According to this week's work arrangement, I will review the basic knowledge of Java on the 17th and day of the day. The sources and features of the Java language (only know) 2 JDK and JRE difference 3 How to build A Java programming environment 4 In the Java environment, the "Hello World" program is implemented in the Java environment, please read the first chapter, the second chapter of the second chapter, the second chapter, or the second reference book of this reference book.
