destructor, and Duck Number in Java.

Get the tech career you deserve, faster!
Connect with our expert counsellors to understand how to hack your way to success
User rating 4.7/5
1:1 doubt support
95% placement record
Akash Pal
Senior Software Engineer
326% Hike After Job Bootcamp
Himanshu Gusain
Programmer Analyst
32 LPA After Job Bootcamp
After Job
Bootcamp

Bad Operand Types Error

Bad operand types error is a compile time error that occurs when the types of operands are incompatible. For example, if we are performing a logical AND operation on an integer and boolean value, it will result in bad operand types error.  
In some cases, the bad operand types error occurs due to the precedence of operators that eventually leads to incompatible types.  
We will discuss four basic examples to understand the error bad operand types for binary operator, how they occur and how to resolve them.

Bad Operand Types for Logical AND (&&) Operator

Let’s understand with an example how bad operand types errors occur due to logical AND (&&) operator. Practice it on online java compiler.

public class CodingNinjas {
    public static void main(String args[]) {
      int num = 50;
      if((num > 30) && (num * 10)){
          System.out.println("Executing if block.");
      }
      else{
          System.out.println("Executing else block.");
      }
    }
}


Output:

output

Reason for Error: This error occurs because the && operators work on two boolean operands. Here, (num>30) is a boolean operand, but the (num * 10) is an integer that leads to the error.

Resolving Error: To resolve the above error, we need to change the type of the operand (num * 10) from integer to boolean. So we will modify it to (num * 10 == 50) and make it boolean.

Let’s see what the code looks like after resolving the error:

public class CodingNinjas {
    public static void main(String args[]) {
      int num = 50;
      if((num > 30) && (num * 10 == 50)){
          System.out.println("Executing if block.");
      }
      else{
          System.out.println("Executing else block.");
      }
    }
}


Output:

output

Bad Operand Types for == Operator

Let’s understand with an example how bad operand types errors occur due to the == operator in java.

public class CodingNinjas {
    public static void main(String args[]) {
        int num = 500;
        String str = "500";
        if(num == str){
            System.out.println("Executing if block.");
        }
        else{
            System.out.println("Executing else block.");
        }
    }
}


Output:

output

Reason for Error: This error occurs because the == operators work on the same type of operands. Here, num is an integer operand, but the str is a string that leads to the error.

Resolving Error: To resolve the above error, we need to change the type of the operand str from string to integer in the if statement. So we will modify it to Integer.parseInt(str) and make it an integer for comparison.

Let’s see what the code looks like after resolving the error:

public class CodingNinjas {
    public static void main(String args[]) {
        int num = 500;
        String str = "500";
        if(num == Integer.parseInt(str)){
            System.out.println("Executing if block.");
        }
        else{
            System.out.println("Executing else block.");
        }
    }
}


Output:

output

Bad Operand Types for & Operator

Let’s understand with an example how bad operand types errors occur due to the & operator in java.

public class CodingNinjas {
    public static void main(String args[]) {
        int num = 50;
        if( num & 55 == 25){
            System.out.println("Executing if block.");
        }
        else{
            System.out.println("Executing else block.");
        }
    }
}


Output:

output

Reason for Error: This error occurs because the precedence of the == operator is more than that of the & operator. Due to this, 55 == 25 is evaluated first, which gives us a boolean value. After the evaluation of 55 == 25 as a boolean, the first operand num is an integer. Since both the operands will become of different types, the & operator cannot work and results in an error.

Resolving Error: To resolve the above error, we just need to apply the parenthesis on the num & 55. So we will modify it to (num & 55), so the evaluation of this will be done first.

Let’s see what the code looks like after resolving the error:

public class CodingNinjas {
    public static void main(String args[]) {
        int num = 50;
        if( (num & 55) == 25){
            System.out.println("Executing if block.");
        }
        else{
            System.out.println("Executing else block.");
        }
    }
}


Output:

output

Also see, Swap Function in Java

Bad Operand Types for >= Operator

Let’s understand with an example how bad operand types errors occur due to the >= operator in java.

public class CodingNinjas {
    public static void main(String args[]) {
        int num = 75;
        String str = "75";
        if(num >= str){
            System.out.println("Executing if block.");
        }
        else{
            System.out.println("Executing else block.");
        }
      }
}


Output:

output

Reason for Error: This error occurs because the >= operators work on the same type of operands. Here, num is an integer operand, but the str is a string that leads to the error.

Resolving Error: To resolve the above error, we need to change the type of the operand str from string to integer in the if statement. So we will modify it to Integer.parseInt(str) and make it an integer for comparison.

Let’s see what the code looks like after resolving the error:

public class CodingNinjas {
    public static void main(String args[]) {
        int num = 75;
        String str = "75";
        if(num >= Integer.parseInt(str)){
            System.out.println("Executing if block.");
        }
        else{
            System.out.println("Executing else block.");
        }
      }
}


Output:

output

 

Must Read Static Blocks In Java and Hashcode Method in Java.

Understanding Java Operator Precedence

Operators

Description

Precedence

()

[]

.

Parentheses 

Array Subscript 

Member Function

16

++

--

Unary Post Increment 

Unary Post Decrement

15

++

--

+

-

!

~

Unary Pre Increment 

Unary Pre Decrement 

Unary Addition 

Unary Subtraction 

Unary Logical Negation 

Unary Bitwise Complement

14

()

new

Cast 

Object Creation

13

*

/

%

Multiplication

Division

Modulus

12

+

-

Addition

Subtraction

11

>>

<<

Bitwise Right Shift 

Bitwise Left Shift

10

<

<=

>

>=

instanceof

Less than 

Less than or equal 

Greater than 

Greater than or equal 

Type Comparison

9

==

 !=

Equal to 

Not equal to

8
& Bitwise AND 7
^ Bitwise XOR 6
| Bitwise OR 5
&& Logical AND 4
|| Logical OR 3
? : Ternary Conditional 2

+= 

-= 

*= 

/= 

%= 

Assignment 

Addition Assignment 

Subtraction Assignment 

Multiplication Assignment 

Division Assignment 

Modulus Assignment

1

 

Read about Bitwise Operators in C here.

Frequently Asked Questions

What is Java?

Java is also one of the oldest and most popular programming languages. Java is an object-oriented programming language. It is used for back-end, front-end, software development, etc.

What is a binary operator?

 A binary operator is an operator which requires two operands. The operators, such as Arithmetic operators, Logical operators, Relational operators, etc., come under the category of Binary operators.

What is Bad operand types error in Java?

Bad operand types error is a compile time error that occurs when the types of operands are incompatible.

What are the different operators in Java?

The different operators that are present in Java are Arithmetic Operators, Relational Operators, Logical Operators, Bitwise Operators, etc.

What is a Shell/Terminal?

Shell/Terminal is an interactive application/tool that helps to interact with the Operating System and allows us to write commands for doing various tasks.

Conclusion

In this article, we have extensively discussed the error bad operand types for binary operator, how they occur and how to resolve them. I hope you enjoyed this blog on Bad Operand Types For binary Operator in Java.
If you want to learn more, check out our articles on Java TokensJTree In JavaIntroduction to Java SwingJSpinner, and Java Verify And Fibonacci Series in Java
Also, check out these exciting courses from coding ninjas to expand your knowledge, Coding CourseCode StudioInterview ExperienceGuided PathInterview ProblemsTest SeriesLibrary, and Resources

Read more Articles:

Types of information system

Happy Coding!

Previous article
Shift Operators in Java
Next article
Java Instanceof Operator
Live masterclass