What is Java Virtual Machine?

 Lombardy is divided physically into three parts from north to south—a mountainous Alpine and pre-Alpine zone; a zone of gently undulating foothills; and a zone of alluvial plains sloping gently to the Po River in the south. The Alpine division reaches a height of 13,284 feet (4,049 metres) in the Bernina. The foothill zone is partly composed of morainic material and contains a number of scenic lakes. The regione is drained southward by many rivers, all of them tributaries of the Po, including the Ticino, the Adda, and the Oglio, with its affluents the Mella and Chiese, and the Mincio. The regione abounds in lakes and contains all or part of Lakes Garda (Italy’s largest lake), Maggiore, Lugano, Como, Iseo, Idro, and Varese and the lakes of the Brianza (Pusiano, Annone, Alserio, and Segrino). The climate is generally continental, with hot summers and cold winters, and rainfall varies from about 24 inches (610 mm) annually in the area near the Po River to 80 inches (2,032 mm) in the ...

 The Java Virtual Machine serves as an additional layer of abstraction between the Java platform and the underlying machine hardware. Java source code can only run on machines with JVM installed. The answer to the question of why the Java Virtual Machine is needed lies in the history of programming. Programming History When the first native programming languages ​​were developed, they were divided into two main categories depending on how these languages ​​interfaced with the underlying hardware. Compiler:  The complete program is written in natural English-like syntax using compilers, then the language compiles (or translates) the entire code into machine code. The compiled code will now run on the hardware. Interpreter:  For interpreters, all high-level code statements are interpreted into machine code while the hardware is running. The hardware will immediately execute the written instructions before considering the next statement. Java Runtime Environment The Java pro...