Every time you run Perl, generally speaking, it compiles the source code into the bytecode and then starts executing the bytecode. Javac compiles programs into bytecode, then Java executes the bytecode in the Java virtual machine. For basic operations, Java is generally more verbose than Perl. In Perl, hashes are defined very concisely, while in Java, there is no standard way to define hashes.
What is Java?
Java is a general-purpose computer programming language that is concurrent, class-based, object-oriented, and specifically designed to have as few implementation dependencies as possible. It is intended to enable application developers to “write once, run anywhere” (WORA), which means that compiled Java code can run on all platforms that support Java without the need to recompile it.
What is Perl?
Perl is a family of high-level, general-purpose, dynamic interpreted programming languages. Languages in this family include Perl 5 and Perl 6. Perl supports multi-line strings, simply by inserting newlines in the string or by using the HERE-DOC syntax. Perl also supports interpolation of scalar, array, and hash elements in strings delimited by double quotes.
- Perl uses a simple naming and versioning scheme: Perl 4, 5_005, 5.6, 5.8, 5.10, 5.12, 5.14, 5.16, 5.18. Java 1.5.0 became Java 5, Java 1.6.0 became 6. Java 6 removed the name j2se and is now just javase.
- Perl documentation is generally installed with the interpreter and is available using the perldoc command, a web mirror of the documentation for all versions of Perl since 5.8.8 is available at http://perldoc.perl.org/. All standard Java is documented using javadoc, a tool for dynamically creating Java API html documentation using code comments.
- All Perl modules are organized through CPAN, which is mirrored around the world. All loads on the CPAN are automatically tested on a wide range of architectures and operating systems through the CPAN group of testers. Java does not have a single recognized repository for reusable code, but rather has multiple sources for standardized Java extensions.
- Perl supports multi-line strings, simply by inserting newlines in the string or by using the HERE-DOC syntax. Perl also supports interpolation of scalar, array, and hash elements in strings delimited by double quotes. Java supports multi-line strings by using the “n” escape code to indicate a newline and the + operator to break a long string constant into pieces on successive lines. Variable interpolation is performed by String. Format () method.
- In Perl, hashes are defined very concisely, while in Java, there is no standard way to define hashes.
- For basic operations, Java is generally more verbose than Perl.
- Perl’s flagship web application frameworks are Catalyst and Mojolicious. Java has numerous competing web application frameworks, of which only 57 are open source
- Perl is mainly for scripts compared to Java.