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What Is Array?
An array is a container. It holds a certain number of items of a single type. The array’s length is defined at the time array is created. Afterwards, it is fixed. Let’s discuss arrays in greater detail. Each entry in an array is called element. And each element is accessed by its unique index. Now, how we create, initialize and access an array? One way to create an array is with the new operator. The next statement in the ArrayDemo program allocates an array with enough memory for 10 integer elements and assigns the array to the anArray variable.
What Are the Java Arrays Methods?
Arrays are a powerful and useful concept used in programming. Java provides several methods for performing array manipulations (common tasks, such as copying, sorting and searching arrays) in the java.util.Arrays class.
Some other useful operations provided by methods in the java.util.Arrays class, are:
- Searching an array for a specific value to get the index at which it is placed (the binarySearch() method).
- Comparing two arrays to determine if they are equal or not (the equals() method).
- Filling an array to place a specific value at each index (the fill() method).
- Sorting an array into ascending order. This can be done either sequentially, using the sort() method, or concurrently, using the parallelSort() method.
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