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In the previous article, I have explained about assigning byte, short, long, float and boolean values to the int data type declared variables.
In this article, I am going to explain about assigning ‘out of range’ integer values to the byte, short & int data types.
On assigning the ‘out of range’ integer values, we will get compiler errors and have to rectify them by changing the data type of the declared variable.
Java for Testers – Assigning out of range integer values to the byte, short and int data types
Java will give a compile-time error (i.e. Error will be displayed before executing the program) on assigning the ‘out of range’ integer values to the byte, short and int data type variables.
Let me explain by assigning one after the other ‘out of range’ integer values to the data type variables:
Assigning ‘out of range’ integer values to the byte declared variable
Follow the below steps to find out whether the compiler error is displayed on assigning ‘out of range’ value to the byte data type declared variable:
byte data type declared variable, accepts the integer values in the range of -128 to 127
On assigning the out of range value say 130 to the byte declared variable, we will get compiler error.
Let’s follow the below steps to find out in a practical way:
1) Let’s create a Java program and create a Demo class as shown below:
Note: If you are not aware of creating a Java project and a Class in Java, refer to our previous article – Creating a Java project in Eclipse IDE
2) Inside the main() method, let’s create a variable and declare it with byte data type as shown below:
3) Assing the out of range integer value say 130, to the byte data type variable as shown below:
4) Hover the mouse on the compiler error and observe that the message ‘Type mismatch: cannot convert from int to byte’ as shown below:
5) To fix the above compiler error, we have to change the data type from byte to short and observe that the compiler error will be resolved as shown below:
The above compiler error got resolved as the integer value range for the short data type is -32,768 to 32,767.
Assigning ‘out of range’ integer values to the short declared variable
Follow the below steps to find out whether the compiler error is displayed on assigning ‘out of range’ value to the short data type declared variable:
short data type declared variable, accepts the integer values in the range of -32,768 to 32,767
On assigning the out of range value say 33968 to the short declared variable, we will get compiler error.
Let’s follow the below steps to find out in a practical way:
1) Let’s create a Java program and create a Demo class as shown below:
Note: If you are not aware of creating a Java project and a Class in Java, refer to our previous article – Creating a Java project in Eclipse IDE
2) Inside the main() method, let’s create a variable and declare it with short data type as shown below:
3) Assing the out of range integer value say 33968, to the short data type variable as shown below:
4) Hover the mouse on the compiler error and observe that the message ‘Type mismatch: cannot convert from int to short’ as shown below:
5) To fix the above compiler error, we have to change the data type from short to int and observe that the compiler error will be resolved as shown below:
The above compiler error got resolved as the integer value range for the int data type is – 2,147,483,648 to 2,147,483,647
Assigning ‘out of range’ integer values to the int declared variable
Follow the below steps to find out whether the compiler error is displayed on assigning ‘out of range’ value to the int data type declared variable:
int data type declared variable, accepts the integer values in the range of – 2,147,483,648 to 2,147,483,647
On assigning the out of range value say 33911234567 to the int declared variable, we will get a compiler error.
Let’s follow the below steps to find out in a practical way:
1) Let’s create a Java program and create a Demo class as shown below:
Note: If you are not aware of creating a Java project and a Class in Java, refer to our previous article – Creating a Java project in Eclipse IDE
2) Inside the main() method, let’s create a variable and declare it with int data type as shown below:
3) Assing the out of range integer value say 33911234567, to the int data type variable as shown below:
4) Hover the mouse on the compiler error and observe that the message ‘The literal 33911234567 of type int is out of range’ as shown below:
To fix the above compiler error, we have to first change the data type from int to long and observe that the compiler error will still be there as shown below:
Now, add the letter L at the end of the integer value to make it a long type value and observe the compiler error will be resolved as shown below:
The above error got resolved as the long type value range is -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 and these values should have L added at the end of the value.
Here conclude this article on arranging out or range values to the byte, short and int data type variables and the ways of fixing them.
In the next article, I will explain the remaining things about data types.
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Happy Learning ?
Arun Motoori (www.QAFox.com)
On a mission to help the Testing Community in all possible ways.
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