What type of values can the 'long' data type store in Java?

The 'long' data type in Java is designed to store large whole numbers. It is a 64-bit signed integer that can hold values ranging from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807. This makes it suitable for applications where larger numeric values are required than those that can be accommodated by the 'int' data type, which is a 32-bit signed integer.

In the context of numerical values, the other options do not pertain to the 'long' data type. For example, floating-point numbers, which are represented by 'float' or 'double' data types, allow for decimal places and are not compatible with the whole-number constraint of 'long'. Single characters can be stored using the 'char' data type, which represents a single 16-bit Unicode character. Lastly, boolean values representing true/false states are stored using the 'boolean' data type, which can only hold two possible values: true or false.

The versatility and capacity of the 'long' data type make it a fundamental choice for developers requiring the storage and manipulation of large integer numbers in Java applications.