1.1 Java Origin and development 1.1.3 features of Java language 1. Simple 2. Object-oriented 3. Distribution 4.5. Platform independent 6. Portable 7. Robustness 8. Security 9. High performance 10 multi-thread 11. Dynamic 1.2 Object-Oriented Programming overview 1.2.2 OOP (Object-oriented programming) Benefits 1. Easy Maintenance 2. Reusable 3. Extensible 1.3 Simple Java Program 1.3.2 compile process compiler---source code. Java-->java Edit ---byte code-->java debugger--Program output 1.4 Java bytecode vs. virtual machine 1.4.1 Java platform and Java Virtual Machine Java platform consists of Java API and Java Virtual Machine (JVM) 1.5Java keywords and identifiers 1 The. 5.1 Java keyword 1.5.2 Java identifier Java identifier is used to name variables, methods, objects, and classes. Identifiers consist of characters, underscores, dollar symbols, or numbers that cannot start with a number and are case-sensitive. 1.5.3 The first letter of the Java encoding specification class name and interface name, there is no connector between the words, the variable name and method name are lowercase, there is no connector between the words, and the word is separated by a length of two uppercase and underlined;
Java Private Learning Notes--1th Chapter Java language overview
