1. Open Eclipse, create a new project, and create a new class in the src directory of the project. In order to manipulate the array better, Java provides the length attribute for the array to get the length of the array. The syntax format is as follows.

2. Create a plastic type variable array and initialize it to {1, 2,3,4,5}, create a plastic type variable len, and use the variable array to obtain the array length of the variable len.

3. Use subscripts to refer to array elements and get the array length, and you can use loop statements to access all elements of the array.

4. Accessing array elements from front to back is the traversal and iteration of the array.

5. On the platform of Java SE 5.0, the syntax of enhanced for loop, called for-each loop, is added, which is more suitable for traversing arrays.

6. Create an array of plastic type, initialize the assignment, use the for-each loop, and use the variable aa to access the value of each element in the array.