Final answer:
The 'int' data type in Java is used for storing whole numbers, suitable for counts and other integer values without decimals.
Step-by-step explanation:
The int data type in Java is used for storing whole numbers. When you're working in Java and need to work with numerical values that do not have decimal parts, you'll use the int data type.
It's important to choose the correct data type for the values you need to store in order to manage memory efficiently and ensure your program works as intended.
For instance, if you're writing a program that counts the number of students in a class, you would use an int because you can't have a fraction of a student.