Java Operations Array

Using the Arrays class to manipulate arrays in Java

The Arrays class is a tool class provided in Java, in the Java.util package. The class contains methods for manipulating arrays directly, such as sorting, searching, and so on.

Common methods in Arrays:

1. Sorting

Syntax: arrays.sort (array name);

You can use the sort () method to sort the array by placing the array name in the parentheses of the sort () method, which you can sort by in ascending order

Sequential output using: for (int i = 0;i < scores[].length;i++)

Reverse output using: for (int i = scores[].length;i > 0;i--)

2. Converting an array to a string

Syntax: arrays.tostring (array name);

You can use the ToString () method to convert an array into a string, which connects multiple array elements sequentially, separated by commas and spaces between multiple elements.

3 , fill

Assigning a value to an array: through the Fill method.

4 , equals

Compare arrays: Compares the values of elements in an array by the Equals method.

5 , BinarySearch

Binary search: Search for the range of the specified array using the binary searching method

Using the foreach Action array

foreach is not a keyword in Java, it is a special simplified version of A for statement, which is simpler and easier to iterate through arrays and collections.

Grammar:

Description: The element variable name, can be any combination of greater than or equal to two letters on the line, but not a keyword, cannot be duplicated with the array name, traversing the object is the array name

Java Operations Array