Java is intended to be used in networked/distributed environments. Toward that end, a lot of emphasis has been placed on security. Java enables the construction of virus-free, tamper-free systems. ...Source: Core Java 10th edition....

The main problem is the fact that malicious code can cause its damage because it has gained unauthorized access to system resources. For example, a virus program might gather private information, such as credit card numbers, bank account balances, and passwords, by searching the contents of your computer’s local file system. In order for Java to enable programs to be safely downloaded and executed on the client computer, it was necessary to prevent them from launching such an attack. Java achieved this protection by enabling you to confine an application to the Java execution environment and prevent it from accessing other parts of the computer. ...Source: Java Complete Reference 9th edition....

Python has become popular for business, scientific, and academic applications and is very suitable for the beginning programmer. There are many reasons for the success of Python. Python has a much simpler and cleaner syntax than other popular languages such as Java, C, and C++, which makes it easier to learn. The Python programs in an interactive environment, which encourages

experimentation and rapid turnaround. Python is also very portable between computer systems. The same Python program will run, without change, on Windows, UNIX, Linux, and Macintosh. ....Source: Phyton for Everyone 2nd edition....