1. You can access external final type variables in Lambda expressions.
// 转换器 @FunctionalInterface interface Converter { T convert(F from); }
2. Unlike anonymous inner classes, there is no need to explicitly declare the num variable as final type.
int num = 1; Converter stringConverter = (from) -> String.valueOf(from + num); stringConverter.convert(2); // 3
What are the advantages of Java
1. Simple. As long as you understand the basic concepts, you can write applications suitable for various situations;
2. Object-oriented;
3. Distribution, Java is a network-oriented language;
4. Robustness, Java provides automatic garbage collection for memory management, preventing programs from Errors that are easy for operators to make when managing memory;
5. Security, Java used in network and distributed environments must prevent virus intrusion;
6. Architecture neutrality, as long as it is installed With the Java runtime system, it can run on any processor;
7. Portability, Java can be easily transplanted to different machines on the network;
8. Interpretation and execution, The Java interpreter directly interprets and executes Java bytecode.
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