Java Array Sorting: Usage of Arrays.sort() and Implementing Ascending Order for Arrays

In Java, the commonly used method for array sorting is `Arrays.sort()`, which requires importing the `java.util.Arrays` package. This method sorts arrays in **ascending order** by default and is an "in-place sort" (it directly modifies the original array without returning a new array). For primitive type arrays (such as `int`, `double`, `char`, etc.), sorting is done by numerical or character Unicode order. For example, `int[] {5,2,8}` becomes `{2,5,8}` after sorting; `char[] {'c','a','b'}` sorts to `{'a','b','c'}` based on Unicode values. String arrays are sorted lexicographically (by character Unicode code point order). For instance, `{"banana","apple"}` becomes `{"apple","banana"}` after sorting. Important notes: The `java.util.Arrays` package must be imported; the original array will be modified, and sorting follows the natural order (numerical order for primitives, lexicographical order for strings). In advanced scenarios, custom object arrays can use the `Comparable` interface or `Comparator` to define sorting rules. Mastering this method satisfies most simple array sorting requirements.