On a Windows platform the online Java Runtime Environment (JRE) installer is approximately 0.86 MB and the installed size on disk is about 98MB.
The downloadable full Windows offline JRE installer is larger ~30.2 MB and for MacOS ~50 MB.
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Different languages use different size types for different reasons. In this case, the difference is between ASCII and Unicode. Java characters use 2-bytes to store a Unicode character so as to allow a wider variety of characters in strings, whereas C, at least by default, only uses 1 byte to store a character.
Java tutorials can be found on the internet. There are many forums and web pages offering advice for Java, so take care in what you read. Ensure you are reading the correct piece of information before contacting them.
Java is robust because it is highly supported language, meaning that unlike C you cannot crash your computer with a bad program. Also, another factor in its robustness is its portability across many Operating systems, with is supported by the Java Virtual Machine.
a Java application is a program written with the very popular porgramming language (Java). the Java programs can run on any operating system (windows,linux,mac...etc) and also it can be run on mobile devices too. in order to the java application to run,it needs to have JRE(Java Runtime Enviroment)installed on the device that it will run on.