From the compiler's perspective, you can name your classes and variables practically whatever you want. The official syntax rules for naming a variable or method in Java are lax. For variables, the ...

The use of descriptive variable names is a software development best practice ... of an inconsistent application of PascalCase throughout the industry. For example, Java network APIs always reference ...

as long as we give each variable its own name. This is useful as we can use the variable name when we want to use what is stored in the box at any time. For example, a variable can be used in the ...