Final answer:
Identifying lexemes in a Java file involves parsing the code and classifying each piece of syntax as keywords, operators, punctuations, identifiers, and literals. This categorization helps in understanding and processing the code.
Step-by-step explanation:
To identify all lexemes in a Java file and classify them into tokens, one must parse the file and categorize each distinct piece of syntax according to the defined token types. Java tokens can include:
Keywords: Reserved words in Java such as class, public, and static.
Arithmetic Operators: Symbols that represent operations like addition (+), subtraction (-), multiplication (*), and division (/).
Comparison Operators: For comparing values, such as equality (==) and greater than (>).
Logical Operators: Include AND (&&), OR (||), and NOT (!).
Punctuations: Characters like semicolons (;), commas (,), and braces ({}).
Identifiers: Names given to variables, methods, classes, etc.
Integer Literals: Whole numbers without a decimal point.
Double Literals: Numbers with a decimal point.
Each lexeme extracted from the Java code needs to be checked against these categories to determine its correct token classification.