First knowledge of Java, first knowledge of Java

First knowledge of Java, first knowledge of Java

What is a computer program:A set of ordered commands compiled to allow a computer to execute certain operations or solve a specific problem (in simple words, a set of ordered commands produced by a computer to complete certain functions );

Java:Java Development started as early as 1991. at that time, there was a Green Project in the former Sun Company. Under the leadership of James Gosling, engineers of this project were appointed to design a small computer language for set-top boxes, household appliance control chips and other consumer devices. initially, the new language was named "Oak" (Oak name outside the James Gosling office window), but later, because the name "Oak" was occupied, therefore, the name is changed to "Java ". it is said that this is because when people were thinking about a new name, genuine taste of a kind of coffee from the Java island of Indonesia (this kind of coffee is also called Java ), so I chose "Java" ---- the name of a kind of coffee as the name of the new language, so the mark of Java language is a cup of steaming coffee. james Gosing, founder of Java language, is also known as "father of Java" [Java was a high-level programming language launched by Sun Inc. (now Oracle limited) in 1995, java technology can be used on almost all types and scales of devices, from computer chips, cellular phones, to supercomputer, everywhere.];

Java technical platform:Java SE: Standard Edition Java EE: Enterprise Edition Java ME: mobile edition;

Steps for developing a Java program:1. compile the source program:. the file name must be consistent with the class name B. java is case sensitive. compile:. command: javac file name. java B. generate. class file (only computers do not understand) 3. run:. result;