7 Arrays
| Exam objectives covered in this chapter |
What you need to know |
| [5.1] Declare, instantiate, initialize, and use a one-dimensional array. |
How to declare, instantiate, and initialize one-dimensional arrays using single and multiple steps. The do’s and don’ts of each of these steps. |
| [5.2] Declare, instantiate, initialize, and use a multidimensional array. |
How to declare, instantiate, and initialize multidimensional arrays using single and multiple steps, with do’s and don’ts for each of these steps. Accessing elements in asymmetric multidimensional arrays. |
In the Java SE 11 Programmer I exam, you’ll be asked many questions about arrays. To prepare you for such questions, we’ll cover the following in this chapter:
- What are one-dimensional and multidimensional arrays
- Creating arrays in single or multiple steps
- Declaring, allocating, and initialization of an array
- Combining array declaration, allocation, and initialization
Let’s get started.
7.1 Arrays
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[5.1] Declare, instantiate, initialize and use a one-dimensional array |
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[5.2] Declare, instantiate, initialize and use two-dimensional array |
In this section, I’ll cover declaration, allocation, and initialization of one-dimensional and multidimensional arrays. You’ll get to know about the differences between arrays of primitive data types and arrays of objects.