How to understand the concept of java array

1. Concept

The so-called array is a collection of elements of the same data type arranged in a certain order.

2. Features

(1) Array is a reference data type

(2) There are many elements in the array data, the type must be unified

(3) The length of the array cannot be changed during the running of the program

3. Define Java array

String[] aArray = new String[5];
String[] bArray = {"a","b","c", "d", "e"};
String[] cArray = new String[]{"a","b","c","d","e"};

The first is to define an array and specify the length of the array. We call it dynamic definition here.

The second and third types allocate memory space while also initializing the value

What are the advantages of Java

1. Simple, just understand With 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 programmers from making errors when managing memory;

5. Security, Java must be used in network and distributed environments Prevent virus intrusion;

6. Architecture neutrality, as long as the Java runtime system is installed, it can run on any processor;

7. Portability, Java can be easily Ported to different machines on the network;

8. Interpretation and execution, the Java interpreter directly interprets and executes the Java bytecode.

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